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