Soal Latihan dan Jawaban Reading Comprehension 72

Monday, March 26th, 2012 - reading comprehension

The geology of the Earth’s surface is dominated by the particular properties of

water. Present on Earth in solid, liquid, and gaseous states, water is exceptionally

reactive. It dissolves, transports, and precipitates many chemical compounds and is

constantly modifying the face of the Earth.

 

(5) Evaporated from the oceans, water vapor forms clouds, some of which are

transported by wind over the continents. Condensation from the clouds provides the

essential agent of continental erosion: rain. Precipitated onto the ground, the water

trickles down to form brooks, streams, and rivers, constituting what is called the

hydrographic network. This immense polarized network channels the water toward a

(10) single receptacle: an ocean. Gravity dominates this entire step in the cycle because

water tends to minimize its potential energy by running from high altitudes toward the

reference point that is sea level.

 

The rate at which a molecule of water passes though the cycle is not random but is

a measure of the relative size of the various reservoirs. If we define residence time as

(15) the average time for a water molecule to pass through one of the three reservoirsatmosphere,

continent, and ocean-we see that the times are very different. A water

molecule stays, on average, eleven days in the atmosphere, one hundred years on a

continent and forty thousand years in the ocean. This last figure shows the importance

of the ocean as the principal reservoir of the hydrosphere but also the rapidity of water

(20)  transport on the continents.

 

A vast chemical separation process takes places during the flow of water over the

continents. Soluble ions such as calcium, sodium, potassium, and some magnesium are

dissolved and transported. Insoluble ions such as aluminum, iron, and silicon stay

where they are and form the thin, fertile skin of soil on which vegetation can grow.

(25) Sometimes soils are destroyed and transported mechanically during flooding. The

erosion of the continents thus results from two closely linked and interdependent

processes, chemical erosion and mechanical erosion. Their respective interactions and

efficiency depend on different factors.

 

Reading Comprehension 72

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Your answers are highlighted below.
Question 1
The word "modifying" in line 4 is closest in meaning to
A
describing
B
traveling
C
destroying
D
changing
Question 2
The word "which" in line 5 refers to
A
oceans
B
compounds
C
continents
D
clouds
Question 3
According to the passage, clouds are primarily formed by water
A
evaporating from the oceans
B
being carried by wind
C
precipitating onto the ground
D
changing from a solid to a liquid state
Question 4
The passage suggests that the purpose of the "hydrographic network" (line 9) is to
A
prevent soil erosion caused by flooding
B
determine the size of molecules of water
C
regulate the rate of water flow from streams and rivers
D
move water from the Earth's surface to the oceans
Question 5
What determines the rate at which a molecule of water moves through the cycle, as discussed in the third paragraph?
A
The amounts of rainfall that fall on the continents
B
The effects of atmospheric pressure on chemical compounds
C
The relative size of the water storage areas
D
The potential energy contained in water
Question 6
The word "rapidity" in line 19 is closest in meaning to
A
significance
B
method
C
reliability
D
swiftness
Question 7
The word "they" in line 24 refers to
A
continents
B
soils
C
insoluble ions
D
soluble ions
Question 8
All of the following are example of soluble ions EXCEPT
A
calcium
B
potassium
C
iron
D
magnesium
Question 9
The word "efficiency" in line 28 is closest in meaning to
A
growth
B
influence
C
relationship
D
effectiveness
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