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Across
  1. 1. The popping sound made when hydrogen burns in the presence of oxygen.
  2. 2. A state of matter with a fixed volume but no fixed shape.
  3. 3. This is another way to say heat.
  4. 5. A colourless, odourless gas that relights a glowing splint.
  5. 6. A starting substance in a chemical reaction
  6. 7. A colourless, odourless gas that burns with a squeaky pop.
  7. 10. A small wooden stick used to test for gases in experiments.
  8. 11. A chemical reaction in which one compound breaks down into two or more simpler substances
  9. 13. Limewater will turn this colour if carbon dioxde is present.
Down
  1. 1. A state of matter with a fixed shape and fixed volume.
  2. 2. We use this to test for carbon dioxide.
  3. 4. A reaction in which a substance gains oxygen.
  4. 8. A reaction in which a substance loses oxygen.
  5. 9. A state of matter with no fixed shape or volume.
  6. 12. A substance that is made in a chemical reaction.