Locate the following safety equipment tell me where they are in the classroom Fire extinguisher Fire Blanket Vent hood Eye wash Safety shower Introduction to the Scientific Method Todays Learning Goal ID: 483440
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Slide1
Journal #2
Locate the following safety equipment (tell me where they are in the classroom):
Fire extinguisher
Fire Blanket
Vent hood
Eye wash
Safety showerSlide2
Introduction to the Scientific MethodSlide3
Today’s Learning Goal:
Today, we will identify the steps of the scientific method.Slide4
Video Clip
https://www.youtube.com/watch?v=_7sSuhQ1_24Slide5
The scientific method can be stated several ways
It involves
looking at the world around you, coming up with an explanation for what you observe, testing your explanation
and
then either accepting your explanation
or
rejecting the explanation and trying to come up with a better one.Slide6
Scientific Method Steps
1. Make
an observationSlide7
Scientific Method Steps
2. Ask
questions
The scientific method starts when you ask a question about something that you observe: How, What, When, Who, Which, Why, or Where?
And, in order for the scientific method to answer the question it must be about something that you can measure, preferably with a number.Slide8
Scientific Method Steps
3. Create
a hypothesis
A hypothesis is an educated guess about how things work.
Most of the time a hypothesis is written like this: "If _____
[I do this]
_____, then _____
[this
]_____ will happen." (Fill in the blanks with the appropriate information from your own experiment.)
Your hypothesis should be something that you can actually test, what's called a testable hypothesis. In other words, you need to be able to measure both "what you do" and "what will happen."Slide9
Scientific Method Steps
4. Conduct
an experiment to the test the hypothesis
Your experiment tests whether your hypothesis is true or false. It is important for your experiment to be a fair test. You conduct a fair test by making sure that you change only one factor at a time while keeping all other conditions the same.
You should also repeat your experiments several times to make sure that the first results weren't just an accident.Slide10
Scientific Method Steps
5.
Collect
data
While performing you experiment, collect your measurements and analyze them to see if your hypothesis is true or false.Slide11
Scientific Method Steps
6. Conclusion
Write a conclusion summarizing the results of your experiment.
Scientists often find that their hypothesis was false, and in such cases they will construct a new hypothesis starting the entire process of the scientific method over again. Even if they find that their hypothesis was true, they may want to test it again in a new way.Slide12
The
independent variable
is the one condition that you change in an experiment
The
dependent variable
is the variable that you measure or observe. The dependent variable gets its name because it is the factor that is
dependent
on the state of the independent variable.
A
control group
in a scientific experiment is a group separated from the rest of the experiment where the independent variable being tested cannot influence the results. This isolates the independent variable's effects on the experiment and can help rule out alternate explanations of the experimental results.Slide13
Example 1:
Mr.
Smith
believes that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers.) Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Mr.
Smith
counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. Slide14
What is the control group?
The control group of this example is Group B, because they are not given the special juice. They are just there for explaining the results
.
What is the experimental group?
The experimental group of this example is Group A, because they are given the special juice. This is the factor that you are experimenting on.
What is the independent variable?
The
special juice
What
is the dependent variable?
Stacks
of papersSlide15
Example 2:
A horticulturist (plant scientist) complains to the city that a nearby residence is ruining his sunflowers because of the detergent being used to wash their cars. The soap runs into a stream that goes near his flower beds. As an inquiring scientist, you want to find out whether soap can affect sunflower growth
.
-Explain an experiment that could be conducted to test this.Slide16
What is the control group?
The control group of this example is the flowers given no soap.
What
is the experimental group?
Flowers given soap
What is the independent variable?
The Soap
What
is the dependent variable?
Flower growthSlide17
Scientific Method for M&Ms
What things might we want to know about this bag of M&M’s
?
Can we create a hypothesis?
How can we determine which hypothesis is correct? What data will we collect?
GroupsSlide18
Today’s Assignment
The squares I gave you are in incorrect order
Cute the squares out
Arrange them in the correct order
Glue/tape them
onto a separate piece of paper
Turn into the tray when completeSlide19
Review
What is the first step of the scientific method?
How must a hypothesis be written?
When conducting an experiment, how many factors should be changed?Slide20
What Is Today’s Learning Goal?
We will identify the steps of the scientific method.Slide21
Exit Ticket
List the steps of the Scientific Method