1. Measurement

2. Why do we measure?
What are the reasons we
measure?
Why is it important to
measure in science?

3. Find the length, weight, volume, or temperature
Gather data
Track growth
Find the length, weight, volume, or
temperature
Collect accurate measurements

4. In science, it is
VERY IMPORTANT
to measure
ACCURATELY!

5. The
Metric
System

6. In science, we use the Metric System.
Scientists had to come up with a uniform way of measuring things.
Why?

7. Can you think of any items in the grocery store or department store that is measured in the metric system?
What about the shoe store?

8. The Metric System
is used by all
scientists.

9. Why Metric?
Easy to use because:
1. It names units
systemmatically,
2. It uses multiples of 10.

10. 1 2 There are 2 parts to every measurement: 1. Number
2. Unit or Standard
of Measure
52 cm 1 2

11. Understanding Metric Prefixes
Symbol
Meaning
kilo k
Thousand
hecto h
Hundred
deka da
Ten
deci d
Tenth
centi c
Hundredth
milli m
Thousandth

12. Metric Line: This line will help you to convert easily. kilo hecto
deka
deci
centi
milli m l g
(meters, liters,
Grams)

13. Meter - Metric unit
of length
We use a metric tape,
meter stick, or ruler

14. balance or spring scale.
Gram - Metric unit of
mass
(Mass - is the amount of
matter in an object.)
We use a triple beam
balance or spring scale.

15. Liter - Metric unit of
liquid volume
We use a graduated
cylinder or beaker.

16. Degrees Celsius - metric unit to measure temperature
We use a thermometer.

17. When using the triple beam balance:
- Check that the pointer swings freely along the scale.
- Place the object to be massed on the pan.
- Move the riders along the beams beginning with the largest mass first.
- Make sure all riders are in the notch before reading.
- The mass of the object is the sum of the masses on the beams beginning with the largest.

18. Using the graduated cylinder or beaker:
The surface of liquids in glass cylinders is often curved. This curved surface is called the meniscus.
Always read a meniscus from the point of the curve.
Get eye level with the liquid to record an accurate reading.
Get eye level and read from bottom of curve.

19. Measurement
Lab
Students will accurately measure in SI unit to determine volume, area, mass, length, and temperature.

20. Procedure:
You will work in groups of two. Each person will need pen and lab sheet.
Begin at the station written on the top of lab paper and continue in order until you return to the station you began with.
You must decide which measuring instrument to use for each station. Refer to notes if you need to.
All measurement instruments are located in lab on cabinets.
Each measurement must have a number and unit.

21. Which metric unit would you use to measure the width of the window?
Review
Which metric unit would you use to measure the width of the window?
Meter
Which metric unit would you use to measure how much sugar to add to a recipe?
Gram
Which metric unit would you use to measure how much water to add to your kool-aid?
Liter

22. You may begin.
Remember do not round!
Accuracy is important!