A ssessment U nit CAU I nvestigative S kills A ssessment ISA An ISA is the Controlled Assessment Unit for Science It is worth 25 of your GCSE There is no tier of assessment so grades range from U A ID: 261192
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Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
An ISA is the Controlled Assessment Unit for Science.It is worth 25% of your GCSE.There is no tier of assessment so grades range from U - A*.You only need to complete one ISA per GCSE but there are three available ISA’s for each GCSE.
Each ISA is made up of 4 partsResearchSection 1 examPracticalSection 2 examISA’s are done in lesson time and take approximately 7 lessons.Your best ISA grade will be the mark sent to the exam board.Slide2
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISASlide3
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISASlide4
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISASlide5
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISASlide6
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISASlide7
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISASlide8
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Context:Your teacher will describe the context in which the investigation is set.
Relating the investigation to the contextYour teacher will describe the context in which the investigation is set.You must research this context and write down how the results of your investigation might be useful, e.g. health and safety developments, energy efficiency, in industry, etc.
1
Introduce the context of the investigation
You may be asked a question similar to this in the section 2 exam:
How could the results from your investigation be useful in the context that you have researched?
You may use
information
from your Candidate Research Notes to help you to answer this question.
3 marks
Marks
Guidance
0
No credit worthy response
1
An idea from the research has been related to the context
2
An idea from the research has been related to the context and there is a simple explanation of how the idea can be applied and used in the given context
3
An idea from the research has been related to the context
and there is a detailed explanation of how this idea can be applied in the given contextSlide9
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
1
Introduce the context of the investigation
An example of a good answer
An example of a poor answerSlide10
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
2
Planning and preparation
Research:
Once you have been given the context of the investigation you will need to research:
one
or
two possible
methods of carrying out
the investigation
the context
that has been set
any health and
safety issues with the method(s
)
These research notes must be written on the
Candidate Research notes
sheet provided by AQA
Your research should take no more than 3 hours, including homework. In an Additional Science ISA or Separate Science ISA you will also need to use some of this time to come up with a hypothesis.
Your teacher will check your notes before you take the Section 1 exam to ensure you have not included an prohibited information.
Remember these are only supposed to be brief notes but they should include information on the factors
such as the range, interval and number of repeat readings that
you
should take, and
the variables
that need to be
controlled.Slide11
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
2
Planning and preparation
Hypothesis:
For a Science A ISA you will be given the hypothesis
For an Additional Science ISA you will need to come up with a hypothesis
Research sources
List all of the sources you used to carry out your research, such as books, websites or CD-ROMs.
Which source was the most useful and why?
Method(s)
Briefly outline a possible method that could be used to collect useful data to investigate the hypothesis. Think about what you will change, what you will control and what you
will measure.
Equipment
List all the equipment you would need for your method. Think about how you will
set your
investigation up and what you will need to
measure. Select
the most
suitable equipment
to do this.
You may want to draw a diagram.
Risk assessment issues
Record any possible hazards in each method, and the risks they present. Explain
how you
will reduce these.
E.g. acid is an irritant and can cause holes in clothes. To reduce this risk I will
wear goggles
, wipe up spills and wash my hands.
Relating the investigation to the context
Your teacher will describe the context in which the investigation is set
.
You must research this context and write down how the results of your
investigation might
be useful, e.g. health and safety developments, energy efficiency, in industry, etc.Slide12
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Producing a blank table:
You will be required to independently produce a blank table for your results. This is done under exam conditions once the research notes have been completed and before you sit your Section 1 examThe table should be
able to accommodate everything that the you are going to measure and record during the investigation.
The
table
should include
appropriate headings and units.
3
Complete the planning sheet and write a blank table
Independent variable (units)
Dependent variable
(units)
Test 1
Test 2
Test 3
Mean
You may need to include additional information (e.g. start temp, end temp and change in temp).
Marks
Guidance
0
No table or a table with incomplete headings or units for the measured variables.
Fewer than half of the required elements are present.
1
A table with incomplete headings or units for the measured variables.
At least half of the required elements should be present.
2
Correct headings and units present for all measured variables.Slide13
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
3
Complete the planning sheet and write a blank table
All these tables scored full marksSlide14
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1
exam – Science A
Section 1 Exam:
Up
to 45 minutes is
allowed for
this.
The
test may be taken in
the normal
teaching room, provided
that you
can be accommodated
in such
a way as to prevent
any
copying
or unauthorised
collaboration
. However the test will usually take place in the hall, dance studio or drama studio depending on their availability.
If you normally have a reader, extra time, scribe etc. for exams then you will have the same arrangements made for the ISA exam.
Section
1 of the ISA will contain
questions about
the methods that
you have researched
and is worth 20 marks
of the
overall 50 allocated to the
Controlled Assessment.
You may
use
your Candidate Research
notes
sheet, which you filled in during your research
.
Section 1 Exam:
There are normally 5 questions:
Name two sources you used and analyse their usefulness
3 marks
Name a control variable and outline a preliminary investigation to find a suitable value for this variable
3 marks
Describe your plan
9 marks
This question could be on a variety of different topics relating to the idea “what makes a good investigation”
- some examples are given in this
guide
3 marks
Submit the blank table you have drawn for your results
2 marksSlide15
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Research sources:
List all of the sources you used to carry out your research, such as books, websites or CD-ROMs.Which source was the most useful and why?
4
ISA section 1 exam – Science A
Marks
Guidance
0
No credit worthy response
1
Two relevant sources are identified
2
Two relevant
sources are clearly identified and the usefulness of one of the sources is commented on
3
Two relevant
sources are clearly identified and the usefulness of both sources is explained and a comparison made
Additional marking guidance:
A clearly identified source is referred to by title and author or for websites at least the name of the website should be quoted
A clear comment on only one of the sources ay be sufficient to gain 2 marks if the answer implies a comment on the other source.
If candidates have taken part in peer discussion as part of their research, simply stating this is not sufficient to qualify for quoting a source. Similarly reference to their own notes or exercise book alone is insufficient.
You may be asked a question similar to this in the section 1 exam:
Think about the research that you did to find out how to test this hypothesis.
Identify
two
sources that you used for your research.
Which of these
sources was the more useful?
Why was this source better than the other source?
3 marksSlide16
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Science A
An example of a good answerSlide17
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Method(s):
Briefly outline a possible method that could be used to collect useful data to investigate the hypothesis. Think about what you will change, what you will control and what you will measure.
You may be asked a question similar to this in the section 1 exam:
In this investigation, you will need to control some of the variables.
Write down
one
variable that will need to be controlled.
Describe
briefly how you would do a preliminary investigation to find a suitable value
to
use
for this variable.
You should also explain how the results of this preliminary investigation will help you
to decide
on the best value for this variable.
3 marks
4
ISA section 1 exam – Science A
Marks
Guidance
0
No credit worthy response
1
A suitable control variable is stated.
2
A suitable control variable is stated.
Only one value to be investigated in the preliminary experiment is suggested.
The dependent variable is stated, but details concerning its measurement are incomplete.
3
A suitable control variable is stated.
The limits of the range to be investigated in the preliminary experiment are appropriate.
A statement concerning how the dependent variable values obtained could be used to determine the best value for the control variable has been made.Slide18
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Science A
An example of a good answerSlide19
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 1 exam:
In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate.
From the research that you have done, describe in detail how you are going to do your investigation.
You should include:
the equipment that you plan to use
how you will use the equipment
the
measurements that you are going to make
how
you will make it a fair test
a
risk assessment
.
9 marks
4
ISA section 1 exam – Science A
0 marks
1, 2 & 3 marks
4, 5 & 6 marks
7, 8 & 9 marks
Equipment
No creditworthy response
Some of the necessary equipment is stated.
Most of the necessary equipment is stated.
Most of the necessary equipment is stated.
Method
The method described is weak but shows some understanding of the sequence of an investigation.
The method described will enable valid results to be collected.
The method described will enable valid results to be collected.
Measurements
The measurements to be made are stated.
The measurements to be made are stated and a at least one control variable is given.
The measurements to be made are stated and the significant control variables are clearly identified, with details of how they will be monitored or controlled.
Risk assessment
An appropriate hazard is identified, but the corresponding risk assessment and control measure is weak or absent.
Any significant hazards are identified, together with a corresponding control measure but the risk assessment is weak or absent.
Any significant hazards are identified, together with an assessment of the associated risks and corresponding control measures.
Organisation
The answer is poorly organised, with almost no specialist terms and little or no detail given.
The answer has some structure and organisation, use of specialist terms has been attempted but not always correctly, and some detail is given.
The answer is coherent and written in an organised, logical sequence, containing a range of relevant specialist terms used correctly.
SPaG
The answer shows very weak spelling, punctuation and grammar.
The answer shows reasonable spelling, punctuation and grammar although there may still be some errors.
The answer shows almost faultless spelling, punctuation and grammar.Slide20
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Science A
An example of a good answerSlide21
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Method(s):
Briefly outline a possible method that could be used to collect useful data to investigate the hypothesis. Think about what you will change, what you will control and what you will measure.
You may be asked a question similar to this in the section
1
exam:
In your research you will have found other methods you could have used
Briefly outline one other method you could have used.
Explain why you chose not to do this method
3 marks
4
ISA section 1 exam – Science A
Marks
Guidance
0
No credit worthy response
1
An alternative method is outlined briefly although some of the necessary steps may not be clear
OR
A suggestion is given as to why this alternative method would not have been as good as the one chosen
2
An alternative method is outlined briefly although some of the necessary steps may not be clear
OR
A suggestion is given as to why this alternative method would not have been as good as the one chosen
3
An alternative method is outlined in sufficient detail so that the necessary steps are clear
OR
A sensible explanation is given as to why this alternative method would not have been as good as the chosen oneSlide22
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Science A
An example of a good answer
An example of a poor answerSlide23
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Method(s):
Briefly outline a possible method that could be used to collect useful data to investigate the hypothesis. Think about what you will change, what you will control and what you will measure.
You may be asked a question similar to this in the section
1
exam:
When you have completed your investigation, you will be asked to compare your results with others.
Explain the advantages of comparing your results with the results of others.
3 marks
4
ISA section 1 exam – Science A
Marks
Guidance
0
No credit worthy response
1
Allows you to check your results
OR
calculate a more accurate mean
2
Enables you to check your results with those of others to see if there are any similarities or differences
OR
With more results you are able to calculate a more accurate mean and minimize the effect of random errors
3
Enables you to check your results with those of others to see if there are any similarities or differences
OR
With more results you are able to calculate a more accurate mean and minimize the effect of random errors
OR
Enables reproducibility to be confirmedSlide24
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Science A
An example of a good answer
An example of a poor answerSlide25
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Risk assessment issues:
Record any possible hazards in each method, and the risks they present. Explain how you will reduce these.E.g. acid is an irritant and can cause holes in clothes. To reduce this risk I will wear goggles, wipe up spills and wash my hands.
You may be asked a question similar to this in the section
1
exam:
Think about the hazards in your investigation.
Describe
one
hazard in your investigation and say how you would reduce any risks.
3 marks
4
ISA section 1 exam – Science A
Marks
Guidance
0
No credit worthy response
1
An appropriate hazard is identified, but the corresponding risk assessment and control measure is weak or absent
2
Any significant hazards are identified, together with a corresponding control measure but the risk assessment is weak or absent
3
Any significant hazards are identified, together with an assessment of the associated risks and corresponding control measuresSlide26
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Science A
An example of a good answerSlide27
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Producing a blank table:
You will be required to independently produce a blank table for your results. This is done under exam conditions once the research notes have been completed and before you sit your Section 1 examThe table should be
able to accommodate everything that the you are going to measure and record during the investigation.
The
table
should include
appropriate headings and units.
4
ISA section 1 exam – Science A
Independent variable (units)
Dependent variable
(units)
Test 1
Test 2
Test 3
Mean
You may need to include additional information (e.g. start temp, end temp and change in temp).
Marks
Guidance
0
No table or a table with incomplete headings or units for the measured variables.
Fewer than half of the required elements are present.
1
A table with incomplete headings or units for the measured variables.
At least half of the required elements should be present.
2
Correct headings and units present for all measured variables.Slide28
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Science A
All these tables scored full marksSlide29
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1
exam – Additional / Separate Science
Section 1 Exam:
Up
to 45 minutes is
allowed for
this.
The
test may be taken in
the normal
teaching room, provided
that you
can be accommodated
in such
a way as to prevent
any
copying
or unauthorised
collaboration
. However the test will usually take place in the hall, dance studio or drama studio depending on their availability.
If you normally have a reader, extra time, scribe etc. for exams then you will have the same arrangements made for the ISA exam.
Section
1 of the ISA will contain
questions about
the methods that
you have researched
and is worth 20 marks
of the
overall 50 allocated to the
Controlled Assessment.
You may
use
your Candidate Research
notes
sheet, which you filled in during your research
.
Section 1 Exam:
There are normally 5 questions:
Write down and explain your hypothesis
3 marks
Name two sources you used and analyse their usefulness
3 marks
Describe your plan
9 marks
This question could be on a variety of different topics relating to the idea “what makes a good investigation” - some examples are given in this guide
3 marks
Submit the blank table you have drawn for your results
2 marksSlide30
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Hypothesis:For a Additional Science or Separates Science ISA you need to come up with your own hypothesis that fits the topic you have been asked to investigate
You may be asked a question similar to this in the section 1 exam:
Write down your hypothesis
Explain why you made this hypothesis
3 marks
4
ISA section 1 exam – Additional / Separate Science
Marks
Guidance
0
No credit worthy response
1
There is a hypothesis that, by implication, identifies the independent and dependent variables, but there is no explanation.
2
There is a hypothesis that, by implication, identifies the independent and dependent variables, however, the explanation for this hypothesis is unclear.
3
There is a hypothesis that, by implication, identifies the independent and dependent variables, The hypothesis is explained clearly.Slide31
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Additional / Separate
Science
An example of a good answerSlide32
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Research sources:
List all of the sources you used to carry out your research, such as books, websites or CD-ROMs.Which source was the most useful and why?
4
ISA section 1 exam – Additional / Separate Science
Marks
Guidance
0
No credit worthy response
1
Two relevant sources are identified
2
Two relevant
sources are clearly identified and the usefulness of one of the sources is commented on
3
Two relevant
sources are clearly identified and the usefulness of both sources is explained and a comparison made
Additional marking guidance:
A clearly identified source is referred to by title and author or for websites at least the name of the website should be quoted
A clear comment on only one of the sources ay be sufficient to gain 2 marks if the answer implies a comment on the other source.
If candidates have taken part in peer discussion as part of their research, simply stating this is not sufficient to qualify for quoting a source. Similarly reference to their own notes or exercise book alone is insufficient.
You may be asked a question similar to this in the section 1 exam:
Think about the research that you did to find out how to test this hypothesis.
Identify
two
sources that you used for your research.
Which of these
sources was the more useful?
Why was this source better than the other source?
3 marksSlide33
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Additional / Separate Science
An example of a good answerSlide34
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 1 exam:
In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate.
From the research that you have done, describe in detail how you are going to do your investigation.
You should include:
the equipment that you plan to use
how you will use the equipment
the
measurements that you are going to make
how
you will make it a fair test
a
risk assessment
.
9 marks
4
ISA section 1 exam – Additional / Separate Science
0 marks
1, 2 & 3 marks
4, 5 & 6 marks
7, 8 & 9 marks
Equipment
No creditworthy response
Some of the necessary equipment is stated.
Most of the necessary equipment is stated.
Most of the necessary equipment is stated.
Method
The method described is weak but shows some understanding of the sequence of an investigation.
The method described will enable valid results to be collected.
The method described will enable valid results to be collected.
Measurements
The measurements to be made are stated.
The measurements to be made are stated and a at least one control variable is given.
The measurements to be made are stated and the significant control variables are clearly identified, with details of how they will be monitored or controlled.
Risk assessment
An appropriate hazard is identified, but the corresponding risk assessment and control measure is weak or absent.
Any significant hazards are identified, together with a corresponding control measure but the risk assessment is weak or absent.
Any significant hazards are identified, together with an assessment of the associated risks and corresponding control measures.
Organisation
The answer is poorly organised, with almost no specialist terms and little or no detail given.
The answer has some structure and organisation, use of specialist terms has been attempted but not always correctly, and some detail is given.
The answer is coherent and written in an organised, logical sequence, containing a range of relevant specialist terms used correctly.
SPaG
The answer shows very weak spelling, punctuation and grammar.
The answer shows reasonable spelling, punctuation and grammar although there may still be some errors.
The answer shows almost faultless spelling, punctuation and grammar.Slide35
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Additional / Separate Science
An example of a good answerSlide36
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Method(s):
Briefly outline a possible method that could be used to collect useful data to investigate the hypothesis. Think about what you will change, what you will control and what you will measure.
You may be asked a question similar to this in the section
1
exam:
In your research you will have found other methods you could have used
Briefly outline one other method you could have used.
Explain why you chose not to do this method
3 marks
4
ISA section 1 exam – Additional / Separate Science
Marks
Guidance
0
No credit worthy response
1
An alternative method is outlined briefly although some of the necessary steps may not be clear
OR
A suggestion is given as to why this alternative method would not have been as good as the one chosen
2
An alternative method is outlined briefly although some of the necessary steps may not be clear
OR
A suggestion is given as to why this alternative method would not have been as good as the one chosen
3
An alternative method is outlined in sufficient detail so that the necessary steps are clear
OR
A sensible explanation is given as to why this alternative method would not have been as good as the chosen oneSlide37
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Additional / Separate Science
An example of a good answer
An example of a poor answerSlide38
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Method(s):
Briefly outline a possible method that could be used to collect useful data to investigate the hypothesis. Think about what you will change, what you will control and what you will measure.
You may be asked a question similar to this in the section
1
exam:
When you have completed your investigation, you will be asked to compare your results with others.
Explain the advantages of comparing your results with the results of others.
3 marks
4
ISA section 1 exam – Additional / Separate Science
Marks
Guidance
0
No credit worthy response
1
Allows you to check your results
OR
calculate a more accurate mean
2
Enables you to check your results with those of others to see if there are any similarities or differences
OR
With more results you are able to calculate a more accurate mean and minimize the effect of random errors
3
Enables you to check your results with those of others to see if there are any similarities or differences
OR
With more results you are able to calculate a more accurate mean and minimize the effect of random errors
OR
Enables reproducibility to be confirmedSlide39
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Additional / Separate Science
An example of a good answer
An example of a poor answerSlide40
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Risk assessment issues:
Record any possible hazards in each method, and the risks they present. Explain how you will reduce these.E.g. acid is an irritant and can cause holes in clothes. To reduce this risk I will wear goggles, wipe up spills and wash my hands.
You may be asked a question similar to this in the section
1
exam:
Think about the hazards in your investigation.
Describe
one
hazard in your investigation and say how you would reduce any risks.
3 marks
4
ISA section 1 exam – Additional / Separate Science
Marks
Guidance
0
No credit worthy response
1
An appropriate hazard is identified, but the corresponding risk assessment and control measure is weak or absent
2
Any significant hazards are identified, together with a corresponding control measure but the risk assessment is weak or absent
3
Any significant hazards are identified, together with an assessment of the associated risks and corresponding control measuresSlide41
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Additional / Separate Science
An example of a good answerSlide42
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Producing a blank table:
You will be required to independently produce a blank table for your results. This is done under exam conditions once the research notes have been completed and before you sit your Section 1 examThe table should be
able to accommodate everything that the you are going to measure and record during the investigation.
The
table
should include
appropriate headings and units.
4
ISA section 1 exam – Additional / Separate Science
Independent variable (units)
Dependent variable
(units)
Test 1
Test 2
Test 3
Mean
You may need to include additional information (e.g. start temp, end temp and change in temp).
Marks
Guidance
0
No table or a table with incomplete headings or units for the measured variables.
Fewer than half of the required elements are present.
1
A table with incomplete headings or units for the measured variables.
At least half of the required elements should be present.
2
Correct headings and units present for all measured variables.Slide43
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
4
ISA section 1 exam – Additional / Separate Science
All these tables scored full marksSlide44
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
5
Practical
Carrying out the practical:
You can use the method and results table you came up with in Section 1 but it is likely that you will be provided with a method to follow and results table to fill in so class results can be collected.
There
is no specified time limit for
the practical
work, although it is
anticipated that
most experiments should
be capable
of being completed within a
one hour
lesson.
If
necessary however,
the experiment
may be continued over
a number
of lessons. Any paperwork,
e.g. result
tables,
will
be collected
in at
the end of the first lesson, and
returned to
the
you
at the start of the
next lesson.
All results will be pooled together in the second lesson so everyone has a class set of results.
Categoric
data:
Categoric
values have values that are labels. E.g. names of plants or types of material.
You would normally use a bar chart to represent this data.
Continuous data:
Continuous values can have values (called a quantity) that can be given a magnitude either by counting (as in the case of number of shrimp) or by the measurement (e.g. light intensity, flow rate etc.)You would normally use a line graph to represent this data.Slide45
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Producing a graph or bar chart:
You will be required to draw a graph or bar chart of your results
6
Complete practical and draw a graph of your results
Marks
Answer
Additional guidance
1
X axis: suitable scales chosen and labelled with quantity and units.
Scale should be such that the plots occupy at least one third of each axis.
Accept axes reversed.
1
Y axis: suitable scales chosen and labelled with quantity and units.
It may not always be necessary to show the origin.
1
Points or bars plotted correctly to within ± 1 mm.
Allow one plotting error out of each 5 points/bars plotted.
1
Suitable line drawn on graph or bars correctly labelled on bar chart.
Allow error carried forward from incorrect points.
If wrong type of graph / chart, maximum 3 marks.
If the independent variable is:
categoric
, a bar chart should be drawn
continuous, a best fit line should be drawn
N.B.
If no line is possible because there is no correlation, candidates should state this on the graph to gain the mark
Dependent variable (units)
Independent variable (units)
Title:
This should describe what your graph shows
Line of best fit:
This
goes roughly through the middle of all the scatter points on a graph. The closer the points are to the line of best fit the stronger we can say the correlation is
.
It can be a
curve.
Anomalous results:
Put a ring round any outliers to show you know they do not if the pattern.
Jagged line:
These indicate a
broken scale
. A
broken scale is used when values close to 0 are not required.Slide46
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
6
Complete practical and draw a graph of your results
All these graphs scored full marksSlide47
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section
2 exam – Science A
Section 2 Exam:
Up
to
50
minutes is
allowed for
this.
The
test may be taken in
the normal
teaching room, provided
that you
can be accommodated
in such
a way as to prevent
any
copying
or unauthorised
collaboration
. However the test will usually take place in the hall, dance studio or drama studio depending on their availability.
If you normally have a reader, extra time, scribe etc. for exams then you will have the same arrangements made for the ISA exam.
Section
1 of the ISA will contain
questions concerning
conclusions and evaluation
and is worth
30
marks
of the
overall 50 allocated to the
Controlled Assessment.
You may
use
your Candidate Research
notes sheet, which you filled in during your research.You will also be given a data sheet with 4 case studies.
Section 2 Exam:
There are normally 4 questions, some of these questions are made up of more than one part:
Analyse and evaluate your results
What were the variables in the investigation you did?
- e) These questions are on a variety of topics and may vary in number from ISA to ISA
Analyse and evaluate the data given in the case studies
Sketch graph
Explain whether or not the results on the Secondary data sheet support the given hypothesis
Analysis of Case Study 4
This is only a guide there may be more questions based on the case studies
How could the results from your investigation be useful in the context that you have researched?
3 marks
Submit the graph or bar chart you have drawn of your results
4 marksSlide48
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Variables:
These are physical, chemical or biological quantities or characteristics
You may be asked a question similar to this in the section
2
exam:
What
were the variables in the investigation that you did?
The independent variable was
The
dependent variable was
One
control variable was
3 marks
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
Any
one
variable correctly identified
2
Any
two
variables correctly identified
3
Any
three
variables correctly identified
State, give, name, write
down:
Only a short answer is required, not an explanation or a description. Often it can be answered with
a single
word, phrase or sentence.
If the question asks the
you
to state, give, or write down
one
(or
two
etc
) examples,
they should
write down
only
the specified number of answers, or they may lose marks for any
wrong examples
given.Slide49
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answer
An example of a good answerSlide50
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Resolution:
This is the smallest change in quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading.
You may be asked a question similar to this in the section
2
exam:
Think about the way in which you took your measurements.
Resolution means the smallest scale division on the measuring instrument that you were using.
What was the
resolution
of your measurement for…
Do you think that this resolution was appropriate for this investigation?
Explain your answer
3 marks
7
ISA section 2 exam – Science A
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
A correct value for the resolution is given
OR
A sensible but incorrect value is given for the resolution, with a correct statement appropriate to the resolution they have given.
2
A correct value for the resolution is given
OR
A correct statement as to whether or not the resolution was appropriate is given, but the explanation is not clear
3
A correct value for the resolution is given
OR
A correct statement as to whether or not the resolution was appropriate is given with a clear explanationSlide51
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide52
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Repeatable:
A measurement is repeatable if the original experimenter repeats the investigation using the same method and obtains the same results.
You may be asked a question similar to this in the section
2
exam:
Look at your results.
Did you repeat any of the results in your investigation?
Explain why you did or did not repeat any of your results.
You explanation should include examples from your results.
3 marks
7
ISA section 2 exam – Science A
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
There is a correct statement regarding whether or not any measurements were repeated
There is mention of the presence or absence or anomalous results
2
There is a correct statement regarding whether or not any measurements were repeated
There is reference to either anomalous results or to systematic or random uncertainties
3
There is a correct statement regarding whether or not any measurements were repeated and a clear indication of which results were repeated
There is reference to either anomalous results or to systematic or random uncertainties, and the effects that these would causeSlide53
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide54
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section
2
exam:
In your investigation you changed the concentration / mass of X.
What was the range of this variable? Give the units.
The range was from ……… to ………
If you had been able to use another value of this variable, either within or outside this range what value would you have chosen?
Give a reason for your answer
3 marks
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
At least one end of the range is correctly stated.
Another value of the independent variable is suggested, although it may not be appropriate.
2
The range is correctly stated, according to the candidate’s own results.
Another appropriate value of the independent variable is suggested.
The reason for the additional value is unclear or inappropriate.
3
The range is correctly stated, according to the candidate’s own results.
Another appropriate value of the independent variable is suggested.
The reason for the additional value is clear and appropriate.
Range:
The maximum and minimum values of the independent or dependent variables; important in ensuring that any pattern is detected.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide55
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide56
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Hypothesis:A proposal intended to explain certain facts or observations
You may be asked a question similar to this in the section 2 exam:
The hypothesis that you were given before you started the investigation
was
…
Do your results support this hypothesis?
Explain your answer
.
3 marks
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
A simple correct statement is made as to whether or not the results support the hypothesis with an attempt at an explanation
2
A simple correct statement is made as to whether or not the results support the hypothesis and an explanation that includes a
simple
description of a correctly identified pattern or lack of pattern
3
A simple correct statement is made as to whether or not the results support the hypothesis and an explanation that includes a
detailed
description of a correctly identified pattern or lack of pattern.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide57
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide58
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Reproducible:A measurement is reproducible if the investigation is repeated by another person, or by using equipment or techniques, and the same results are obtained.
You may be asked a question similar to this in the section 2 exam:
You have
been given a set of results obtained by other people.
Do these results
other
results show that this investigation is reproducible?
Explain your answer using examples from the results
.
3 marks
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
A simple statement is made as to whether or not the pattern of the other results is similar to the candidate’s results
2
A simple statement is made as to whether or not the pattern of the other results is similar to the candidate’s results and an explanation is provided using either an example from the other results or a correctly identified pattern
3
A simple statement is made as to whether or not the pattern of the other results is similar to the candidate’s results and a detailed explanation is provided using either;
two
examples from the other results
or
a correctly identified and described pattern in the results
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide59
Controlled Assessment Unit - CAUInvestigative
Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answer
An example of a poor answerSlide60
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section
2
exam:
If you were to repeat your experiment, would you make any changed to your method?
Explain why you would or would not make any changes, using examples from your results.
3 marks
7
ISA section 2 exam – Science A
Repeatable:
A measurement is repeatable if the original experimenter repeats the investigation using the same method and obtains the same results.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
Simple appropriate suggestion given as to why changes would be made
2
Simple appropriate suggestion given as to why changes would be made together with examples quoted from the results
3
Simple appropriate suggestion given as to why changes would be made together with examples quoted from the results plus an explanation of why these changes would improve the resultsSlide61
Controlled Assessment Unit - CAUInvestigative Skills A
ssessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide62
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section
2
exam:
You have been given a Secondary Data
Sheet that
provides results from similar investigations.
Draw
a
sketch graph
of the results in Case Study
1
.
3 marks
7
ISA section 2 exam – Science A
Sketch graph:
A line graph, not necessarily on a grid, that shows the general shape of the relationship between two variables. It will not have any points plotted and although the axes should be labelled they may not be scaled.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
Both axes labelled with the variables and units
2
Both axes labelled with the variables and units and an appropriate line drawnSlide63
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answer
An example of a good answerSlide64
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Data:Information, either qualitative or quantitative, that has been collected.
You may also be asked a question similar to this in the section 2 exam
Explain whether or not the results on the Secondary Data Sheet support the
hypothesis
you
were given.
To gain full marks your explanation should include appropriate examples from
the results
in Case studies
1
,
2
and
3
.
3 marks
You may also be asked
a similar
question on a Additional Science or Separate Science
ISA
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
A clear statement is made that Case study
1
supports the hypothesis and a simple correct statement is made about one of the other case studies
2
A clear statement is made that Case study
1
supports the hypothesis and correct statements are made about both Case studies
2
and
3
supported by a more detailed explanation of
one
of them.
3
A clear statement is made that Case study
1
supports the hypothesis and correct statements are made about both Case studies
2
and
3
supported by a more detailed explanation of
both
of them.
Explain
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide65
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide66
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Relationship:When one variable has an effect on another variable
You may also be asked a question similar to this in the section 2 exam
Use
Case Study 4
to answer the question.
What is the relationship between X and Y?
Explain how well the information in
Case Study 4
supports your answer.
3 marks
The content of the question and mark scheme will vary depending on the ISA.
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
There is a statement that the higher the specific heat capacity the smaller the temperature rise produced in the substance
2
There is a statement that the higher the specific heat capacity the smaller the temperature rise produced in the substance and some data is quoted to support this
3
There is a statement that the higher the specific heat capacity the smaller the temperature rise produced in the substance and some data is quoted to support this
There is a realisation that any discerned relationship can only be an approximation using the data in the table, as the data contains some anomalies
Explain;
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide67
Controlled Assessment Unit - CAUInvestigative Skills A
ssessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide68
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Valid conclusion:A conclusion supported by valid data, obtained from an appropriate experimental design and based on sound reasoning.
You may also be asked a question similar to this in the section 2 exam
Look
at
Case
Study 4.
A
X who
saw the
results advised
…
Do you agree with this advice?
Explain your answer.
3 marks
The context of the question and
mark
scheme will vary depending on the ISA.
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
A comment is made as to whether the advice is supported or not
There is a simple statement that uses information from the graph to support the comment
2
A comment is made as to whether the advice is supported or not
There is a statement that uses information from the graph to support the comment
A clear advantage of using “
Ger
-off”
or
a clear disadvantage of using “
Ger
-off” is stated
3
A comment is made as to whether the advice is supported or not
There is a statement that uses information
from the graph to support the comment
A clear advantage of using “
Ger
-off”
and
a clear disadvantage of using “
Ger
-off” is stated
Explain;
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide69
Controlled Assessment Unit - CAUInvestigative Skills A
ssessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide70
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Hypothesis:A proposal intended to explain certain facts or observations
You may be asked a question similar to this in the section 2 exam:
Look at Case Study
4.
To what extent do the results support the hypothesis you were given?
3 marks
The context of the
mark
scheme will vary depending on the ISA
.
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
Increasing the mass of aggregate increases the force needed to break the beam initially, but the strength then declines as more aggregate is added.
2
Increasing the mass of aggregate increases the force needed to break the beam initially, but the strength then declines as more aggregate is added.
The maximum strength of the beam is quoted.
OR
A comment is made regarding the difference in gradient of the graph before and after the peak.
3
Increasing the mass of aggregate increases the force needed to break the beam initially, but the strength then declines as more aggregate is added.
The maximum strength of the beam is quoted.
AND
A comment is made regarding the difference in gradient of the graph before and after the peak.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide71
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answerSlide72
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Context:Your teacher will describe the context in which the investigation is set.
Relating the investigation to the contextYour teacher will describe the context in which the investigation is set.You must research this context and write down how the results of your investigation might be useful, e.g. health and safety developments, energy efficiency, in industry, etc.
7
ISA section 2 exam – Science A
You may be asked a question similar to this in the section 2 exam:
How could the results from your investigation be useful in the context that you have researched?
You may use
information
from your Candidate Research Notes to help you to answer this question.
3 marks
Marks
Guidance
0
No credit worthy response
1
An idea from the research has been related to the context
2
An idea from the research has been related to the context and there is a simple explanation of how the idea can be applied and used in the given context
3
An idea from the research has been related to the context
and there is a detailed explanation of how this idea can be applied in the given contextSlide73
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
An example of a good answer
An example of a poor answerSlide74
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Producing a graph or bar chart:
You will be required to draw a graph or bar chart of your results
7
ISA section 2 exam – Science A
Marks
Answer
Additional guidance
1
X axis: suitable scales chosen and labelled with quantity and units.
Scale should be such that the plots occupy at least one third of each axis.
Accept axes reversed.
1
Y axis: suitable scales chosen and labelled with quantity and units.
It may not always be necessary to show the origin.
1
Points or bars plotted correctly to within ± 1 mm.
Allow one plotting error out of each 5 points/bars plotted.
1
Suitable line drawn on graph or bars correctly labelled on bar chart.
Allow error carried forward from incorrect points.
If wrong type of graph / chart, maximum 3 marks.
If the independent variable is:
categoric
, a bar chart should be drawn
continuous, a best fit line should be drawn
N.B.
If no line is possible because there is no correlation, candidates should state this on the graph to gain the mark
Dependent variable (units)
Independent variable (units)
Title:
This should describe what your graph shows
Line of best fit:
This
goes roughly through the middle of all the scatter points on a graph. The closer the points are to the line of best fit the stronger we can say the correlation is
.
It can be a
curve.
Anomalous results:
Put a ring round any outliers to show you know they do not if the pattern.
Jagged line:
These indicate a
broken scale
. A
broken scale is used when values close to 0 are not required.Slide75
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Science A
All these graphs scored full marksSlide76
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section
2 exam –
Additional / Separate Science
Section 2 Exam:
Up
to
50
minutes is
allowed for
this.
The
test may be taken in
the normal
teaching room, provided
that you
can be accommodated
in such
a way as to prevent
any
copying
or unauthorised
collaboration
. However the test will usually take place in the hall, dance studio or drama studio depending on their availability.
If you normally have a reader, extra time, scribe etc. for exams then you will have the same arrangements made for the ISA exam.
Section
1 of the ISA will contain
questions concerning
conclusions and evaluation
and is worth
30
marks
of the
overall 50 allocated to the
Controlled Assessment.
You may
use
your Candidate Research notes sheet, which you filled in during your research.You will also be given a data sheet with 4 case studies.
Section 2 Exam:
There are normally 4 questions, some of these questions are made up of more than one part:
Analyse and evaluate your results
Do your results support your hypothesis?
- e) These questions are on a variety of topics and may vary in number from ISA to ISA
Analyse and evaluate the data given in the case studies
Sketch graph
Explain whether or not the results on the Secondary data sheet support the given hypothesis
Analysis of Case Study 4
This is only a guide there may be more questions based on the case studies
How could the results from your investigation be useful in the context that you have researched?
3 marks
Submit the graph or bar chart you have drawn of your results
4 marksSlide77
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may also be asked a question similar to this in the section 2 exam
Do your results support the hypothesis that you investigated?
You should use any pattern that you can see in you results to support your answer.
You should include examples from your results
3 marks
7
ISA section 2 exam – Additional / Separate Science
Marks
Guidance
0
No credit worthy response
1
A simple correct statement is made as to whether or not the results support the hypothesis with an attempt at an explanation
2
A simple correct statement is made as to whether or not the results support the hypothesis and an explanation that includes a
simple
description of a correctly identified pattern or lack of pattern
3
A simple correct statement is made as to whether or not the results support the hypothesis and an explanation that includes a
detailed
description of a correctly identified pattern or lack of pattern.
Hypothesis:
A proposal intended to explain certain facts or observations
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide78
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Additional / Separate Science
An example of a good answerSlide79
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Anomalous:
A result that does not fit into a common, familiar, or expected type or pattern
You may be asked a question similar to this in the section
2
exam:
Did you get any anomalous results?
Explain your answer.
Your explanation should include examples from your results.
3 marks
7
ISA section 2 exam – Additional / Separate Science
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
There is a correct statement as to whether or not there are any anomalous results
2
There is a correct statement as to whether or not there are any anomalous results and a statement or implication that anomalous results are ones that do not fit the pattern.
3
There is a correct statement as to whether or not there are any anomalous results and a statement or implication that anomalous results are ones that do not fit the pattern.
Some examples from the results are given to support this,
eg
by specifying results that are considered to be anomalous or by referring to the fact that,
eg
all results are very close to a line of best fit.Slide80
Controlled Assessment Unit - CAUInvestigative Skills A
ssessment - ISA
7
ISA section 2 exam – Additional / Separate Science
An example of a good answerSlide81
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section
2
exam:
Reproducibility is important in experiments
.
Do
you think that your results are
reproducible
by other people?
Use examples from your results to explain the reason for your answer.
3 marks
7
ISA section 2 exam – Additional / Separate Science
Reproducible:
A measurement is reproducible if the investigation is repeated by another person, or by using equipment or techniques, and the same results are obtained.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
A statement is made as to whether or not the results are likely to be reproducible, with a reason stated.
2
A statement is made as to whether or not the results are likely to be reproducible, with a reason stated and an explanation is given.
3
A statement is made as to whether or not the results are likely to be reproducible, with a reason stated and an explanation is given.
There is a detailed explanation supported by at least one example from the results .Slide82
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Additional / Separate Science
An example of a good answerSlide83
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section
2
exam:
Describe in detail how you could use repeated readings to obtain more accurate results.
3 marks
7
ISA section 2 exam – Additional / Separate Science
Repeatable:
A measurement is repeatable if the original experimenter repeats the investigation using the same method and obtains the same results.
Explain:
You
should recall some facts, events or process in an accurate way - for example
an experiment you
have done.
You may
need to give an account of what something looked like,
or what
happened,
eg
a trend in some data.
Accuracy:
A measurement result is considered accurate if it is judged to be close to the true value.
Marks
Guidance
0
No credit worthy response
1
A statement is made that a mean should be calculated.
2
A statement is made that a mean should be calculated by adding the results together and dividing by the number of values.
3
A statement is made that a mean should be calculated, by adding the results together and dividing by the number of values.
A statement is made that
either
anomalous results are discarded before calculating a mean
or
a graph is plotted and a best fit line is drawn ignoring anomalous points Slide84
Controlled Assessment Unit - CAUInvestigative Skills A
ssessment - ISA
7
ISA section 2 exam – Additional / Separate Science
An example of a good answerSlide85
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Range:The maximum and minimum values of the independent or dependent variables; important in ensuring that any pattern is detected.
You may be asked a question similar to this in the section
2
exam:
What was the independent variable in the investigation that you did?
What
was the range of the independent
variable?
The range was
from ……… to ………
Explain
why this was or was not a suitable range.
3 marks
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
At least one end of the range is correctly stated
Another value of the independent variable is suggested, although it may not be appropriate
2
The range is correctly stated, according to the candidate’s own results
Another appropriate value of the independent variable is suggested
The reason for the additional value is unclear or inappropriate
3
The range is correctly stated, according to the candidate’s own results
Another appropriate value of the independent variable is suggested
The reason for the additional value is clear and appropriate
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide86
Controlled Assessment Unit - CAUInvestigative Skills A
ssessment - ISA
7
ISA section 2 exam – Additional / Separate Science
An example of a poor answerSlide87
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Resolution:
This is the smallest change in quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading.
You may be asked a question similar to this in the section
2
exam:
Resolution refers to the smallest scale division of a measuring instrument.
What was the resolution of the device that you used to measure the timing of the reaction?
Do
you think that this resolution was appropriate for this measurement?
Explain your answer.
3 marks
7
ISA section 2 exam – Additional / Separate Science
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
A correct value for the resolution is given
OR
A sensible but incorrect value is given for the resolution, with a correct statement appropriate to the resolution they have given.
2
A correct value for the resolution is given
AND
A correct statement as to whether or not the resolution was appropriate is given, but the explanation is not clear
3
A correct value for the resolution is given
AND
A correct statement as to whether or not the resolution was appropriate is given with a clear explanationSlide88
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
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ISA section 2 exam – Additional / Separate Science
An example of a good answerSlide89
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section
2
exam:
Most investigations contain errors or uncertainties.
What do you think was the cause of the largest error or uncertainty in your investigation?
What
you could do to reduce the size of this error if you were to repeat the investigation?
Explain your answer.
3 marks
7
ISA section 2 exam – Additional / Separate Science
Uncertainty:
The interval within which the true value can be expected to lie, within a given level of confidence or probability.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
There is a statement as to the possible cause of the largest error.
2
There is a statement as to the possible cause of the largest error.
An appropriate suggestion is made regarding how the size of this error might be reduced.
3
There is a statement as to the possible cause of the largest error.
An appropriate suggestion is made regarding how the size of this error might be reduced. together with an explanation regarding how the suggestion might lead to a reduction in the size of the error. Slide90
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Additional / Separate Science
An example of a good answerSlide91
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section
2
exam:
You have been given a Secondary Data
Sheet that
provides results from similar investigations.
Draw
a
sketch graph
of the results in Case Study
1
.
3 marks
7
ISA section 2 exam – Additional / Separate Science
Sketch graph:
A line graph, not necessarily on a grid, that shows the general shape of the relationship between two variables. It will not have any points plotted and although the axes should be labelled they may not be scaled.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.
Marks
Guidance
0
No credit worthy response
1
Both axes labelled with the variables and units
2
Both axes labelled with the variables and units and an appropriate line drawnSlide92
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7
ISA section 2 exam – Additional / Separate Science
An example of a good answer
An example of a good answerSlide93
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may also be asked a question similar to this in the section 2 exam
X investigates the following hypothesis …
Explain whether or not the results in Case Studies
1
,
2
and
3
support this
hypothesis
.
To gain full marks your explanation should include appropriate examples from the results in Case studies
1
,
2
and
3
.
3 marks
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ISA section 2 exam – Additional / Separate Science
Marks
Guidance
0
No credit worthy response
1
A simple correct statement is made about
at least
two of the Case Studies
1
,
2
and
3
, as to whether or not they support the hypothesis.
2
Correct statements are made Case Studies
1
,
2
and
3
, supported by a more detailed explanation of
one
of them.
3
Correct statements are made Case Studies
1
,
2
and
3
, supported by a more detailed explanation of
both
Case Studies
2
and
3
.
Hypothesis:
A proposal intended to explain certain facts or observations
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide94
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
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ISA section 2 exam – Additional / Separate Science
An example of a good answerSlide95
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Hypothesis:A proposal intended to explain certain facts or observations
You may be asked a question similar to this in the section 2 exam:
Look at Case Study
4.
To what extent do the results shown support the manufacturer's hypothesis?
Explain your answer.
3 marks
7
ISA section 2 exam – Science A
Marks
Guidance
0
No credit worthy response
1
There is a simple statement saying whether or not the results in Case study
4
support the manufacturer's hypothesis and this is supported by some
qualitative
information quoted.
2
There is a simple statement saying whether or not the results in Case study
4
support the manufacturer's hypothesis and this is supported by some
quantitative
information quoted.
3
There is a simple statement saying whether or not the results in Case study
4
support the manufacturer's hypothesis and this is supported by some
quantitative
information quoted.
There is also a statement that makes clear the limitations of the data in supporting the hypothesis.
Explain:
You
should make something clear, or state the reasons for something happening.
The points in the answer
must
be linked coherently and logically.
The answer should
not
be a simple list of reasons.Slide96
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
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ISA section 2 exam – Additional / Separate Science
An example of a good answerSlide97
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Context:Your teacher will describe the context in which the investigation is set.
Relating the investigation to the contextYour teacher will describe the context in which the investigation is set.You must research this context and write down how the results of your investigation might be useful, e.g. health and safety developments, energy efficiency, in industry, etc.
7
ISA section 2 exam – Additional / Separate Science
You may be asked a question similar to this in the section 2 exam:
How could the results from your investigation be useful in the context that you have researched?
You may use
information
from your Candidate Research Notes to help you to answer this question.
3 marks
Marks
Guidance
0
No credit worthy response
1
An idea from the research has been related to the context
2
An idea from the research has been related to the context and there is a simple explanation of how the idea can be applied and used in the given context
3
An idea from the research has been related to the context
and there is a detailed explanation of how this idea can be applied in the given contextSlide98
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
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ISA section 2 exam – Additional / Separate Science
An example of a good answer
An example of a poor answerSlide99
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Producing a graph or bar chart:
You will be required to draw a graph or bar chart of your results
7
ISA section 2 exam – Additional / Separate Science
Marks
Answer
Additional guidance
1
X axis: suitable scales chosen and labelled with quantity and units.
Scale should be such that the plots occupy at least one third of each axis.
Accept axes reversed.
1
Y axis: suitable scales chosen and labelled with quantity and units.
It may not always be necessary to show the origin.
1
Points or bars plotted correctly to within ± 1 mm.
Allow one plotting error out of each 5 points/bars plotted.
1
Suitable line drawn on graph or bars correctly labelled on bar chart.
Allow error carried forward from incorrect points.
If wrong type of graph / chart, maximum 3 marks.
If the independent variable is:
categoric
, a bar chart should be drawn
continuous, a best fit line should be drawn
N.B.
If no line is possible because there is no correlation, candidates should state this on the graph to gain the mark
Dependent variable (units)
Independent variable (units)
Title:
This should describe what your graph shows
Line of best fit:
This
goes roughly through the middle of all the scatter points on a graph. The closer the points are to the line of best fit the stronger we can say the correlation is
.
It can be a
curve.
Anomalous results:
Put a ring round any outliers to show you know they do not if the pattern.
Jagged line:
These indicate a
broken scale
. A
broken scale is used when values close to 0 are not required.Slide100
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
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ISA section 2 exam – Additional / Separate Science
All these graphs scored full marks