RESTLESS EARTH KEY TERMS

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Mantle- a thick layre of molten rock between the crust and the core.

crust- the outer layer of the earth, very thin (ranges from 6km-70km)

outer core- a layer of liquid iron around the inner core

inner core- centre of the earth, hottest part of the planet. it is a solid ball of iron.

tectonic plates- the earth's crust is made up of plates, always moving

oceanic crust - carries water

continental crust- carries land

plate boundary- where two plates meet

destructive margin- when one plate sinks under another (seduction)

constructive margin- two plates away from each other

conservative margin- plates move past each other

collision margin- when plates move towards each other

fold mountains- large mountains ranges when rock layers have been crumpled as they have been forced together.

anticline- up folds

syncline- down

over folds- folds in a mountain that have been pushed to one side,

ocean trench- deep section of the ocean

volcano- a coned shaped mountain formed by surface eruption from a magma chamber inside the earth.

crater- a funnel shape hollow at the top of the volcanic core

volcanic bombs- lumps of molten rock that solidify as they fall

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