Changes Around Us

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Across
  1. 4. In a chemical reaction the original substances present
  2. 5. A process where a new substance is formed
  3. 7. Becoming liquefied by heat is called ____________
  4. 8. A process that occurs when iron comes in contact with moist air
Down
  1. 1. A process where the molecules remain the same before and after the reaction
  2. 2. The new substance formed in a chemical reaction
  3. 3. Increase of size is called ______________
  4. 6. A substance that does not undergo any changes in a chemical reaction