Across
- 5. Substance that speeds up a chemical reaction
- 7. atoms connected
- 9. chemical components
- 10. amount of matter
- 11. a substance
- 12. scientific study of composition structure
- 13. chemical substance
- 15. transferring heat
- 16. atoms combine
Down
- 1. attraction of molecules
- 2. amount of energy transfer
- 3. 3D space
- 4. smallest unit matter can be divided into
- 6. substances converted
- 8. average kinetic energy
- 9. stuff,takes up space
- 12. elements combine
- 14. a pure substance