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Card 6

Front

what are producers and consumers?

Back

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Card 7

Front

What is excretion and egestion?

Back

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Card 8

Front

What does a pyramid of numbers show?

Back

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Card 9

Front

What does a pyramid of biomass show?

Back

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Card 10

Front

what is the definition of the carbon cycle?

Back

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Card 11

Front

Name a process which returns carbon to the air?

Back

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Card 12

Front

Name a process that removes carbon from the air?

Back

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Card 13

Front

why do scientists want to save endangered species?

Back

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Card 14

Front

why do dead plants decompose in marshes?

Back

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Card 15

Front

What does nitrogen fixing bacteria do?

Back

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