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Chemical Reactions

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Across
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Strong and long-lasting.
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Rocks that include metals and other substances.
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Method of testing acids and bases.
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Substances in food that cure diseases.
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Medicines that kill bacteria.
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Wearing away by water or chemicals.
Down
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A danger or risk.
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Antibiotic discovered by accident.
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Discovered Penicillin
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Crude oil.
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To break down.
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A large molecule made up of many identical smaller units.
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Killing germs, primarily in drinking water.