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Plate Tectonics
Junior Cycle Geography
Question | Answer |
---|---|
The Earth's outer skin, consisting of solid rock between 10km and 60km thick. | Crust |
At the centre of the Earth, made of nickle and iron with a temperature that reaches over 5000c. | Core |
Beneath the crust, a layer of molten and semi-molten rock called magma. | Mantle |
What the Earth's crust is broken into. | Plates |
Where plates collide, the heavier plates is forced downwards into the mantle where it melts. | Destructive boundary |
Where plates pull apart molten magma rises up from the mantle forming new crust. | Constructive boundary |
Where plates slide past each other, and occasionally get stuck. | Passive boundary |
Describes how the Earth's continents move about as passengers on the plates. | Continental drift |
The molten or semi-molten material that makes up the Earth's mantle. | Magma |
The movement of magma caused by the heating and cooling of the material as it moves away from the core. | Convection currents |
One large landmass formed when all the continents were connected. | Pangaea |