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Card 16

Front

A pyramid of biomass

Back

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Card 17

Front

Egestion

Back

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Card 18

Front

Nutrient Cycling

Back

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Card 19

Front

How does water move through the atmosphere?

Back

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Card 20

Front

How are clouds formed?

Back

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Card 21

Front

Precipitation

Back

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Card 22

Front

How is nitrogen removed from the air?

Back

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Card 23

Front

How is nitrogen returned to the air?

Back

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Card 24

Front

How is ammonia converted to nitrates?

Back

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Card 25

Front

The carbon cycle

Back

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