Newspaper clipping can you find the measurements in it Historically body parts were used as measuring devices The height of a horse was measured in hands Foot comes from the average length of a persons foot ID: 732277
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Slide1
Standards of Measurement
Newspaper clipping - can you find the measurements in it?Slide2
Historically, body parts were used as measuring devices
The height of a horse was measured in hands
Foot comes from the average length of a person's foot.
A pace is the length of a person's step.*What is the mainproblem with this kindof system?Slide3
Match the unit with the item...
A _______________ of milk.
A __________ of material.
A __________ of potatoes.
A __________ of rope.You are driving 60 _______ per hour. a. pound b. milesc. footd. yard
e. gallon
The units above use an ENGLISH system of measurement - used mainly in England and U.S.A.
Most other countries use the
METRIC systemSlide4
You are probably also familiar with some of the metric system units. Match these...
A 2 ______ bottle of soda.
A ________ of sugar.
A ________ stick.
a. gramb. literc. meterSlide5
Science uses the
International System of Units (SI) known as the Metric System. (Get use to it!
Do not say pound, inches, feet, yards, or miles in this class!)
Quantity
Unit
Symbol
Length
Meter
m
Mass
Kilogram
kg
Temperature
Celsius
C
Volume (s)
Cubic meter
m³
Volume (l)
Liter
L
Time
Seconds
sSlide6
Be warned.
You will be doing math in this class.
If a doctor orders 10 cc's of insulin, how many mls is that?Slide7
Metric system units are base 10, so it is easy to convert
Ex. There are 10 millimeters in 1 centimeter
100 centimeters in 1 meter
A mm is about as thick as a dime. Notice there are about 10 dimes between the 6 and the 7 on this photo.
The large number represent centimeters.Slide8
Don't worry about converting inches to centimeters - just measure in centimeters to start with.
Use your ruler to
calculate.
1. Width of your desk _______ cm
2. Width of your desk ______ mm 3. Length of your index finger _____ cm4. Length of your index finger ______mm Slide9
Length Measurements
Millimeter
= small objects, like a quarter
Centimeter
= small objects, your foot or even your heightMeter = larger distances, the size of a roomKilometer = much larger distances, St. Louis to SpringfieldWhat are the english units for the lengths above?Slide10
Volume
measures the amount of something, usually a liquid.
SI units for volume
Liter
Milliliter Beakers and Graduated cylinders used to measure
Slide11
CC = cubic centimeter, which is the same as a ml
Used in medicine Slide12
Mass
: the amount of matter in an object
(
It’s not weight!! Don’t even think that they are the same!! They AREN’T
!) Weight measures mass + gravity Mass is measured in grams and
kilograms.Slide13
Units of
Mass
Grams for small objects or foods
Kilograms for larger objects like people
1000 grams = 1 kilogramSome scales show both pounds and kilograms. How much does this person
weigh?
1lb = .45 kilograms
(well on Earth)Slide14
Tools of Measurement
What do I use to measure the _________?Lengthmetric ruler
Masstriple beam balanceVolume(s) (regular object )
l
x w x hVolume (s) (irregular object)measure the displacement of waterVolume- (l)graduated cylinderTemperaturethermometerSlide15
Dimensional Analysis- Process of converting units
More than 1:da=
deka - 10h= hector - 100K= Kilo – 1000
Less than 1:
m= milli - 1/1000 -As a decimal: ________c= centi - 1/100 -As a decimal: ________ d= deci – 1/10 -As a decimal: ________Slide16
Conversion Factors1m = 100cm
1m = 1000mm1000 m = 1 km1 cm³ = 1cc = 1 ml Slide17
Problems2500 grams to kilogramsSlide18
How many kilograms are equal to 1357 grams?Slide19
How many liters are equal to 3.184 ml?Slide20
How many ml are equal to 5.43cm³Slide21
Quiz TimeSlide22
1. What is the metric unit you would use to measure your foot? ___________________
A football field? ____________
The distance between St. Louis and Chicago? _____
2. ____________is the amount of matter in an object
3. ____________ is the amount of space an object takes up.4. If you were to weigh yourself using the metric system, what unit would you use? __________5. What does SI stand for? ______________________6. Name an equipment that would be used to measure volume? ___________________7. How many millimeters are in a centimeter? ______8. How many grams are in a kilogram? ______