Across
- 1. known as a life-giving gaseous envelope
- 3. the interiors of continents
- 7. submerged volcanic structures
- 9. the rigid outer layer that includes the crust and uppermost mantle.
- 11. it contains weak rocks
- 13. the study of Earth
- 14. a tentative (or untested) explanation
- 16. contains all life on Earth
Down
- 2. a dynamic mass of water
- 4. the study atmosphere
- 5. it contains the continental shelf and islands.
- 6. the study of the ocean
- 8. the study of the universe
- 10. they are made of deformed igneous and metamorphic rocks
- 12. the elevated status of a Hypothesis
- 15. it is a group of interacting, or interdependent, parts that form a complex whole.