Across
- 5. a change of materials into another
- 10. a substance that can be observed in a chemical reaction
- 14. a substance that speeds up a chemical reaction
- 15. reactants getting converted into products
- 16. an attraction between atoms
- 17. heat being generated or lost
Down
- 1. attraction of water molecules
- 2. thermal energy being transferred
- 3. a change in physical properties
- 4. a substance being observed with out changing the identity of the object
- 6. a chemical reaction that absorbs heat
- 7. basic part of a whole
- 8. smallest part of a substance that cant be broken down
- 9. a science that deals with coposition
- 11. a chemical reaction that gives off heat
- 12. a substance that is present at the end of a chemical reaction
- 13. amount of mater in an object
- 14. a substance made from two or more different elements