More cards in this set

Card 6

Front

what evidence do we have for this?

Back

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Card 7

Front

how was oxygen produced? (through what reaction)

Back

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Card 8

Front

CO2 was used during photosynthesis to make glucose. some of this glucose got trapped in biomass that transformed to fossil fuels from heat and pressure. give examples of the fossil fuels

Back

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Card 9

Front

Algae formed in the sea. How did this impact carbon dioxide & Oxygen levels?

Back

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Card 10

Front

How else was CO2 decreased?

Back

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Card 11

Front

How were Nitrogen levels increased?

Back

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Card 12

Front

What did methane /ammonia react with to be removed from atmosphere?

Back

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Card 13

Front

How do humans contribute to climate change?

Back

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