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Card 6

Front

Why is humus (partly decomposed animal and plant waste) important to living organisms?

Back

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Card 7

Front

What do earthworms do in soil to improve structure and fertility?

Back

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Card 8

Front

How does draining and aerating soil help some organisms?

Back

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Card 9

Front

Why is neutralising soil important?

Back

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Card 10

Front

Who was the first person to understand the importance of earthworms?

Back

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Card 11

Front

What are the advantages of living in water?

Back

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Card 12

Front

What are the disadvantages of living in water?

Back

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Card 13

Front

Explain what might happen to organisms in freshwater and salt water.

Back

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Card 14

Front

Describe how a contractile vacuole controls excess water

Back

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Card 15

Front

What are phytoplankton and zooplankton?

Back

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