Across
- 5. a reaction that releases energy in the form of heat
- 6. combination
- 7. the minimum amount of energy required to start a chemical reaction
- 9. a material that increases the rate of a reaction by lowering the activation energy
- 10. the principle stating that matter is not created or destroyed during a chemical reaction
Down
- 1. A chemical reaction that breaks down compounds into simpler products.
- 2. a person or thing that takes the place of another
- 3. a solid that forms from a solution during a chemical reaction.
- 4. a reaction in which energy is absorbed
- 8. A material that decreases the rate of a reaction