Chapter 20 Study NotesOcean Water
1• A layer of _____ covering ocean water
in Polar Regions is called ____ ______. – ice – pack ice.
2• A major problem for ________ is
________. – aquaculture – pollution.
3• As deep ocean water becomes
________, it also becomes ________ and ______ through the ocean basins.– colder, – denser– sinks
4• As the ________ changes, the ocean
and atmosphere are continuously exchanging ___________. – temperature – gases.
5• By studying variations in _____ in the
ocean, scientists can determine the presence of ________.– color – phytoplankton.
6• _______________ dissolve most easily
in _____________ ocean water.– Gases – cold
7• In addition to increased use of _____
chemicals, increased world _______ has reduced the ocean’s ability to renew itself.– toxic – population
8• ______ _______ live in the ______ zone.
– Marine – mammals – pelagic
9• Most ______________ enters the ocean
from the ______________________. – oxygen – atmosphere
10• Most offshore ________ and petroleum
deposits are found along continental _________________. – oil– margins.
11• Most wavelengths of visible ______
are absorbed by ocean water and microscopic sea life, the one color that is most _________ is _______.– light – reflected – blue.
12• Ocean water ________ depends on the
solar energy an area receives and the water’s ________________. – temperature – movement.
13• ______ are the foundation of life in the
ocean because they form the base of the ocean ______ _____.– Plankton – food chain.
14• _____ is the “_______of life” in the
ocean. – Plankton – foundation
15• Raising aquatic plants and animals
for human consumption is __________. – aquaculture.
16• _____ _____ are an example of _______.
– Sea sponges – benthos.
17• Some of the most deadly _________
found in ocean water today include mercury, toxic chemicals such as DDT, and ________.– pollutants – lead.
18• The most ______ ocean resource,
found beneath the ocean floor, is _________. – valuable – petroleum.
19• The Ocean is often referred to as a
______ _____ because it contains 60 times more carbon than the atmosphere. – carbon– sink
20• The ocean is the main source of the
_____ minerals _______ and _______. – trace – magnesium – bromine.
21• The ocean zone that receives the
______ _____ energy and is home to the most diverse ocean life forms is the ______ _________.– most – solar – pelagic zone.
22• The process of _______ salt from
ocean water is called ___________.– removing – desalination.
23• ________ elements in the ocean are
those minerals that are _______ in amount.– Trace – smallest
24• When surface ocean water is ______
by solar energy, its density _________.– warmed – decreases.
THE END
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