Question 1

What is one major way in which humans harmfully impact the water cycle?

Accepted Answer

A)  overpumping of aquifers
B)  expanding wetlands
C)  decreasing runoff
D)  increasing infiltration
E)  recharging aquifers A

Question 2

Use the accompanying figure to answer the following question(s). Why would there be fewer organisms at level A than at any level below it?

Accepted Answer

The amount of energy lost between levels is so great there is not sufficient energy remaining at the upper level to sustain more.

Question 3

Ecologists assign every type of organism in an ecosystem to a feeding level or ____________________.

Accepted Answer

trophic level

Question 4

What is an end product of anaerobic respiration?

Accepted Answer

A)  acetic acid
B)  glucose
C)  oxygen
D)  carbon dioxide
E)  water

Question 5

All physical forms of water (solid, liquid, and gas)on or near the earth's surface make up the ____.

Accepted Answer

A)  atmosphere
B)  lithosphere
C)  biosphere
D)  hydrosphere
E)  troposphere

Question 6

Although tropical rain forests are only about 2% of the earth's land surface, they contain about 50% of the world's land plant and animal species.

Accepted Answer

A) True 
 B)False

Question 7

What term describes organisms that complete the final breakdown and recycling of organic materials from the remains of all organisms?

Accepted Answer

A)  detritivores
B)  omnivores
C)  carnivores
D)  herbivores
E)  decomposers

Question 8

What is the innermost layer of the atmosphere, extending 17 kilometers above sea level at the tropics and about 7 kilometers above the earth's north and south poles?

Accepted Answer

A)  troposphere
B)  stratosphere
C)  hydrosphere
D)  geosphere
E)  biosphere

Question 9

Which statement about water is true ?

Accepted Answer

A)  Water exists as a liquid over a wide temperature range.
B)  Water compresses when it freezes.
C)  Water filters out nearly all UV radiation.
D)  Water evaporates with very little energy.
E)  Liquid water is typically not a good solvent.

Question 10

Temporary oceanic, atmospheric, and terrestrial storage sites for nutrients are called ____________________.

Accepted Answer

The answer of Temporary oceanic, atmospheric, and terrestrial storage sites...

Question 11

A group of different species living in a particular place, and potentially interacting with each other is called a population.

Accepted Answer

A) True 
 B)False

Question 12

Ecology is the study of ____.

Accepted Answer

A)  how human impacts the environment
B)  the abiotic elements of the environment
C)  the biotic elements of the environment
D)  how organisms interact with each other and the nonliving environment
E)  how evolution formed populations

Question 13

Use the accompanying figure to answer the following question(s). How many kilocalories have been lost between level A and level D?

Accepted Answer

The answer of  Use the accompanying figure to answer...

Question 14

In the accompanying figure, notice that heat is lost by each component of the ecosystem, and that the sun is shown entering at only one point in the system. Explain how this is representative of the two laws of energy (two laws of thermodynamics).

Accepted Answer

The answer of  In the accompanying figure, notice that...

Question 15

Thanks to concentrated efforts, nearly half of the waste produced by humans is now recycled.

Accepted Answer

A) True 
 B)False

Question 16

Scientists have less than ____ percent of the ecological data they need to evaluate the ecosystems in the United States.

Accepted Answer

A)  5
B)  8
C)  12
D)  25
E)  50

Question 17

Ammonia that is not taken up by plants may undergo ____.

Accepted Answer

A)  denitrification
B)  nitrogen fixation
C)  nitrification
D)  acid deposition
E)  phosphorization

Question 18

The use of transmitters and GPS systems are very important in the study of ____.

Accepted Answer

A)  alterations in the water cycle
B)  acid rain
C)  environmental degradation
D)  volcanic activity
E)  endangered species

Question 19

Most precipitation falling on terrestrial ecosystems becomes ____.

Accepted Answer

A)  surface runoff into lakes, streams, and the ocean
B)  ice in glaciers
C)  groundwater in aquifers
D)  storage as part of rocks
E)  storage in living components of ecosystems

Question 20

High quality energy is constantly ____.

Accepted Answer

A)  being made
B)  being recycled
C)  being destroyed
D)  becoming matter
E)  becoming low quality energy

Exam 3: Ecosystems: What Are They and How Do They Work

What is one major way in which humans harmfully impact the water cycle?

Use the accompanying figure to answer the following question(s). Why would there be fewer organisms at level A than at any level below it?

Ecologists assign every type of organism in an ecosystem to a feeding level or ____________________.

What is an end product of anaerobic respiration?

All physical forms of water (solid, liquid, and gas) on or near the earth's surface make up the ____.

Although tropical rain forests are only about 2% of the earth's land surface, they contain about 50% of the world's land plant and animal species.

What term describes organisms that complete the final breakdown and recycling of organic materials from the remains of all organisms?

What is the innermost layer of the atmosphere, extending 17 kilometers above sea level at the tropics and about 7 kilometers above the earth's north and south poles?

Which statement about water is true ?

Temporary oceanic, atmospheric, and terrestrial storage sites for nutrients are called ____________________.

A group of different species living in a particular place, and potentially interacting with each other is called a population.

Ecology is the study of ____.

Use the accompanying figure to answer the following question(s). How many kilocalories have been lost between level A and level D?

In the accompanying figure, notice that heat is lost by each component of the ecosystem, and that the sun is shown entering at only one point in the system. Explain how this is representative of the two laws of energy (two laws of thermodynamics).

Thanks to concentrated efforts, nearly half of the waste produced by humans is now recycled.

Scientists have less than ____ percent of the ecological data they need to evaluate the ecosystems in the United States.

Ammonia that is not taken up by plants may undergo ____.

The use of transmitters and GPS systems are very important in the study of ____.

Most precipitation falling on terrestrial ecosystems becomes ____.

High quality energy is constantly ____.