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
Q. 2 -
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.
Q. 3 -
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
Q. 4 -
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
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