Across
- 4. focusing on one’s attention
- 7. Number in front of chemical formula
- 8. change Reversible change in physical properties
- 9. energy minimum quantity
- 11. Substance formed as a result of a chemical
- 13. change substance minced with another to form new one
- 14. catalyst living in organisms
- 16. breaking down something
- 17. reaction Chemical reaction that takes heat from the environment
- 19. of conversation Chemical reaction mass is not created or destroyed
Down
- 1. combination of parts
- 2. reaction Energy is transferred to its surroundings
- 3. Substance that undergoes change while happening
- 5. substance that slows down Chemical reaction
- 6. Solid that forms solutions during chemical
- 10. the act of replacing something with something else
- 12. change Irreversible chemical reaction
- 15. equation Symbols of elements for amount of substance
- 18. substance increases rate of reaction