1. Earth Layers_ Composition

2. Crust 5 – 100 km thick Less than 1% of Earth’s mass
Temperature_ 0 C⁰ – 1,000 C⁰
It’s the thinnest layer of the Earth
Continental Crust_ made of oxygen, silicon, & aluminum
Oceanic Crust_ is denser
Oceanic Crust_ has twice as much iron, calcium and magnesium

3. Mantle It is 2,900 km thick Contains 67% Earth’s mass
Temperature_ 1,000⁰ C- 3,700⁰ C
Mantle rock pushes to surface
Ocean floor contains magma from underwater volcanoes
Contains more magnesium and less aluminum and silicon
Mantle is denser than crust

4. Outer Core 1/3 of Earth’s mass_ Temperature 3,700⁰ C – 7,000⁰ C
Radius is km
Made of iron
Has smaller amounts of nickel;
Almost no oxygen, silicon, aluminum or magnesium

5. Inner Core Solid layer of core Made of iron
Has smaller amounts of nickel;
Almost no oxygen, silicon, aluminum or magnesium