Across
- 2. reactions where products can turn back into reactants (10)
- 3. an exothermic reaction that happens when fuels react with oxygen (10)
- 4. a chemical, usually a transition metal, that helps reactants to react, without being used up (8)
- 6. a endothermic reaction that happens when you heat chemicals to get them to break down (6,13)
- 10. name for biological catalyst (6)
- 11. type of reaction the takes in energy from the surroundings (11)
- 13. an exothermic reaction in the body (11)
- 15. these cans use exothermic reactions to heat in coffee or tea (4,7)
- 16. how exothermic reactions feel
- 18. what particles need to do before they can react (6)
Down
- 1. by increasing this you increase the amount of collisions (7,4)
- 5. name for a chemical that doesn't have water in it (9)
- 6. increasing this means the reactant particle have more energy (11)
- 7. increasing this in liquids means collisions happen more often (13)
- 8. the amount of energy needed to get a reaction to start (10)
- 9. increasing this in reaction with gases makes them react faster (8)
- 12. these use endothermic reactions to help injuries (4,5)
- 14. type of reaction that releases heat energy (10)
- 17. how endothermic reactions feel (4)