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Plate tectonics
Question | Answer |
---|---|
Inner core | The inner core is 1,200 km thick and makes up the very centre of the Earth. |
Outer core | The outer core is 2200 km thick and surrounds the inner core. |
Mantle | The mantle is 2900 km thick and is the middle layer of the earth. |
Endogenic forces | Forces from within the earth that cause the crust to move vertically or horizontally. Convection currents are mainly responsible for endogenic forces. |
Asthenosphere | 100 - 200 km thick section of the mantle |
Lithosphere | Solid part of the upper mantle and the crust combined |
Moho line | The boundary that divides the solid upper mantle and the Earths crust |
Continental crust | Land |
Oceanic crust | Oceans and seas |
Magma | Liquid rock |
Semi-molten | Half liquid and half solid |