1. Density

2. What is It? Derived unit which shows the mass per unit of volume More dense materials are “heavier” than less dense materials Density compares mass without variable of size

3. Units of Density For liquid or gas - g/ml For solid – g/cm 3

4. Every Material Has A Unique Density Lead 11.35 g/cm 3 Granite 2.70 g/cm 3 Water 1.00 g/ml Ice.91 g/cm 3 Cork.24 g/cm 3

5. Sink or Float Substances less dense than water float More dense than water they sink

6. Example 1 What is the density of alum with a volume of 4.00 cm 3 and a mass of 10.8 g?

7. Example 2 A piece of quartz has a volume of 30. cm 3. The density is 2.65 g/ cm 3, what is the mass?

8. Example 3 Bone has a density of 1.85 g/ cm 3, what is the volume of a 55g bone?