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Card 6

Front

What produced the gases present in Earth's early atmophere?

Back

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Card 7

Front

Which gases were present in Earth's early atmosphere?

Back

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Card 8

Front

By what process do algae and plant's produce Oxygen?

Back

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Card 9

Front

Write the word equation for Photosynthesis?

Back

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Card 10

Front

How did the worlds Oceans form?

Back

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Card 11

Front

Why have theories about Earth's early atmosphere developed and changed over time?

Back

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Card 12

Front

How did the Oceans reduce atmospheric levels of Carbon Dioxide in Earth's early atmosphere?

Back

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Card 13

Front

How did algae and plants reduce levels of Carbon Dioxide in Earth's early atmosphere?

Back

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Card 14

Front

What was formed when shells of organisms made using dissolved Carbon Dioxide, fell to the bottom of the Ocean and were covered and compressed?

Back

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Card 15

Front

What was formed when plants grew millions of years ago, died and were trapped and compressed under rocks?

Back

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