1. Density of Earth Materials

2. What things are on the earth?
Water
Air
Soil
Rocks

3. Water! 73% of the Earth is covered in water Water’s density is 1 g/mL
Water is one of the biggest carriers and depositors of sediment.

4. Air
Air is made of gases, and gases are less dense than water. The density of the atmosphere is g/mL.
Gas
Percentage of atmosphere
Density
Nitrogen
78%
g/mL
Oxygen
21%
g/mL
Argon
.9%
g/mL
Carbon Dioxide
.04 %
g/mL
Lots of other gases
.06%
xxxxxxxxxxxxxxxxxx

5. Dirt
Kinds of dirt are determined by how big the particles are. These are numbered from largest to smallest.
1.Gravel: pieces are bigger than 2mm, feels coarse
2.Sand: pieces are mm, feels gritty
3.Silt: pieces are mm, feels like flour
4.Clay: pieces are smaller than .002, feels sticky when wet.

6. Dirt particle sizes

7. Rocks There are three main kinds of rock in the earth.
Igneous- come from volcanoes
Sedimentary- come from weathering
Metamorphic- rocks buried and squished inside the earth
Generally, rocks are more dense than water

8. Rocks
Rocks that are more dense generally were formed deeper in the earth.
You can identify types of rock from their densities.

9. Layers of the Earth
Earth gets more and more dense nearer to the center.
Atmosphere : g/mL
Continental Crust: 2.7 to 3.0 g/cm3
Oceanic Crust: 3.0 to 3.3 g/cm3
Mantle (silicates): 3.3 to 5.7 g/cm3
Outer Core (liquid): 9.9 to 12.2 g/cm3
Inner Core (solid): 12.6 to 13.0 g/cm3