Chapter 20 Study Notes

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Chapter 20 Study Notes

• Ocean Water

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Chapter 20 Section 1

• Properties of Ocean Water

3
1

• Most _______ enters the ocean from the
  ___________.

oxygen
atmosphere
4
2

• _______ dissolve most easily in ______ ocean
  water.

Gases
cold
5
3

• As the __________ changes, the ocean and
  atmosphere are continuously exchanging ______.

temperature
gases
6
4

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

carbon
sink
7
5

• ________ elements in the ocean are those minerals
  that are _________ in amount.

Trace
smallest
8
6

• Ocean water ___________ depends on the solar
  energy an area receives and the waters
  ___________.

temperature
movement
9
7

• A layer of _____ covering ocean water in Polar
  Regions is called ______ ___.

ice
pack
ice
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8

• When surface ocean water is ________ by solar
  energy, its density _________.

warmed
decreases
11
9

• As deep ocean water becomes ________, it also
  becomes ________ and ______ through the ocean
  basins.

colder
denser
sinks
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10

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

light
reflected
blue
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11

• By studying variations in _____ in the ocean,
  scientists can determine the presence of
  ____________.

color
phytoplankton
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Chapter 20 Section 2

• Life in the Ocean

15
12

• ________ is the __________of life in the ocean.

Plankton
foundation
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13

• ________ are the foundation of life in the ocean
  because they form the base of the ocean ______
  _____.

Plankton
food
chain
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14

• _____ _______ are an example of _______.

Sea
sponges
benthos
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15

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

most
solar
pelagic
zone
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16

• ______ _________ live in the ______ zone.

Marine
mammals
pelagic
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Chapter 20 Section 3

• Ocean Resources

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17

• The process of _________ salt from ocean water is
  called ___________.

removing
desalination
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18

• The most ________ ocean resource, found beneath
  the ocean floor, is _________.

valuable
petroleum
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19
oil

• Most offshore ____ and petroleum deposits are
  found along continental ________.

margins
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20
trace

• The ocean is the main source of the _____
  minerals __________ and _______.

magnesium
bromine
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21

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

aquaculture
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22

• A major problem for ___________ is ________.

aquaculture
pollution
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23
toxic

• In addition to increased use of _____ chemicals,
  increased world ____________ has reduced the
  oceans ability to renew itself.

population
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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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THE END