1. Chapter 10
Density

2. Density
Density: how much mass is in a given volume of material

3. Same volume, different mass!
Which is more dense?
Styrofoam ball or Steel ball
Same volume, different mass!

4. Density - solids, liquids, and gases all have density
- density is independent of quantity or shape

5. Decrease Density of Same Material
How can this ship float?
Aluminums density = 2.7 g/mL
If you change the shape of the material, the volume changes therefore, you can get objects to float!

6. Density of Common Materials
Liquids tend to be less dense than solids of the same material.
Water is an exception:
The density of solid water (ice) is
less than liquid water.
Density Facts

7. Why is density different?
Density changes for different substances because:
1. Atoms have different masses.
2. Atoms may be “packed” tightly or loosely.

8. Density Columns
In a density column, substances separate based on their density
Highest density (most dense) on the bottom
Lowest density on top
1 g/mL

9. Calculating Density Mass (g) Density (g/mL or g/cm3) Volume
(mL or cm3)
Units of density:
- liquids: g/mL
- solids: g/cm3