Across
- 4. a slowly moving mass or river of ice
- 5. the rigid outer part of the earth
- 8. a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect
- 9. the envelope of gasses surrounding the earth
Down
- 1. area of land where precipitation collects and drains off into a common outlet,
- 2. a scientist who researches the distribution, circulation and physical properties of underground and surface waters
- 3. water held underground
- 6. all the waters on the earth's surface
- 7. the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land
- 10. the quality or degree of being saline