American Public University - SCIN 138 B001

Exam 7

1)Which of the following is NOT a type of desert?

A.interior

B.subtropical C.Polar

 D.grassland

Question 2

Irrigation in the Great Plains as shown, helps prevent desertification, but it also leads to            .  

A.depletion of aquifers

B.continental deserts C.wetlands

D.loss of fertilizer

Question 3

Glacial ice is generally formed by     .

 A.frozen rivers

 B.recrystallized snow C.icebergs

D.frost wedges

Question 4

In the glacial "ice budget," a zone of snow accumulation is balanced by a zone of            .

A.abrasion

B.exhalation C.rockfall

 D.ablation

Question 5

The precise linkage between global climate change and human activity is NOT accurately measurable.  

Question 6

The main mechanism of glacial movement is   .

A.melting

 B.basal sliding C.frost heaving

D.ice wedging

Question 7

The classic shape of the glacial valley shown here is   .

A.very narrow

B.V-shaped C.terraced

 D.U-shaped

Question 8

Data from the past 100 years indicates that global temperatures have increased approximately            °C:

A.0.1

B.0.2

 C.0.6 D.1.2

Question 9

Which of the following does NOT have a known effect on Earth's climate?  

A.Earth-Moon tidal gravity

B.greenhouse effect C.eccentricity of Earth's orbit D.tilt of the Earth

Question 10

If greenhouse gas levels remain the same as today, we can expect 50-year temperature increases in the range of         °C:

A.10-25

 B.0.5-1.5 C.2-6

D.0.1-0.3

Question 11

Which of the following is NOT a likely consequence of enhanced global warming?

A.flooding of islands

B.increased droughts C.stronger storms

 D.enlarged ozone hole

Question 12

Of all the planets, the most similar to Earth is    .

A.Pluto

B.Mercury C.Venus  D.Mars

Question 13

Greenhouse gases entirely control global climate.

Question 14

Which of the following gases were NOT likely contained in Earth's primary atmosphere? A.argon

B.nitrogen C.helium

 D.oxygen

Question 15

The radiative balance between incoming and outgoing energy is moderated by the        .

A.climate

B.global warming

 C.greenhouse effect D.atmosphere E.anthroposphere

Question 16

Which is the most important of the naturally occurring greenhouse gases?

1. carbon dioxide B.ozone C.methane

 D.water vapor E.nitrous oxide

Question 17

          scatter incoming solar radiation, resulting in the cooling of Earth’s surface. A.Albedos

2. Radiatively active gasses  C.Aerosols D.Ozones

E.All of the aforementioned.

Question 18

Evidences of recent climate change are found in   . A.changes in animal migrations, including penguins B.shrinking of mountain glaciers

C.reduction of sea ice

D.increased temperature in the arctic  

E.all of the above

Question 19

The most probable cause of anthropogenic warming in the foreseeable future is the increase in           .

A.chlorine oxides

B.ozone C.sunlight

 D.carbon dioxide E.chlorofluorocarbons

Question 20

Which of the following is NOT a likely consequence of enhanced global warming?

A.flooding of islands

B.increased droughts C.stronger storms

 D.enlarged ozone hole E.loss of coral reefs

Question 21

Global warming refers to present-day warming of the world’s climate that most scientists believe is likely to continue and is, at least, partly caused by human activities.

Question 22

Climate is the average weather conditions of a location or region over time.

Question 23

Global warming refers to present-day warming of the world’s climate that most scientists believe is likely to continue and is, at least, partly caused by human activities.

Question 24

The long-term storage of a material in isolation from the atmosphere is termed