1. Density

2. What is density? Density is a comparison of how much matter there is in a certain amount of space.

3. Which one is more dense? Demonstration: Atoms in a square How about this: Which square is more dense? Box 1Box 2

4. Which one is more dense? Now which one is more dense? Box 1 Box 2

5. Density Formulas Density = mass volume Mass= Density * Volume Volume = Mass Density

6. Density Graph

7. Problem #1 Frank has a paper clip. It has a mass of 2000g and a volume of 25 ml after conducting the water displacement test. What is its density? D= M= V= 2000g 25 ml ? D= 2000g 25 ml 80 g ml

8. Problem #2 Frank also has an eraser. It has a mass of 28g, and a volume of 4cm 3. What is its density? D= M= V= 28g 4 cm ? D= 28g 4 cm 7 g cm 3 3 3

9. Problem #3 Jack has a rock. The rock has a density of 6g/cm and a volume of 3 ml after conducting a water displacement test. What is the mass of the rock? 18g 6 g ml * 3ml D= M= V= 6 g ml 3ml ?

10. Problem #4 Jill has a gel pen. The gel pen has a mass of 8g and a density of 2 g/cm 3. What is the volume of the gel pen? M= D= V= 8g 2g/cm 3 ? V= 8g 2g/cm 3 4 cm 3