1. Earth’s Layers

2. Crust 6-70 km thick Very light; only 1% of Earth’s total mass
Made up of rock
Two types of crust
Oceanic
All of the ocean floors
Continental
Includes all continents and islands

3. Mantle Thickest layer of Earth 2900km thick 64% of Earth’s mass
Made of hot rock that is less dense than the core
degrees Celsius

4. Outer Core Composed of liquid iron and nickel 2300km thick
Temperature and pressure here are lower than in the inner core; that is why this layer is a liquid
degrees Celsius

5. Inner Core Solid layer of nickel and iron
High temperature and pressure
2400km in diameter
degrees Celsius

6. Lithosphere
Earth’s crust and the top of the mantle

7. Asthenosphere Under the lithosphere
Softer and hotter rock is located here