Across
- 5. changes the rate of the chemical reaction without being used up very much
- 7. a solid that is produced as a result of a chemical reaction in a solution
- 8. a substance or molecule that participates in a chemical reaction
Down
- 1. a chemical relation in which heat is released to the surroundings
- 2. A substance that slows or stops a chemical reaction
- 3. reaction A chemical reaction that requires heat
- 4. of conservation of mass mas can not be created or destroyed in ordanary chemical and physical changes
- 5. reaction one or more substances change to produce one or more different substances
- 6. energy A minimum amount of energy required to start a chemical reaction
- 7. a substance that forms in a chemical reaction