Across
- 1. line of constant elevation
- 5. includes all life on earth
- 8. unit for measuring latitude and longitude
- 11. Earth's core is made of this
- 12. __________ system; matter or energy in/out
- 13. Thin rocky outer layer of the earth
- 14. how far east or west of the prime meridian
- 16. study of space
- 18. evidence-supported explanation for phenomenon
- 19. how far north or south of the equator
- 20. untested explanation for phenomenon
- 21. the inner layer of earth
Down
- 2. study of the oceans
- 3. ________ tectonics
- 4. simplified representation of reality
- 6. The cryosphere contains all Earth's ____
- 7. The hydrosphere contains all of Earth's _______
- 9. Resouces that can be replinished
- 10. study of earth
- 11. study of the atmosphere and weather
- 13. __________ system; only energy in or out
- 15. A blanket of air that is about 62 miles thick
- 17. set of connected parts