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Geography

Tectonic plates

A plate boundary is the point where two plates meet. This is where earthquakes and volcanoes are most likely to occur. Watch this video to find out more.

Video

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Key points

  • The inner core is in the centre and is the hottest part of the Earth. It is solid and made of iron and nickel.
  • The outer core is a liquid layer, also made of iron and nickel.
  • The mantle is the largest layer. It is made of semi-molten rock called magma. It is hard in the upper parts, but beginning to melt lower down.
  • The crust is the outer layer of solid, thin rock on which we live.
  • There are two different types of crust: continental crust, which carries land, and oceanic crust, which carries water.
  • These crusts are broken up into pieces called plates.
  • The point where two plates meet is called a plate boundary. This is where earthquakes and volcanoes are most likely to occur.

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