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- 1—At the centre of the earth is a ball of solid iron and nickel called the core.
- 2—Around the core is the mantle, which is semi molten rock and moves very slowly.
- 3—The outer layer of the earth is called the crust. It is very thin (about 20km).
- 4—The crust is divided into slabs called tectonic plates (these float on the mantle).
- 5—Plates are made of two types of crust: Continental and Oceanic
~Continental crust is thicker and less dense.
~Oceanic crust is thinner and more dense.
- 6—The plates are moving because of the rock in the mantle underneath them is moving.
- 7—The place where plates meet are called boundaries of plate margins.
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- Fichas sobre Sin título, creado por hannah.dempsey2 el 02/02/2014.
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- hannah.dempsey2
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