Across
- 1. the variable you keep the same
- 4. change in y/change in x
- 6. no matter is gained or lost in this system
- 10. produced when sodium thiosulfate reacts with hydrochloric acid
- 12. produced when a metal reacts with an acid
- 13. used to measure the gas produced by a reaction
- 15. the variable you change
- 17. produced when marble chips react with an acid
- 18. mass of solid in a volume of solvent
- 19. A reaction where energy is absorbed
- 20. a biological catalyst
Down
- 2. quantity of reactant used/time taken
- 3. speeds up the rate without being used up
- 5. A reaction where energy is released
- 7. the variable you measure
- 8. the minimum amount of energy particles must have to react
- 9. this type of reaction can make the reactants from the product
- 11. Starting materials
- 14. The piece of equipment used to measure time
- 16. Chemical reactions can occur only when particles do this