Across
- 2. A reaction that takes in heat
- 3. Substances that exist before the chemical reaction.
- 6. What needs oxygen and causes fire?
- 10. Substance that is created after the chemical reaction
- 11. A reaction that gives off heat
- 13. A reaction involving oxygen
- 14. The substance that dissolves the other substance
- 16. Gas that is made when the fire is burning.
- 19. The breakdown of a compound into smaller substances.
- 20. The number in front of formulas in chemical equations.
Down
- 1. Mass cannot be destroyed not be created.
- 4. "Universal Solvent"
- 5. A reaction where two substances combine
- 7. When a object changes its substance.
- 8. The process of rust forming.
- 9. A reaction where atoms swap partners.
- 12. The study of chemicals.
- 15. A fast and violent reaction
- 17. A fire needs this gas to start.
- 18. The substance that gets dissolved