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

4. Density a. Example: g/mL
The measure of how much mass is in a given volume
Density = Mass/Volume
Density has 2 measurements so it has 2 units
a. Example: g/mL

5. Properties of Earth’s Layers
Another interesting property of earth layers is the state of matter that scientists believe exists at different depths.
Maybe the solid earth is not so solid, through and through!
One layer is thought to be molten.
Another layer is thought to be solid yet under enough heat and pressure such that the solid rock "flows."