Water Systems

5. The movement of deep water to the surface when surface water is pushed aside
9. Increase in the average temperature of the Earth's oceans and air
12. The change of state from liquid to a gas
14. The environment surrounding the planet
15. A word that describes rain, snow, hail, or sleet
17. The change of state from a gas to a liquid due to a decrease in temperature
18. Includes all of the water in,on and around the earth
21. Includes evaporation, condensation, precipitation and run-off

1. Salt water is more ? than fresh water
2. Large chunks that have broken of a glacier
3. The rocky solid ground of the Earth's crust
4. High levels usually result in healthy aquatic environments
6. An area on Earth where salinity levels are higher than average due to increased evaporation
7. Ocean water near the continents has a lower ? level due to run-off
8. The ? of salt water is -1.9 degrees Celcius
10. A scientist who studies all aspects of the ocean
11. A well is an example of this
13. The cloudiness of the water
15. An area on Earth where salinity levels are higher than average due to freezing of ocean water
16. Water that flows over the land and eventually ends up in a lake, ocean or ground
18. A person who studies Earth's water systems
19. Cause an increase in algae which then causes a decrease in oxygen levels in the water
20. A moving mass of ice and snow