Question 1

Studies of ocean-floor sediments are of little use when studying long-term climate change.

Accepted Answer

A) True 
 B)False

Question 2

Astronomical causes of climate change occur with cycles of:

Accepted Answer

A)  1 - 5 million yrs.
B)  20,000 yrs.
C)  450,000 yrs.
D)  100 million yrs.
E)  26,000 - 100,000 yrs.

Question 3

Measured variations in the Sun's emission of radiation and observed changes in the earth's climate:

Accepted Answer

A)  have not been clearly linked.
B)  happen on an 11-year cycle.
C)  happen on a 22-year cycle.
D)  are well understood.

Question 4

The tilt of the earth's axis varies between 22.1 and 28.5 degrees.

Accepted Answer

A) True 
 B)False

Question 5

Which one of the following statements is not related to the astronomical theory of climatic change?

Accepted Answer

A)  variations in the shape of the earth's orbit
B)  changes in the angle that the earth's axis makes with the plane of the ecliptic
C)  wobbling of the earth's axis
D)  variations in solar output
E)  distance variations between the earth and the Sun

Question 6

The continents have been in the exact same locations since the earth began.

Accepted Answer

A) True 
 B)False

Question 7

If a volcanic eruption produces a climate impact that lasts for a year or longer,the most likely culprit is:

Accepted Answer

A)  ash suspended in the atmosphere.
B)  the state of the climate at the time of the eruption.
C)  aerosols produced by sulfur dioxide emitted from the volcano.
D)  a high volume of debris ejected during the eruption.

Question 8

Past climate data measured with instruments extends back about

Accepted Answer

A)  30 yrs.
B)  200 yrs.
C)  100 yrs.
D)  500 yrs.

Question 9

List four greenhouse gases.

Accepted Answer

carbon dioxide,metha...

Question 10

CO₂ concentrations today are not any higher than they have been during past high points over the last 400,000 years.

Accepted Answer

A) True 
 B)False

Question 11

Although the carbon dioxide content of our atmosphere has been rising,the outlook is that,in the very near future,the carbon dioxide content will stabilize (stop increasing)and perhaps even decline.

Accepted Answer

A) True 
 B)False

Question 12

Proxy data:

Accepted Answer

A)  provide climate data representing times when instruments were not available to measure them.
B)  are difficult to find because they occur only in very limited areas.
C)  come quality-controlled instrument records.
D)  can only extend the temperature record back an additional 500 years.

Question 13

Global warming may cause changes in Earth's albedo.

Accepted Answer

A) True 
 B)False

Question 14

The part of a plant that is best preserved and can most easily be used for climate reconstruction is:

Accepted Answer

A)  the leaf vein.
B)  the pollen.
C)  the root structure.
D)  the flower.

Question 15

Global warming could lead to a shorter growing season at high latitudes

Accepted Answer

A) True 
 B)False

Question 16

Requirements for an ice age on Earth include:

Accepted Answer

A)  smaller obliquity angle.
B)  a weaker Sun.
C)  larger obliquity angle.
D)  continents located at high latitudes.
E)  continents located at low latitudes.

Question 17

The best way to estimate the cooling effect of a volcanic eruption is by estimating the volume of material ejected.

Accepted Answer

A) True 
 B)False

Question 18

Compared to climate changes due to plate tectonics and astronomical causes,the changes due to volcanic eruptions are:

Accepted Answer

A)  very short.
B)  much larger.
C)  longer.
D)  of equal duration.

Question 19

One possible result of the addition of carbon dioxide to the atmosphere is an increase in cloud cover which,in turn,could partly offset a global temperature increase.

Accepted Answer

A) True 
 B)False

Question 20

Which of these is the most important cause of the increase in atmospheric CO₂?

Accepted Answer

A)  decaying vegetation
B)  burning of coal and petroleum
C)  wetlands and swamps
D)  cattle
E)  deforestation

Exam 14: The Changing Climate

CO₂ concentrations today are not any higher than they have been during past high points over the last 400,000 years.

Correct AnswerverifiedShow Answer

The continents have been in the exact same locations since the earth began.

Correct AnswerverifiedShow Answer

Global warming may cause changes in Earth's albedo.

Correct AnswerverifiedShow Answer

Which of these is the most important cause of the increase in atmospheric CO₂?

Correct AnswerverifiedShow Answer

Requirements for an ice age on Earth include:

Correct AnswerverifiedShow Answer

The best way to estimate the cooling effect of a volcanic eruption is by estimating the volume of material ejected.

Correct AnswerverifiedShow Answer

Astronomical causes of climate change occur with cycles of:

Correct AnswerverifiedShow Answer

Which one of the following statements is not related to the astronomical theory of climatic change?

Correct AnswerverifiedShow Answer

Proxy data:

Correct AnswerverifiedShow Answer

Global warming could lead to a shorter growing season at high latitudes

Correct AnswerverifiedShow Answer

Although the carbon dioxide content of our atmosphere has been rising,the outlook is that,in the very near future,the carbon dioxide content will stabilize (stop increasing)and perhaps even decline.

Correct AnswerverifiedShow Answer

Past climate data measured with instruments extends back about

Correct AnswerverifiedShow Answer

If a volcanic eruption produces a climate impact that lasts for a year or longer,the most likely culprit is:

Correct AnswerverifiedShow Answer

One possible result of the addition of carbon dioxide to the atmosphere is an increase in cloud cover which,in turn,could partly offset a global temperature increase.

Correct AnswerverifiedShow Answer

Measured variations in the Sun's emission of radiation and observed changes in the earth's climate:

Correct AnswerverifiedShow Answer

The tilt of the earth's axis varies between 22.1 and 28.5 degrees.

Correct AnswerverifiedShow Answer

The part of a plant that is best preserved and can most easily be used for climate reconstruction is:

Correct AnswerverifiedShow Answer

Studies of ocean-floor sediments are of little use when studying long-term climate change.

Correct AnswerverifiedShow Answer

List four greenhouse gases.

Correct Answerverifiedcarbon dioxide,metha...View AnswerShow Answer

Compared to climate changes due to plate tectonics and astronomical causes,the changes due to volcanic eruptions are:

Correct AnswerverifiedShow Answer

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carbon dioxide,metha...
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