Chapter 20 Study Notes

1. Chapter 20Study Notes Ocean Water

2. 1 • A layer of _____ covering ocean water in Polar Regions is called ____ ______. • ice • pack ice.

3. 2 • A major problem for ________ is ________. • aquaculture • pollution.

4. 3 • As deep ocean water becomes ________, it also becomes ________ and ______ through the ocean basins. • colder, • denser • sinks

5. 4 • As the ________ changes, the ocean and atmosphere are continuously exchanging ___________. • temperature • gases.

6. 5 • By studying variations in _____ in the ocean, scientists can determine the presence of ________. • color • phytoplankton.

7. 6 • _______________ dissolve most easily in _____________ ocean water. • Gases • cold

8. 7 • In addition to increased use of _____ chemicals, increased world _______ has reduced the ocean’s ability to renew itself. • toxic • population

9. 8 • ______ _______ live in the ______ zone. • Marine • mammals • pelagic

10. 9 • Most ______________ enters the ocean from the ______________________. • oxygen • atmosphere

11. 10 • Most offshore ________ and petroleum deposits are found along continental _________________. • oil • margins.

12. 11 • Most wavelengths of visible ______ are absorbed by ocean water and microscopic sea life, the one color that is most _________ is _______. • light • reflected • blue.

13. 12 • Ocean water ________ depends on the solar energy an area receives and the water’s ________________. • temperature • movement.

14. 13 • ______ are the foundation of life in the ocean because they form the base of the ocean ______ _____. • Plankton • food chain.

15. 14 • _____ is the “_______of life” in the ocean. • Plankton • foundation

16. 15 • Raising aquatic plants and animals for human consumption is __________. • aquaculture.

17. 16 • _____ _____ are an example of _______. • Sea sponges • benthos.

18. 17 • Some of the most deadly _________ found in ocean water today include mercury, toxic chemicals such as DDT, and ________. • pollutants • lead.

19. 18 • The most ______ ocean resource, found beneath the ocean floor, is _________. • valuable • petroleum.

20. 19 • The Ocean is often referred to as a ______ _____ because it contains 60 times more carbon than the atmosphere. • carbon • sink

21. 20 • The ocean is the main source of the _____ minerals _______ and _______. • trace • magnesium • bromine.

22. 21 • The ocean zone that receives the ______ _____ energy and is home to the most diverse ocean life forms is the ______ _________. • most • solar • pelagic zone.

23. 22 • The process of _______ salt from ocean water is called ___________. • removing • desalination.

24. 23 • ________ elements in the ocean are those minerals that are _______ in amount. • Trace • smallest

25. 24 • When surface ocean water is ______ by solar energy, its density _________. • warmed • decreases.

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