1. Density Overview

2. What is the density of oil? A) Less than 1 g/cm 3 B) Equal to 1 g/cm 3 C) Greater than 1 g/cm 3 1 cm 1 g

3. What is Mass? How much stuff (matter) an object has Measured in grams

4. What is Volume? Amount of space an object takes up Measured in cm 3

5. Calculating Volume Volume = L x W x H = 2 x 2 x 2 = 8 cm 3 2 cm 8 Cubic Centimeters!

6. Density is… Mass per unit Volume Which is denser? 2 identical fish tanks with pollywogs in each.

7. Mass Volume Important Density = 3

8. Calculating Density Density = Mass/Volume = 24/8 = 3 g/cm 3 2 cm 24 g

9. Water has a density of… 1 gram/cubic centimeter = 1 g/cm 3 = 1 g/ml What is the mass of 2 L? 2000 grams!

10. What is the density of oil? A) 1 g/cm 3 B) 1.1 g/cm 3 C) 0.97 g/cm 3 D) 3.2 g/cm 3

11. Review 1. Why does a cube of ice float in water?

12. Water versus Ice Water

13. Question 1 2 g10 g20 g Three cubes have the same volume, but very different densities. Which cube has the greatest density?

14. Question 2 12 g Three cylinders have the same volume, but very different densities. Which cylinder will displace the most water when submerged? Or will each cylinder displace the same volume of water? 32 g 8 g

15. Review Which is denser? Both boxes have the same volume.

16. What is the density of the ship?

17. Review Which one is more likely to float in H 2 O? Both boxes have the same volume.

18. Does cutting change density? No! The ratio of mass to volume remains constant. Both mass and volume change proportionally. 20/4 = 5 g/cm3 10/2 = 5 g/cm3 5/1 = 5 g/cm3

19. Density Overview