Question 1

What limits productivity in polar regions?

Accepted Answer

A)  low temperatures of the surface waters
B)  high density of the surface waters
C)  The thermocline acts as a barrier to mixing of surface and deep waters.
D)  the lack of sunlight year round
E)  all of the aboveF) B) and D)
G) B) and E)

Question 2

Which has more of an impact on density in the oceans in general,temperature or salinity?

Accepted Answer

The answer of Which has more of an impact on...

Question 3

The thermocline or area of rapid temperature change in the ocean is important because ________.

Accepted Answer

A)  different chemical compositions form at different temperatures
B)  it forms a barrier to many types of marine life that can only exist within certain temperature ranges
C)  the ability for the ocean to dissolve CO2 from the atmosphere is dependent on temperature over a range of depths.
D)  it controls the climate and rate of evaporation and precipitation near the oceans.
E)  none of the aboveF) None of the above
G) A) and E)

Question 4

Discuss variations in temperature and density of seawater with depth in the oceans.Please use Figure 14.3 to help with your discussion.What are the key factors that influence or control temperature and density? Are these variations the same worldwide or are they specific to certain regions? Explain.

Accepted Answer

Temperature follows a simple bell curve,...

Question 5

Plankton are organisms that swim freely in the ocean.

Accepted Answer

A) True 
 B)False

Question 6

Thermoclines in the ocean are best developed at lower latitudes.

Accepted Answer

A) True 
 B)False  True

Question 7

Large Blue whales that are up to 30 meters long live primarily on krill that is only about 6 cm long.

Accepted Answer

A) True 
 B)False

Question 8

Salinity in the ocean is highest in regions where ________ is high and ________ is low.

Accepted Answer

A)  evaporation; precipitation
B)  precipitation; evaporation
C)  temperature; evaporation
D)  precipitation; temperatureE) B) and C)
F) A) and D)

Question 9

Major fisheries are concentrated in the neritic zone (above the continental shelf) because of all of the following except ________.

Accepted Answer

A)  there is an abundance of sunlight to support photosynthesis
B)  there are rapid changes in oxygen concentrations,temperature,and salinity that encourage diversity
C)  nutrients wash in from land
D)  the sea bottom provides shelter and habitatE) A) and C)
F) All of the above

Question 10

Salinity is the most important factor in the process of photosynthesis.

Accepted Answer

A) True 
 B)False  False

Question 11

Why is productivity low in tropical regions?

Accepted Answer

A)  because there is too much sunlight
B)  because the low density of the water makes it hard for plankton to float near the surface
C)  because the thermocline acts as a barrier to the mixing of surface and deep waters
D)  because the deep waters are too warm to maintain a healthy biomass
E)  All of the above are problems.F) A) and D)
G) A) and C) C

Question 12

Density is an important property of ocean water because ________.

Accepted Answer

A)  it determines the chemistry of the water
B)  it determines the horizontal position of the water
C)  it determines the temperature of the water
D)  it determines the vertical position of the water
E)  it only changes when there is a major change in water chemistryF) A) and C)
G) All of the above

Question 13

________ organisms live on or in the ocean bottom.

Accepted Answer

A)  Nektonic
B)  Planktonic
C)  Scavenging
D)  Benthonic
E)  none of theseF) B) and D)
G) D) and E)

Question 14

Density in seawater is determined by ________.

Accepted Answer

A)  temperature
B)  salinity
C)  both temperature and salinity
D)  none of theseE) None of the above
F) A) and B)

Question 15

One disadvantage to living near the surface of the ocean is ________.

Accepted Answer

A)  strong currents bring rapid changes to the environment
B)  maneuvering in the water can be difficult and make it a problem to avoid predators
C)  waves create difficulty in finding abundant food
D)  too many other marine organisms live near the surface so competition for food is difficult.E) A) and B)
F) A) and C)

Question 16

Which is more dense,seawater or freshwater?

Accepted Answer

The answer of Which is more dense,seawater or freshwater?...

Question 17

The ________ zone refers to areas of the ocean,regardless of depth,where animals swim or float freely.

Accepted Answer

The answer of The ________ zone refers to areas of...

Question 18

The proportion of dissolved substances in seawater is expressed as 0/00,which is the same as ________.

Accepted Answer

A)  parts per hundred
B)  parts per thousand
C)  parts per million
D)  parts per billionE) A) and C)
F) All of the above

Question 19

The average salinity of seawater is ________.

Accepted Answer

A)  0) 01%
B)  0) 27%
C)  3) 5%
D)  19.8%
E)  30.0%F) B) and D)
G) C) and D)

Question 20

Ocean life appears to be affected by a relatively small number of variables such as temperature,density,available sunlight,available nutrients.If any one of these variables changes how do you think it might it impact the human food web?

Accepted Answer

The oceans are huge so it would be diffi...

Exam 14: Ocean Water and Ocean Life

What limits productivity in polar regions?

Correct AnswerverifiedShow Answer

Which has more of an impact on density in the oceans in general,temperature or salinity?

Correct AnswerverifiedShow Answer

The thermocline or area of rapid temperature change in the ocean is important because ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedTemperature follows a simple bell curve,...View AnswerShow Answer

Plankton are organisms that swim freely in the ocean.

Correct AnswerverifiedShow Answer

Thermoclines in the ocean are best developed at lower latitudes.

Correct AnswerverifiedTrue

Large Blue whales that are up to 30 meters long live primarily on krill that is only about 6 cm long.

Correct AnswerverifiedShow Answer

Salinity in the ocean is highest in regions where ________ is high and ________ is low.

Correct AnswerverifiedShow Answer

Major fisheries are concentrated in the neritic zone (above the continental shelf) because of all of the following except ________.

Correct AnswerverifiedShow Answer

Salinity is the most important factor in the process of photosynthesis.

Correct AnswerverifiedFalse

Why is productivity low in tropical regions?

Correct AnswerverifiedC

Density is an important property of ocean water because ________.

Correct AnswerverifiedShow Answer

________ organisms live on or in the ocean bottom.

Correct AnswerverifiedShow Answer

Density in seawater is determined by ________.

Correct AnswerverifiedShow Answer

One disadvantage to living near the surface of the ocean is ________.

Correct AnswerverifiedShow Answer

Which is more dense,seawater or freshwater?

Correct AnswerverifiedShow Answer

The ________ zone refers to areas of the ocean,regardless of depth,where animals swim or float freely.

Correct AnswerverifiedShow Answer

The proportion of dissolved substances in seawater is expressed as 0/00,which is the same as ________.

Correct AnswerverifiedShow Answer

The average salinity of seawater is ________.

Correct AnswerverifiedShow Answer

Ocean life appears to be affected by a relatively small number of variables such as temperature,density,available sunlight,available nutrients.If any one of these variables changes how do you think it might it impact the human food web?

Correct AnswerverifiedThe oceans are huge so it would be diffi...View AnswerShow Answer

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Temperature follows a simple bell curve,...
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True

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Salinity in the ocean is highest in regions where is high and is low.

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False

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C

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The oceans are huge so it would be diffi...
View Answer