1. 4.5 Measuring Matter: Mass, Weight, and Volume
Text pages

2. 4.5 Overview Key idea Vocabulary Explain the concept of force
Determine the density of a variety of substances
Mass
Weight
Volume
Meniscus
Displacement

3. What is matter Something that has a mass and volume
If it is not matter… it is energy

6. What is the difference between mass and weight?

7. Mass = the amount of matter in an object
grams, g; milligrams, mg; kilograms, kg
Mass is always the same

8. Weight= the force of gravity pulling on the object
Weight is different depending on the planet!
Gravity keeps things on the ground, it is the Earths pull
The pull of gravity is measured in Newtons, N

11. If I travelled to the moon, would I lose weight?
YES, because the moon has a different gravity/pull than on Earth… you are pull down on less on the Moon!
9.8 m/s2 = Earths gravitational pull
1.6 m/s2 = Moons gravitational pull
Your mass will always be the same…. You will always have the same amount of stuff inside of you!!

12. Does your bathroom sale measure mass or weight?
It measures the Earth’s pull on your body!

13. What is Volume The amount of “space” that an object takes up = outside
Capacity= The amount of space in a substance (like a tube, juice container, tube of tooth paste) = inside
Meters cubed, m3; centimeters cubed, cm3; liters, L; millilitres, mL

14. Volume is measured in many different ways
Liquids:
Measured by observing how much of a container they fill up
Beaker, graduated cylinders (GC), measuring cup
Units = mL, L, kL

16. Regular shaped objects (straight edges, cubes, rectangles)
Use a ruler
Volume = L x W x H
Units = m3, cm3

17. (volume of water + object) – (volume of water)
Small irregular shaped objects (rocks…)
Displacement:
Choose a container that the object can fit in
Fill up with water till half full
Record the volume
Add the object
Record the volume again
Subtract the two volumes = volume of object
This is the amount of space the object took up!
Volume of object =
(volume of water + object) – (volume of water)
* larger number * smaller number

19. Large irregular shaped objects
Overflow method
Need an overflow can and a GC
Fill overflow can till water starts to come out of spout, place GC under overflow spout
Add object to over flow container
Record how much water is in the GC
The water that overflowed into the GC = the amount of space the object took up

20. Which method is which?

21. Which method would you use?

22. If you travelled to the moon, would my volume change?
NO, you will still take up the same amount of space….