Soal Latihan dan Jawaban Reading Comprehension 13

Wednesday, March 14th, 2012 - reading comprehension

The wide variety of climates in North America has helped spawn a complex pattern of

soil regions. In general, the realm’s soils also reflect the broad environmental partitioning

into “humid America” and “arid America.” Where annual precipitation exceeds 20 inches

(50 centimeters),soils in humid areas tend to be acidic in chemical content, Since crops

(5)  do best in soils that are neither acidic(higher in acid content) nor alkaline(higher in salt

content).fertilization is necessary to achieve the desired level of neutrality between the

two. Arid America’s soils are typically alkaline and must be fertilized back toward

neutrality by adding acidic compounds. Although many of these dryland soils, particularly

in the Great Plains, are quite fertile, European settlers learned over a century ago that

(10)  water is the main missing ingredient in achieving their agricultural potential. In the

1970’s, certain irrigation methods were perfected and finally provided a real opportunity

to expand more intensive farming west from the Central Lowland into the drier portions

of the Great Plains. Glaciation also enhanced the rich legacy of fertile soils in the central

United States,both from the deposition of mineral-rich glacial debris left by meltwater

(15)  and from thick layers of fine wind-blown glacial material, called loess, in and around the

middle Mississippi Valley.

 

Natural vegetation patterns could be displayed on a map of North America, but the

enormous human modification of the North American environment in modern times has

all but reduced this regionalization scheme to the level of the hypothetical. Nonetheless,

(20)  the humid America-arid America dichotomy is still a valid generalization: the natural

vegetation of areas receiving more than 20 inches of water yearly is forest, whereas the

drier climates give rise to a grassland cover. The forests of North America tent to make

a broad transition by latitude. In the Canadian North, needle-leaf forests dominate, but

these coniferous trees become mixed with broadleaf deciduous trees as one crosses the

(25)  border into the Northeast United States. As one proceeds toward the Southeast, broadleaf

vegetation becomes dominant. Arid America mostly consists of short-grass prairies or

stepper. The only areas of true desert are in the Southwest.

 

Reading Comprehension 13

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Question 1
What aspect of North America does the passage mainly discuss?
A
Soil types and vegetation patterns
B
Improved irrigation methods and the expansion of agriculture
C
The wide variety of climates
D
The change in precipitation patterns
Question 2
The word “spawn ” in line 1 is closest in meaning to
A
distinguish
B
eliminate
C
create
D
protect
Question 3
The word “partitioning” in line 2 is closest in meaning to
A
opening
B
division
C
circulating
D
modification
Question 4
According to the passage, acidic soils tent to be associated with
A
a high salt content
B
large amounts of rain
C
glacial meltwater
D
an increase in farming
Question 5
The word “enhanced” in line 13 is closest in meaning to
A
increased
B
informed
C
implied
D
indicated
Question 6
How did glacial meltdown affect the soil in North America?
A
It redistributed the soil types
B
It added salt to the soil
C
It added minerals to the soil
D
It made the soil more neutral in content
Question 7
The phrase “this regionalization scheme” in line 19 refers to the
A
human modification of the North American environment
B
movements of glacial deposits
C
distinction between humid America and arid America
D
patterns of natural vegetation
Question 8
The word “transition” in line 23 is closest in meaning to
A
advantage
B
change
C
condition
D
elevation
Question 9
The passage supports which of the following statements?
A
Glaciation removed the fertile layer of soil from much of the Mississippi Valley
B
The accumulation of loess is primarily the result of irrigation
C
Arid America is not necessarily characterized by the presence of deserts
D
Most of Canada and the northeastern United States consists of short-grass prairies wherever natural vegetation has not been modified by humans
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