Restless Earth

The earth is seperated into 3 main parts:

The Lithosphere

• The Continental Crust-solid, made of rocks which cool below the surface such as granite.
• The Oceanic Crust- Solid, and made up of rocks which cool above the surface such as basalt.
• The Upper Mantle- This layer is made of ultrabasic minerals, and is solid.

The Mantle

• Asthenosphere- Partially molten layer made of peridotites.
• Lower Mantle- Solid layer made of silica based minerals.

The Core

• Outer core is liquid, very dense; and made of iron/nickel.
• Inner core is solid, very dense, and made of iron/nickel.
  

Convection currents occur when magma in the mantle is heated up from the radioactive decay in the core…