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Card 6

Front

How were fossil fuels formed?

Back

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Card 7

Front

How were sedimentary rocks formed?

Back

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Card 8

Front

How have ideas of the composition of the atmosphere changed over time?

Back

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Card 9

Front

Give 3 examples of pollutants that are harmful to our health.

Back

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Card 10

Front

Which dioxides cause acid rain?

Back

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Card 11

Front

What does carbon dioxide cause?

Back

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Card 12

Front

What increases the gas levels in the atmosphere?

Back

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Card 13

Front

How is the amount of gas in the air measured?

Back

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Card 14

Front

What are hydrocarbons? What do they contain?

Back

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Card 15

Front

Give the word equation for hydrocarbons burning.

Back

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