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Chemical Reactions

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