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Chemistry
Evolution of the atmosphere

Volcanoes gave out gases

1. The Earths surface - molten for millions of years until the Earth cooled and the crust formed. Volcanoes
kept erupting.
2. The volcanoes gave out lots of gas. This was how the oceans and atmosphere formed
3. The early atmosphere…

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1. The plant material is crushed
2. The crushed plant material is pressed between metal plates and the oil is squashed out
3. Oil can be separated from crushed plant material by a centrifuge OR solvents can be used to get oil
from plant material
Distillation refines oil and removes…

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