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Card 6

Front

How do scientists believe the oceans were formed?

Back

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Card 7

Front

Describe two ways that the carbon dioxide levels in the early atmosphere were reduced.

Back

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Card 8

Front

What mineral is limestone made from?

Back

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Card 9

Front

How did photosynthesis affect the composition of the atmosphere?

Back

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Card 10

Front

State 3 ways humans changed the composition of the atmosphere.

Back

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Card 11

Front

What 2 main gases do volcanoes release in to the atmosphere

Back

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Card 12

Front

What effect does deforestation have on the amount of carbon dioxide in the atmosphere. Explain your answer.

Back

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Card 13

Front

Name an igneous rock

Back

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Card 14

Front

What are igneous rocks formed from?

Back

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Card 15

Front

What affects the size of crystals in in igneous rock?

Back

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