Planet Earth

7. an area where sand, silt, clay, or gravel is deposited, often at the mouth of a river
11. the changing of liquid water into gas
12. larger area of ocean partially surrounded by landmasses
13. a series of actions that produce something
14. where groundwater gathers
17. flat area that lies at a high elevation
19. the changing of water vapor into liquid water
21. landmass that is surrounded by water
22. rain that contains harmful amounts of poisons due to pollution
23. the thin layer of gases that envelop Earth
24. a lowland area between higher elevation sides
27. very great in size
28. where freshwater and salt water meet
29. the height of a land surface above the level of the sea
30. a river's end point

1. the system that consists of Earth's water
2. the part of a continent that extends out underneath the ocean and is fairly flat, but then drops sharply to the ocean floor
3. an increase or decrease in the amount of something
4. a portion of land nearly surrounded by water
5. a process that makes salt water safe to drink
6. cycle the process in which water is used and reused on Earth, including precipitation, collection, evaporation, and condensation
8. all that is living on Earth's surface, close to the surface, or in the atmosphere
9. moisture that falls to the Earth
10. the water contained inside Earth's crust
15. flat area found at lower elevations
16. largest of all landmasses
18. land makes up the part of Earth called the _____.
20. a coastal area where the water is partially surrounded by land
25. a long, narrow, steep-sided cut on the ocean floor
26. a narrow strip of land that connects two larger land areas