Chemical Reactions

123456789
Across
  1. 2. The smallest building blocks of matter.
  2. 5. The starting ingredients in a chemical reaction.
  3. 6. A change in size, shape, or state but no new substance is made.
  4. 7. Two or more atoms joined together.
  5. 8. A person who designs and builds things using chemistry.
  6. 9. The substances made in a chemical reaction.
Down
  1. 1. A change that makes a new substance.
  2. 3. A person who studies and creates new materials.
  3. 4. A substance that speeds up a reaction.
  4. 6. The special features of a substance, like color or hardness.