Question : 11.What type of desert associated with upwelling ocean currents? a.polar b.subtropical c.rain shadow d.midlatitude e.coastal 12. : 1331276

 

11.What type of desert is associated with upwelling ocean currents?

a.polar

b.subtropical

c.rain shadow

d.midlatitude

e.coastal

12.About what percentage of the Earth’s surface is covered by midlatitude deserts and semiarid grasslands?

a.14%

b.23%

c.32%

d.41%

e.55%

13.About how much of the Earth’s surface is covered by deserts exclusive of semiarid grasslands?

a.10%

b.33%

c.66%

d.75%

e.90%

14.Which of the following is NOT one of the ways trees help to stave off desertification?

a.Reduction in the reflectance of solar energy hitting the earth

b.Transpiration of water into the atmosphere

c.Biological weathering by the tree roots

d.Serving as natural windbreaks

e.Pumping deep groundwater with their roots

15.What was the key factor in the natural recovery of desert lands that happened in Kuwait?

a.enforcement of public policies

b.re-planting the area

c.decreased use of groundwater

d.fear of land mines

e.changing rainfall patterns

16.Judge the following sentence according to the criteria given below: The frequency of dust storms impacting Beijing, China, has been increasing BECAUSE fallout of herbicides and pesticides in the Arctic is common.

a.The assertion and the reason are both correct, and the reason is valid.

b.The assertion and the reason are both correct, but the reason is invalid.

c.The assertion is correct, but the reason is incorrect.

d.The assertion is incorrect, but the reason is correct.

e.Both the assertion and the reason are incorrect.

17.Judge the following sentence according to the criteria given below: Desertification results from the expansion of existing deserts BECAUSE dryland ecosystems are extremely vulnerable to inappropriate land use.

a.The assertion and the reason are both correct, and the reason is valid.

b.The assertion and the reason are both correct, but the reason is invalid.

c.The assertion is correct, but the reason is incorrect.

d.The assertion is incorrect, but the reason is correct.

e.Both the assertion and the reason are incorrect.

18.Read carefully through the following sentence and decide which of the options is correct. Analysis of sea surface temperatures in the Indian Ocean indicates that changes in land-use practices in the Sahel of Africa were sufficient to cause desertification.

a.The word “temperatures” should be replaced by “salinities.”

b.The word “Indian” should be replaced by “Atlantic.”

c.The word “land-use” should be replaced by “farming.”

d.The word “sufficient” should be replaced by “insufficient.”

e.The word “desertification” should be replaced by “drought.”

19.Which of the following is not responsible for the slow recovery of ecosystems from desertification?

a.slight rainfall

b.low species diversity

c.little soil bacterial activity

d.slow plant growth rates

e.frequent flash floods

20.Which of the following is NOT an appropriate measure for reversing desertification?

a.developing drip-irrigation systems

b.keeping grazing stock moving

c.planting drought-tolerant trees

d.establishing wind breaks

e.removing boulders from sand dunes

 

 

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