More cards in this set

Card 6

Front

Our modern atmosphere is mostly....

Back

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Card 7

Front

21% of atmosphere is....

Back

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Card 8

Front

The atmosphere used to be mostly....

Back

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Card 9

Front

Crude oil contains....

Back

Preview of the front of card 9

Card 10

Front

Breaking something down with electricity is called....

Back

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Card 11

Front

When something can be dissolved in water it is....

Back

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Card 12

Front

The state symbol aq means....

Back

Preview of the front of card 12