thomas vocab 2.1

12345678
Across
  1. 2. thermal reaction
  2. 4. the substances present before
  3. 5. a chemical reaction
  4. 7. a chemical reaction
Down
  1. 1. a chemical change
  2. 3. the substances that are formed
  3. 6. a change in matter
  4. 8. material that has mass