Across
- 2. rays a form of energy that you cannot see or feel
- 6. Meter sticks or metric rulers are used to measure
- 8. a gas that occurs naturally
- 10. split apart
- 11. The base unit for length
- 13. this makes up molecules
- 15. a chemical change in which oxygen reacts with other substances
- 16. Celsius The base unit for temperature
- 17. is formed in the earth from radium, which is also radioactive
- 18. the prediction of what will happen
- 19. can slowly destroy objects made of iron or steel
- 20. The base unit for Mass
- 21. A thermometer is used to measure
- 23. of conservation of mass the fact that matter can neither be created nor destroyed by any chemical reaction
- 25. reaction one or more substances change to form new substances
- 26. the stuff that makes up everything
- 27. how tightly packed the molecule are
Down
- 1. is made of molecules
- 3. a plentiful fossil fuel
- 4. putting together
- 5. the study of rocks
- 7. this is a theory
- 9. fusion a change in which small nuclei join to form a larger nucleus
- 12. inquiring of something you don't know
- 14. elements elements whose nuclei naturally break down into other nuclei, giving off particles and energy
- 22. the stuff that makes up matter
- 24. Graduated cylinders & beakers are used to measure