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

3. Thickest layer of Earth Thickest layer of Earth 2900km thick 2900km thick 64% of Earth’s mass 64% of Earth’s mass Made of hot rock that is less dense than the core Made of hot rock that is less dense than the core 870-4400 degrees Celsius 870-4400 degrees Celsius

4. Composed of liquid iron and nickel Composed of liquid iron and nickel 2300km thick 2300km thick Temperature and pressure here are lower than in the inner core; that is why this layer is a liquid Temperature and pressure here are lower than in the inner core; that is why this layer is a liquid 4400-6100 degrees Celsius 4400-6100 degrees Celsius

5. Solid layer of nickel and iron Solid layer of nickel and iron High temperature and pressure High temperature and pressure 2400km in diameter 2400km in diameter 7000-8000 degrees Celsius 7000-8000 degrees Celsius

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

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