Year 7 Crossword Puzzle - Chapter 5 (Part 2)

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Across
  1. 2. This indicator can only show if a substance is an acid or an alkali.
  2. 3. A substance that can catch fire easily.
  3. 6. A substance that can cause harm such as irritating your skin and eyes.
  4. 9. A substance that gives off a large amount of heat when in contact with other substances.
  5. 12. A substance that can destroy living tissue and cause burns.
  6. 13. A process that occurs when acids and alkalis mix together. Acids and alkalis are chemical opposites. (Hint: The mixture becomes neutral)
Down
  1. 1. Sodium hydroxide is an __________.
  2. 4. A substance that can explode if it comes into contact with a flame or heat.
  3. 5. We can know the pH of a substance by using ___________ indicator.
  4. 7. Citric fruits are ________.
  5. 8. Adding water to spilled acids will make it less harmful because the acid becomes _______.
  6. 10. A substance that can poison you.
  7. 11. Strong acids are ________.