Amaya 2.1 vocab

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Across
  1. 2. chemical reaction that gives of heat
  2. 4. the substance present before a chemical reaction
  3. 5. a chemical reaction that absorbs heat energy
  4. 7. a chemical reaction
Down
  1. 1. a chemical change
  2. 3. the result of chemical reaction
  3. 6. a change in matter
  4. 8. material that has mass