Soal Latihan dan Jawaban Reading Comprehension 22

Wednesday, March 21st, 2012 - reading comprehension

During most of their lives, surge glaciers behave like normal glaciers, traveling perhaps

only a couple of inches per day. However, at intervals of 10 to 100 years, these glaciers

move forward up to 100 times faster than usual. The surge often progresses along a glacier

like a great wave, proceeding from one section to another. Subglacial streams of meltwater

(5)  water pressure under the glacier might lift it off its bed, overcoming the friction between ice

and rock, thus freeing the glacier, which rapidly sliders downhill Surge glaciers also might

be influenced by the climate, volcanic heat, or earthquakes. However, many of these

glaciers exist in the same area as normal glaciers, often almost side by side.

 

(10)  Some 800 years ago, Alaska’s Hubbard Glacier advanced toward the sea, retreated, and

advanced again 500 years later. Since 1895, this seventy-mile-long river of ice has been

flowing steadily toward the Gulf of Alaska at a rate of approximately 200 feet per year. In

June 1986, however, the glacier surged ahead as much as 47 feet a day. Meanwhile, a

western tributary, called Valerie Glacier, advanced up to 112 feet a day. Hubbard’s surge

(15)  closed off Russell Fiord with a formidable ice dam, some 2,500 feet wide and up to 800

feet high, whose caged waters threatened the town of Yakutat to the south.

 

About 20 similar glaciers around the Gulf of Alaska are heading toward the sea. If

enough surge glaciers reach the ocean and raise sea levels, West Antarctic ice shelves could

rise off the seafloor and become adrift. A flood of ice would then surge into the Southern

(20)  Sea. With the continued rise in sea level, more ice would plunge into the ocean, causing

sea levels to rise even higher, which in turn would release more ice and set in motion a vicious

cycle. The additional sea ice floating toward the tropics would increase Earth’s Albedo and

lower global temperatures, perhaps enough to initiate a new ice age. This situation appears

to have occurred at the end of the last warm interglacial (the time between glacations),

(25)  called the Sangamon, when sea ice cooled the ocean dramatically, spawning the

beginning of the Ice Age.

 

Reading Comprehension 22

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Question 1
 What is the main topic of the passage?
A
The causes and consequences of surge glaciers
B
The history of a particular surge glacier
C
The definition of a surge glacier
D
The classification of different types of surge glaciers
Question 2
The word “intervals” in line 2 is closest in meaning to
A
periods
B
records
C
speeds
D
distances
Question 3
The author compares the surging motion of a surge glacier to the movement of a
A
wave
B
fish
C
boat
D
machine
Question 4
Which of the following does the author mention as a possible cause of surging glaciers?
A
The occurrence of unusually large ocean waves
B
The pressure of meltwater underneath the glacier
C
The decline in sea levels
D
The shifting Antarctic ice shelves
Question 5
The word “freeing” in line 7 is closest in meaning to
A
releasing
B
strengthening
C
draining
D
pushing
Question 6
According to the passage, the Hubbard Glacier
A
has moved as fast as 47 feet per day
B
moves more often than the Valerie Glacier
C
is 800 feet wide
D
began movement toward the sea in 1895
Question 7
Yakutat is the name of
A
the last ice age
B
a surge glacier
C
an Alaskan town
D
an Antarctic ice shelf
Question 8
The word “plunge” in line 20 is closest in meaning to
A
drop
B
melt
C
extend
D
drift
Question 9
The term “vicious cycle” in lines 21-22 refers to the
A
movement pattern of surge glaciers
B
constant threat surge glaciers could pose to the Gulf of Alaska
C
effect surge glaciers could have on the temperature of tropical areas
D
effect that repeated rising sea levels might have on glacial ice
Question 10
The author provides a definition for which of the following terms?
A
Tributary (line 14)
B
Interglacial (line 24)
C
Albedo (line 22)
D
Ice dam (line 15)
Question 11
Which of the following statements is supported by the passage?
A
The next ice age could be caused by surge glaciers.
B
Normal glaciers have little effect on Earth’s climate.
C
Surge glaciers help to support Antarctic ice shelves.
D
The movement of surge glaciers can be prevented.
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