1. How do we measure things in science?
The Metric System
How do we measure things in science?

2. Length (measures the distance from one point to another)
Base Unit
Meter
Tool
Meter stick/ruler

3. Meter sticks

4. This lizard is 3 meters long!
(a meter is about 39 inches)

5. Volume (measures the amount of space an object takes up )
Base Unit
Liter
(liquids)
Cubic centimeters
(solids)
Tool
Graduated Cylinder (liquids)
Ruler (solids)

6. Graduated Cylinders
Measure the volume of liquids

7. Three steps to reading a graduated cylinder
Place the graduated cylinder on level surface
Read at eye level
Read from the bottom of the meniscus

9. Measuring volume of a solid
This solid is three cubic meters in volume. L x W x H = volume

10. Formula for finding the volume of a rectangular solid
Length x Width x Height
L x W x H

11. Finding the volume of an irregular object
1. Place enough water in a graduated cylinder to cover the object. Record the volume. 2. Add the object and record the new volume. 3. Find the difference between the two volumes and that is the volume of the irregular object.

13. Mass (measures the amount of matter in an object)
Base Unit
gram
Tool
Electric balance

14. Electronic balance used to measure mass

15. Steps before using a balance
Clean the weigh pan
Tare the balance (zero it out)

16. This stuff is supposed to give you more muscle mass

17. Temperature (measures heat and chill)
Base Unit
Degrees celcius
Tool
Thermometer

18. Both Celsius and Farenheit scales are seen here
Both Celsius and Farenheit scales are seen here. In science we do not use degrees Farenheit.

19. This man is in a freezing cold environment as can be seen by his frozen hair and beard. He is sitting in a natural hot spring that is very warm at the same time!

20. Density How closely the molecules of an object are packed together.
Density can be calculated if the mass and volume are known
Density = mass divided by volume

21. Measuring density using an electric balance for mass and a graduated cylinder for volume.

22. Less dense liquids
float on more dense liquids in this density column

23. Weight of an object
The mass of an object multiplied by the force of gravity.
Weight changes if gravity changes. (like on the moon)
Mass does not change on the moon.

24. Your weight will be less on the moon, but your mass does not change