Across
- 4. the process by which one or more substances change
- 7. Absorbs heat and energy
- 8. a group of atoms bonded together
- 9. energy energy that comes from heat
- 10. the smallest unit of an element
Down
- 1. a chemical reaction where heat is absorbed
- 2. A substance that takes part in and undergoes change during a chemical reaction
- 3. a substance produced during a chemical reaction
- 5. gives off heat and energy
- 6. a chemical reaction where heat is released