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Thursday, 16 June 2011

Layers of the earth

WALT-make a model of the layers of the earth out of play-dough.

So...that when we learn about natural disasters we can use our knowledge of the layers to understand them better.

To...help us in topic and science and learn about the earth around us.

The crust contains continents and seas.The thickness of the crust is 15-75km.

The next layer is the upper mantle.  It is 400km thick. It’s made out of iron, magnesium and silicates.

The lower mantle is more dense then the upper.  It is 2300km thick.

The outer core is a liquid.  It contains iron,nickel and sulphur.  The outer core is 2300km
deep.

The inner core is solid. It also contains iron, nickel and sulphur.  The inner cores temperature is 6650 degrees Celsius!

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