Across
- 2. indicates the number of energy levels
- 4. dense part of the atom
- 5. birthplace of stars
- 6. variety of organisms
- 10. ability to resist change in motion
- 11. map that shows areas of the same elevation
- 14. outermost electrons
- 16. nonliving part of an ecosystem
- 17. slows down motion
- 18. boundary that forms a trench
- 19. 75% of the moon is visible
- 20. forms over warm ocean water
Down
- 1. no nucleus
- 3. can make their own food
- 7. speed and direction
- 8. front that brings thunderstorms
- 9. spinning of the earth
- 12. tells the temperature of a star
- 13. highest high tide and lowest low tide
- 15. plates moving away