Across
- 3. stops the forest fire
- 6. stops bacterial activity
- 9. grain dust can explode because it reacts quickly with ______
- 11. removes oxygen
- 15. pressure & temperature are directly proportional
- 17. acid prevents growth
- 18. there’s new substance formed
- 21. mass is neither created nor destroyed in a chemical reaction
- 22. higher temperature leads to ______ movement of molecules
- 23. occupy large surface area
- 25. pressure & volume are inversely proportional
- 26. removing this will stop the fire
- 27. slows bacteria growth
- 28. no new substance formed
Down
- 1. burning wood is an example of a _______ change
- 2. slide past each other
- 4. matter is made of tiny particles that are always moving
- 5. pushing a syringe makes the _____ of gas smaller
- 7. hot air balloons _____ when heated
- 8. he proposed the Law of Conservation of Mass
- 10. move freely
- 12. removes water from bacteria
- 13. boiling water is an example of a ________ change
- 14. one of the things needed to start the fire
- 16. temperature & volume are directly proportional
- 19. one of the things needed to start the fire
- 20. vibrate in place
- 24. dust explosions happen because tiny particles have high _____