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The Earth:
The structure of the earth:
The Crust ­ the outermost layer of the earth is the coolest and thinnest.
The Mantle ­ this section has the properties of a solid but it is a very slow moving liquid rock.
Outer core ­ this is made from iron and…

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The early atmosphere was made up mainly of Carbon Dioxide with some water vapour and Nitrogen but
hardly any Oxygen.
Scientists look at the atmospheres of other planets like Mars and Venus to study what our atmosphere
might have been like 200 million years ago. They also look at ice…


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