1. Density #1-3

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: People in a square How about this: Which square is more dense?

4. Which one is more dense? Demonstration: People in a square

5. Which one is more dense? Now which one is more dense?

6. Which one is more dense? Now which one is more dense?

7. What is density? Density = mass OR mass ÷ volume. volume Units for density: g. cm 3 ALWAYS REMEMBER UNITS!

8. Let’s try a density problem together Frank has a paper clip. It has a mass of 9g and a volume of 3cm 3. What is its density? Mass/Volume= 9g/3cm 3 = ???? Frank also has an eraser. It has a mass of 3g, and a volume of 1cm 3. What is its density? Mass/Volume= 3g/1cm 3= ????

9. Let’s try a density problem together Frank has a paper clip. It has a mass of 9g and a volume of 3cm 3. What is its density? Mass/Volume= 9g/3cm 3= 3g/cm 3 Frank also has an eraser. It has a mass of 3g, and a volume of 1cm 3. What is its density? Mass/Volume= 3g/1cm 3 = 3g/cm 3

10. Work on these problems with your neighbor. Jack has a rock. The rock has a mass of 6g and a volume of 3cm 3. What is the density of the rock? Jill has a gel pen. The gel pen has a mass of 8g and a volume of 2cm 3. What is the density of the rock?

11. Work on these problems with your neighbor. Jack has a rock. The rock has a mass of 6g and a volume of 3cm 3. What is the density of the rock? Mass/Volume= 6g/3cm 3= 2g/cm 3 Jill has a gel pen. The gel pen has a mass of 8g and a volume of 2cm 3. What is the density of the rock? Mass/Volume= 8g/2cm 3= 4g/cm 3

12. Now, try these on your own. Al’Licia has a watch. It has a mass of 4g and a volume of 2cm 3. What is the density of the watch? Mia has a wallet. It has a mass of 15g and a volume of 5cm 3. What is the density of the wallet?

13. Now, try these on your own. Al’Licia has a watch. It has a mass of 4g and a volume of 2cm 3. What is the density of the watch? Mass/Volume= 4g/2cm 3= 2g/cm 3 Mia has a wallet. It has a mass of 15g and a volume of 5cm 3. What is the density of the wallet? Mass/Volume= 15g/5cm 3= 3g/cm 3