Crossword Puzzle: Chapter 6: Chemical Change

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Across
  1. 4. A solid that forms when two liquids are mixed together during a reaction.
  2. 5. A reaction that absorbs energy, causing the temperature to decrease.
  3. 10. A reaction that releases energy, causing the temperature to increase.
  4. 12. A substance with a pH lower than 7.
  5. 13. A substance with a pH higher than 7.
  6. 14. The law stating that matter cannot be created or destroyed during a reaction.
  7. 15. A rapid chemical reaction between a fuel and oxygen that produces fire and heat.
Down
  1. 1. A substance, like cabbage juice, that changes color to show if a liquid is an acid or a base.
  2. 2. The starting substances in a chemical reaction.
  3. 3. The large number in front of a chemical formula that shows how many molecules are present.
  4. 6. A substance with a pH of exactly 7, like pure water.
  5. 7. A substance that speeds up a chemical reaction without being used up itself.
  6. 8. What atoms do during a chemical reaction to form new products.
  7. 9. The new substances created during a chemical reaction.
  8. 11. A biological catalyst that helps reactions happen inside the human body.