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8 Cards in this Set
- Front
- Back
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The current compotition of the earth's atmosphere is ... |
70% nitrogen (unreactive) 21% oxygen (respiration, combustion) 1% CO2, Ar, H2O (other gases) |
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How old is the earth? |
Around 4,500,000,000 years old |
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What was the first atmosphere made up of? |
Carbon dioxide and water vapour from volcanoes around the size of britain |
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How long did it rain to cause seas and oceans? |
Hundreds and thousands of years |
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What happened to the carbon dioxide |
It dissolved into the seas and oceans or plants or algae started to grow starting life on earth. They began doing photosynthesis. causing the CO2 levels to shrink |
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What is the equations for photosynthesis? |
CO2 +H20 ---', C6H12O6 +O2 carbon + water ---', glucose + oxygen Dioxide |
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Plants and animal bonds |
Without plants there would be no animals with no animals no plants Respiration: Glucose + oxygen ---', carbon + water Dioxide |
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What places have been destroyed by volcanoes? |
Pompiay and hurculanum |
