Hannahs crossword

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Across
  1. 2. water, sun, air, gas, solids, people
  2. 8. change boiling an egg and baking a cake
  3. 10. the amount of space occupied by a sample of matter
  4. 11. source of nuclear energy
  5. 13. amount of matter in an object
  6. 14. the release of heat
  7. 15. the measure of hotness of coldness
  8. 17. Carbon, hydrogen, helium, oxygen
Down
  1. 1. A substance that takes part and undergoes change in a reaction
  2. 2. a substance made by mixing other substances
  3. 3. an action performed or feeling experienced
  4. 4. digestion, combustion, and cutting an onion
  5. 5. the warmth of the sun and baking in the oven
  6. 6. a substance that increases the rate of a chemical reaction without causing permanent damage
  7. 7. water molecules
  8. 9. property
  9. 12. the strength and ability needed to undergo physical and mental activity
  10. 16. electronics, food, airlines,clothing, and beverages