WPS Presentation

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CRUST

INNER CORE

MANTLE

OUTER CORE

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CRUST

- it consists of all kinds of rocks, soil and everything you see above the Earth’s surface. - almost three times thicker than the crust under the oceans - it extends to about 25 miles - the Earth’s crust floats on this layer called Mantle.

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MANTLE

- it is made of thick, solid, rocky substance amounts toabout 85% of the total mass of the Earth. - the first 50 miles of the mantle consist of very hard, rigid rocks.

- the next 150 miles are made of super-hot solid rocks. - for the next several hundred miles, the Earth’s mantle is believed to be made up of very solid and sturdy rock materials. - the mantle is about 1800 miles thick and by far the largest layer of the Earth.

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OUTER CORE

- made up of super hot liquid molten substance called lava. - this lava is believed to be mae of iron and nickel. - it extends to a depth of 3000 miles beneath the Earth’s surface

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INNER CORE

- extends another 900 miles towards the center of the Earth. - is a solid ball made of iron and nickel. - hottest part of the Earth, as hot as the surface of the sun.