Question 1

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

Accepted Answer

A) True 
 B)False  False

Question 2

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. 
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. C

Question 3

Thermoclines in the ocean are best developed at lower latitudes.

Accepted Answer

A) True 
 B)False  True

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

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 6

The average salinity of seawater is ________.

Accepted Answer

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

Question 7

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 above 
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 above

Question 8

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

Question 9

________ organisms live on or in the ocean bottom.

Accepted Answer

A) Nektonic 
B) Planktonic 
C) Scavenging 
D) Benthonic 
E) none of these 
A) Nektonic 
B) Planktonic 
C) Scavenging 
D) Benthonic 
E) none of these

Question 10

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; temperature 
A) evaporation; precipitation 
B) precipitation; evaporation 
C) temperature; evaporation 
D) precipitation; temperature

Question 11

Plankton are organisms that swim freely in the ocean.

Accepted Answer

A) True 
 B)False

Question 12

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 13

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. 
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.

Question 14

Which is more dense,seawater or freshwater?

Accepted Answer

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

Question 15

Density in seawater is determined by ________.

Accepted Answer

A) temperature 
B) salinity 
C) both temperature and salinity 
D) none of these 
A) temperature 
B) salinity 
C) both temperature and salinity 
D) none of these

Question 16

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 17

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 chemistry 
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 chemistry

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 billion 
A) parts per hundred 
B) parts per thousand 
C) parts per million 
D) parts per billion

Question 19

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 habitat 
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 habitat

Question 20

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 above 
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 above

Exam 14: Ocean Water and Ocean Life

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

Why is productivity low in tropical regions?

Thermoclines in the ocean are best developed at lower latitudes.

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

The average salinity of seawater is ________.

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

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?

________ organisms live on or in the ocean bottom.

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

Plankton are organisms that swim freely in the ocean.

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

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

Which is more dense,seawater or freshwater?

Density in seawater is determined by ________.

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

Density is an important property of ocean water because ________.

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

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

What limits productivity in polar regions?

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

Weathering, soil, and Mass Wasting

Running Water and Groundwater

Glaciers, deserts, and Wind

Plate Tectonics: a Scientific Revolution Unfolds

Earthquakes and Earths Interior

Volcanoes and Other Igneous Activity

Crustal Deformation and Mountain Building

Geologic Time

Earths Evolution Through Geologic Time

The Ocean Floor

The Dynamic Ocean

The Atmosphere: Composition,structure,and Temperature

Moisture, clouds, and Precipitation

Air Pressure and Wind

Weather Patterns and Severe Weather

World Climates and Global Climate Change

Origin of Modern Astronomy

Touring Our Solar System

Light,astronomical Observations,and the Sun

Beyond Our Solar System

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