Hydrology

2. The entire geographical area drained by a river and its tributaries.
6. A system that uses underwater sound waves to measure distance and locate objects.
7. Allows substances to easily pass through.
9. A ridge, or continuous line of high land, from which water flows in different directions.
10. An increase in nutrients in a lake or pond, occurring naturally or as a result of pollution, which causes increased growth of algae.
12. The flat or gently sloping land that lies submerged around the edges of a continent and extends from the shoreline out to the continental slope.
14. The yearly rising and sinking of cold and warm layers in a lake.
15. The vertical movement of deep water up to the surface bringing up nutrients from the deep ocean allowing animals to thrive.
16. Pollution with a widely spread source that can’t be tied to a specific point of origin.
20. A well in which water moves upward to the surface naturally because its under pressure
21. Areas of land that water drains into when the ground is saturated or impermeable.
22. The ratio of the mass of a substance to the volume of the substance. (mass/volume)

1. Pollution that enters water from a specific source that can be identified.
3. An underground layer of permeable rock that contains water
4. vent An opening in the sea floor from which heated water rises and mixes with the ocean water above.
5. The process of removing salt from ocean water.
6. The amount of salt in a substance.
8. does not allow substances to pass through.
10. A shoreline area where fresh water from a river mixes with salt water from the ocean.
11. Passed in the U.S. in 1972, this law focused regulation on industrial waste and water contamination as well as waste water treatment.
13. The movement of water from the surface to greater depths carrying oxygen down allowing animals to thrive.
17. A measure of the clarity of water that depends on the amount, size and composition of suspended matter.
18. A form of nutrient pollution.
19. The highest part in the ground that is saturated, or completely filled with water.