densities have grown. These regions are especially likely to have periods of
severe dryness, so that crop failures are common. Since the raising of most
crops necessitates the prior removal of the natural vegetation, crop failures
leave extensive tracts of land devoid of
a plant cover and susceptible to wind and water erosion.
5.
The word “progressively” in the
passage is closest in meaning to
○openly
○impressively
○objectively
○increasingly
6.
According to paragraph 6, which of the following is often associated with
raising crops?
○Lack of proper irrigation techniques
○Failure to plant crops suited to the particular area
○Removal of the original vegetation
○Excessive use of dried animal waste
7.
The phrase “devoid of” in the
passage is closest in meaning to
○consisting of
○hidden by
○except for
○lacking in
Paragraph
9: The final major human cause of desertification is soil salinization
resulting from overirrigation. Excess water from irrigation sinks down into the
water table. If no drainage system exists, the water table rises, bringing
dissolved salts to the surface. The water evaporates and the salts are left
behind, creating a white crustal layer that prevents air and water from
reaching the underlying soil.
8.
According to paragraph 9, the ground’s absorption of excess water is a factor
in desertification because it can
○interfere with the irrigation of land
○limit the evaporation of water
○require more absorption of air by the soil
○bring salts to the surface
9.
All of the following are mentioned in the passage as contributing to
desertification EXCEPT
○soil erosion
○global warming
○insufficient irrigation
○the raising of livestock
Paragraph
10: The extreme seriousness of
desertification results from the vast areas of land and the tremendous numbers
of people affected, as well as from the great difficulty of reversing or even
slowing the process. Once the soil has been removed by erosion, only
the passage of centuries or millennia will enable new soil to form. In areas
where considerable soil still remains, though, a rigorously enforced program of
land protection and cover-crop planting may make it possible to reverse the
present deterioration of the surface.
10.
Which of the sentences below best expresses the essential information in the highlighted sentence
in the passage? Incorrect choices change the meaning in important ways or leave
out essential information.
○Desertification is a significant problem because it is
so hard to reverse and affects large areas of land and great numbers of people.
severe dryness, so that crop failures are common. Since the raising of most
crops necessitates the prior removal of the natural vegetation, crop failures
leave extensive tracts of land devoid of
a plant cover and susceptible to wind and water erosion.
5.
The word “progressively” in the
passage is closest in meaning to
○openly
○impressively
○objectively
○increasingly
6.
According to paragraph 6, which of the following is often associated with
raising crops?
○Lack of proper irrigation techniques
○Failure to plant crops suited to the particular area
○Removal of the original vegetation
○Excessive use of dried animal waste
7.
The phrase “devoid of” in the
passage is closest in meaning to
○consisting of
○hidden by
○except for
○lacking in
Paragraph
9: The final major human cause of desertification is soil salinization
resulting from overirrigation. Excess water from irrigation sinks down into the
water table. If no drainage system exists, the water table rises, bringing
dissolved salts to the surface. The water evaporates and the salts are left
behind, creating a white crustal layer that prevents air and water from
reaching the underlying soil.
8.
According to paragraph 9, the ground’s absorption of excess water is a factor
in desertification because it can
○interfere with the irrigation of land
○limit the evaporation of water
○require more absorption of air by the soil
○bring salts to the surface
9.
All of the following are mentioned in the passage as contributing to
desertification EXCEPT
○soil erosion
○global warming
○insufficient irrigation
○the raising of livestock
Paragraph
10: The extreme seriousness of
desertification results from the vast areas of land and the tremendous numbers
of people affected, as well as from the great difficulty of reversing or even
slowing the process. Once the soil has been removed by erosion, only
the passage of centuries or millennia will enable new soil to form. In areas
where considerable soil still remains, though, a rigorously enforced program of
land protection and cover-crop planting may make it possible to reverse the
present deterioration of the surface.
10.
Which of the sentences below best expresses the essential information in the highlighted sentence
in the passage? Incorrect choices change the meaning in important ways or leave
out essential information.
○Desertification is a significant problem because it is
so hard to reverse and affects large areas of land and great numbers of people.