Restless world

The Earth

Composition

Lithosphere

 - uppermost layer of the earth

 - solid

 - 900 degrees

 - Continental crust

    - granite

    - forms continents

    - low density

    - cant sink

    - 30-50km thick

 - Oceanic crust

   - Basalt

   - forms ocean floor

   - denser than continental crust

   - 6-8km thick

   - can sink

Mantle

 - plastic solid

 - denser than lithosphere

 - Asthenosphere is the top layer of the mantle

 - about 900km thick

 - thickest layer of the earth

 - 1600-4000 degrees

Core

 - outer core is liquid

 - inner core is solid (too much pressure to be anything else)

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