1. Mass, Volume & Density 8 th 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 cm 3 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 = πr 2 h -Volume of a sphere = 4πr 3 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/cm 3

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?