Chemical vs Physical

1234567
Across
  1. 3. A change in size, shape, or state but no new substance is made.
  2. 6. A substance that makes a reaction happen faster.
  3. 7. A substance that helps fuel burn.
Down
  1. 1. A gas we breathe out and plants use.
  2. 2. A change that makes a new substance.
  3. 4. The lightest element, found in water.
  4. 5. The forms matter can take, like solid, liquid, or gas.