Science1

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  • Created by: danni123
  • Created on: 07-06-13 11:08
The earth was formed when a molten mass of material cooled down over a period of millions of years
The earth is nearly spherical with a layered structure
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The atmosphere is a layer of gases (about 100km thick) above the crust, consisting mainly of nitrogen and oxygen
The earth’s crust varies in thickness from 5km under the oceans to 70km under the continents
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The mantle is under the crust
This layer is much thicker, nearly 3000km thick
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The mantle behaves like a solid, but it can flow in parts very slowly
The earth’s core is in the centre, and is about half the radius of the earth
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It is made of a mixture of two magnetic metals nickel and iron
The outer core is a liquid while the inner core is a solid
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It is important to remember that the earth’s crust, the atmosphere and the oceans are the only source of minerals and other resources that humans need
The outer part of the earth is called the lithosphere, which includes the crust and the upper part of the mantle
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Other cards in this set

Card 2

Front

The atmosphere is a layer of gases (about 100km thick) above the crust, consisting mainly of nitrogen and oxygen

Back

The earth’s crust varies in thickness from 5km under the oceans to 70km under the continents

Card 3

Front

The mantle is under the crust

Back

Preview of the front of card 3

Card 4

Front

The mantle behaves like a solid, but it can flow in parts very slowly

Back

Preview of the front of card 4

Card 5

Front

It is made of a mixture of two magnetic metals nickel and iron

Back

Preview of the front of card 5
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