Chemical reactions

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Across
  1. 1. the amount of particles in a certain volume
  2. 5. this is used to measure volume of gas
  3. 6. what does the arrow in a word equation mean?
  4. 9. the substances made in a chemical reaction
  5. 10. heat is a form of this
  6. 12. this can change in some chemical reactions
  7. 13. speeds up a reaction but is not used up
  8. 15. seen as bubbles/ fizzing during a reaction
Down
  1. 2. what particles must do to react
  2. 3. this is measured using a thermometer
  3. 4. the starting substances in a reaction
  4. 7. scientific term for burning
  5. 8. solid formed from two liquids
  6. 11. what all substances are made up of
  7. 14. a form of energy you can see in a reaction