Across
- 2. either negative or positive will determine the reaction
- 4. chemical... hold molecules together
- 9. the energy a reaction needs to get started
- 10. delta H endothermic reaction
- 12. gives off energy
- 13. an endothermic reaction involving plants
- 15. delta H exothermic reaction
- 16. takes in energy
Down
- 1. warmth
- 3. absorbs energy CaCO3+ Heat= CaO+ CO2
- 5. Hydrogen is a ...
- 6. water changing matter
- 7. things they start with
- 8. things they end with
- 11. releases energy CH4+ O2= CO2+ H2O
- 14. molecules needed to break and repair bonds