Chapter 20 Study Notes Ocean Water

Properties of Ocean Water Chapter 20 Section 1 Properties of Ocean Water

1 Most _______ enters the ocean from the ___________. oxygen atmosphere

2 _______ dissolve most easily in ______ ocean water. Gases cold

3 As the __________ changes, the ocean and atmosphere are continuously exchanging ______. temperature gases

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

5 ________ elements in the ocean are those minerals that are _________ in amount. Trace smallest

6 Ocean water ___________ depends on the solar energy an area receives and the water’s ___________. temperature movement

7 A layer of _____ covering ocean water in Polar Regions is called ______ ___. ice pack ice

8 When surface ocean water is ________ by solar energy, its density _________. warmed decreases

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

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

11 By studying variations in _____ in the ocean, scientists can determine the presence of ____________. color phytoplankton

Chapter 20 Section 2 Life in the Ocean

12 ________ is the “__________of life” in the ocean. Plankton foundation

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

14 _____ _______ are an example of _______. Sea sponges benthos

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

16 ______ _________ live in the ______ zone. Marine mammals pelagic

Chapter 20 Section 3 Ocean Resources

17 The process of _________ salt from ocean water is called ___________. removing desalination

18 The most ________ ocean resource, found beneath the ocean floor, is _________. valuable petroleum

19 Most offshore ____ and petroleum deposits are found along continental ________. oil margins

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

21 Raising aquatic plants and animals for human consumption is __________. aquaculture

22 A major problem for ___________ is ________. aquaculture pollution

23 In addition to increased use of _____ chemicals, increased world ____________ has reduced the ocean’s ability to renew itself. toxic population

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

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