Kelsy's crossword

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Across
  1. 5. changes the rate of the chemical reaction without being used up very much
  2. 7. a solid that is produced as a result of a chemical reaction in a solution
  3. 8. a substance or molecule that participates in a chemical reaction
Down
  1. 1. a chemical relation in which heat is released to the surroundings
  2. 2. A substance that slows or stops a chemical reaction
  3. 3. reaction A chemical reaction that requires heat
  4. 4. of conservation of mass mas can not be created or destroyed in ordanary chemical and physical changes
  5. 5. reaction one or more substances change to produce one or more different substances
  6. 6. energy A minimum amount of energy required to start a chemical reaction
  7. 7. a substance that forms in a chemical reaction