1. Mass, Volume & Density
8th Grade Science

2. What is Mass? -The amount of matter an object has.
-Unit of measurement = kg or g
-What tool do we use to find mass?

3. What is Volume? -The quantity of space an object occupies.
-Unit of measurement = ml or cm3
so which one do you use when?
-What tools can we use to find volume?

4. Finding Volume of a Regular Shaped Object
-Volume of a cube = L x W x h
-Volume of a cylinder = πr2h
-Volume of a sphere = 4πr3 3
Let’s practice! Cube: 2 cm L, 2 cm W, 2 cm h

5. Finding Volume of an Irregular Shaped Object
-Can’t use a ruler!!!
-Find volume by water displacement method.
-Volume of water with object – volume of water before object
-Don’t forget to read the graduated cylinder from the bottom of the meniscus!!!

7. What is Density?
-How much mass is contained in a given volume. -Equation: density = mass ÷ volume d=m/v -What would the unit of measurement be? You have to represent both measurements! g/ml or g/cm3

8. Why is Density Important?
Building Ships
Airplanes
Pipe Systems
Oil Spills

9. Why is Density Important?
-Every element has its own unique density. How could that help?