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Card 16

Front

Why do you have unusually shaped pyramids of numbers?

Back

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Card 17

Front

What does a pyramid of biomass show?

Back

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Card 18

Front

Name 3 ways in which energy is lost in the food chain

Back

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Card 19

Front

What is the formula for effciency?

Back

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Card 20

Front

Name 3 ways in which carbon dioxide is put back into the atmosphere

Back

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Card 21

Front

What conditions do microbes need to survive?

Back

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Card 22

Front

What is carbon sink?

Back

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Card 23

Front

How does nirtogen exsist in the soil?

Back

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Card 24

Front

How are nitrates absosrbed by plant roots?

Back

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Card 25

Front

How does nitrogen get passed on to animals?

Back

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