Across
- 3. increases reaction rate by lowering activation energy
- 4. solids that forms from liquids in chemical change
- 7. number in front of chemical formula in equation
- 10. amount of substance in given volume
- 14. system matter can enter or escape
- 15. two elements in different compounds trade places
- 17. of conservation of mass says matter is not created or destroyed
- 19. decreases the rate of chemical reaction
Down
- 1. substances that undergo chemical changes
- 2. compounds break down into simpler products
- 5. system matter does not enter or leave
- 6. equation shows chemical reaction using symbols
- 8. reaction reaction that absorbs energy
- 9. biological catalyst
- 11. reaction reaction that releases energy
- 12. two or more elements combine to form more complex compound
- 13. new substances formed in chemical change
- 16. energy minimum amount of energy needed to start reaction
- 18. change any change that alters form or appearance