Oxidation

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Across
  1. 3. A chemical reaction where a substance combines with oxygen and changes into something new.
  2. 6. A special protein that helps chemical reactions happen faster (like in apples).
  3. 7. The reddish-brown substance formed when iron reacts with oxygen.
  4. 8. A substance (like lemon juice) that slows down or prevents oxidation.
  5. 9. The green layer that forms on copper after it reacts with oxygen over time.
  6. 10. A dull or dark coating that forms on metal due to oxidation.
Down
  1. 1. Area The amount of exposed outer area of an object; more surface area means faster oxidation.
  2. 2. A reddish metal that turns green when it reacts with oxygen (like the Statue of Liberty).
  3. 4. A gas in the air (O₂) that reacts with many materials and causes oxidation.
  4. 5. Change A change that forms a new substance with different properties.
  5. 7. A process where substances change into new substances.