Across
- 1. mas: number of protons + number of neutrons= number of electrons
- 4. dug into an aquifer to retrieve water
- 7. has a negative charge
- 9. the basic of all things on earth
- 12. is able to move through it
- 13. an organisms role in its environment
- 14. the ability of a substance to be pulled into a wire
- 16. has a positive charge
- 17. rock layer that holds water
- 18. measure of how clear water is
- 20. pure substance that can not be broken down
Down
- 2. is the proper it of some materials that attract iron
- 3. how much space something takes up
- 5. all the water on earth
- 6. is the mass per unit volume of a substance
- 8. in a rock
- 10. is the ability or a substance to be rolled or pounded into sheets
- 11. measure of gravity
- 15. has no charge (neutral)
- 19. a result of element losing or gaining elements