Across
- 2. A factor that measures some properties.
- 5. Reaction A chemical reaction in which heat energy is released.
- 6. A substance that speeds up a chemical reaction but isn't a permanent change.
- 8. Substance that forms as a result of a chemical reaction.
- 9. reaction A process that produces chemical change, resulting in new substances.
Down
- 1. A substance that exists before a chemical reaction begins.
- 3. A substance that slows down a chemical reaction.
- 4. A letter or number that is printed slightly below or the side of another character.
- 6. equation A symbolic representation of a chemical reaction.
- 7. Reaction A chemical reaction in which heat energy is absorbed.