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Card 16

Front

How does the carbon cycle work? (2)

Back

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Card 17

Front

How does the nitrogen cycle work?

Back

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Card 18

Front

What is nitrogen fixation?

Back

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Card 19

Front

What are the four different types of bacteria involved in the nitrogen cycle?

Back

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Card 20

Front

What is carbon monoxide?

Back

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Card 21

Front

What is a catalytic converter?

Back

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Card 22

Front

What is acid rain caused by?

Back

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Card 23

Front

Why does acid rain kill fish and tress?

Back

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Card 24

Front

How do greenhouse gases trap heat from the Sun?

Back

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Card 25

Front

How does human activity produce lots of greenhouse gases?

Back

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