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Air by Kallen

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Across
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Does air have colour?
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Which plant gives oxygen at night?
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What is 0.9% of air made up of?
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Air is used by humans in the _________ process
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When we exhale, we mostly breathe out ______________
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Who named oxygen?
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What is 78% of air made up of?
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What is 21% of air made up of?
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When air is moving fast its called _________
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What city has the most air pollution in the world in 2020
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Air has no ______
Down
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_____ give of air
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Air has no ______
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What planet besides Earth has air?
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A type of ________ can live without oxygen
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What is 0.4% of air made up of?
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What is 1% of air made up of?
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What is the #1 plant for air purifying?
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Does air have weight?
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What city has the cleanest air in the world in 2020