Chemical Reactions

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Across
  1. 5. a measure of how many particles are present in a volume of solution
  2. 7. substance that speeds up a chemical reaction but is not used up
  3. 8. the chemical name for burning
  4. 10. the chemicals at the end of a reaction
  5. 13. the chemicals at the start of a reaction
  6. 14. a biological catalyst
  7. 15. an example of an enzyme; found in saliva
Down
  1. 1. name of the chemical compound we call rust
  2. 2. physical change when a substance changes from liquid to gas
  3. 3. a solid produced from a reaction between two liquids
  4. 4. a measure of how quickly a reaction happens
  5. 5. when reactant particles 'bump into each other'
  6. 6. a measure of the heat energy of particles
  7. 9. the presence of these in a reaction shows a gas is released
  8. 11. the element that a substance reacts with when it burns
  9. 12. a new substance is ______ made in a chemical reaction