Soal Latihan dan Jawaban Reading Comprehension 53

Friday, March 23rd, 2012 - reading comprehension

Glass is a remarkable substance made from the simplest raw materials. It can be

colored or colorless, monochrome or polychrome, transparent, translucent, or opaque.

It is lightweight impermeable to liquids, readily cleaned and reused, durable yet

fragile, and often very beautiful Glass can be decorated in multiple ways and its

(5)  optical properties are exceptional. In all its myriad forms – as table ware, containers,

in architecture and design – glass represents a major achievement in the history of

technological developments.

 

Since the Bronze Age about 3,000 B.C., glass lias been used for making various

kinds of objects. It was first made from a mixture of silica, line and an alkali such as

(10)  soda or potash, and these remained the basic ingredients of glass until the development

of lead glass in the seventeenth century. When heated, the mixture becomes soft and

malleable and can be formed by various techniques into a vast array of shapes and

sizes. The homogeneous mass thus formed by melting then cools to create glass, but in

contrast to most materials formed in this way (metals, for instance), glass lacks the

(15)  crystalline structure normally associated with solids, and instead retains the random

molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens

until rigid, but does so without setting up a network of interlocking crystals customarily

associated with that process. This is why glass shatters so easily when

dealt a blow. Why glass deteriorates over time, especially when exposed to moisture,

(20)  and why glassware must be slowly reheated and uniformly cooled after manufacture to

release internal stresses induced by uneven cooling.

 

Another unusual feature of glass is the manner in which its viscosity changes as it

turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or

“freeze” at specific temperatures glass progressively softens as the temperature rises,

(25)  going through varying stages of malleability until it flows like a thick syrup. Each stage

of malleability allows the glass to be manipulated into various forms, by different

techniques, and if suddenly cooled the object retains the shape achieved at that point.

Glass is thus amenable to a greater number of heat-forming techniques than most other

materials.

 

Reading Comprehension 53

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Your answers are highlighted below.
Question 1
Why does the author list the characteristics of glass in lines 1-5?
A
To demonstrate how glass evolved
B
To explain the purpose of each component of glass
C
To show the versatility of glass
D
To explain glassmaking technology
Question 2
The word "durable"' in line 3 is closest in meaning to
A
heavy
B
delicate
C
Plain
D
lasting
Question 3
What does the author imply about the raw materials used to make glass?
A
They are liquid
B
They were the same for centuries.
C
They are transparent
D
They are very heavy.
Question 4
According to the passage, how is glass that has cooled and become rigid different from most other rigid substances?
A
It has a random molecular structure.
B
It has an unusually low melting temperature.
C
It has an interlocking crystal network.
D
It has varying physical properties.
Question 5
The word "customarily" in line 17 is closest in meaning to
A
certainly
B
necessarily
C
usually
D
naturally
Question 6
The words "exposed to" in line 19 are closest in meaning to
A
subjected to
B
deprived of
C
chilled with
D
hardened by
Question 7
What must be done to release the internal stresses that build up in glass products during manufacture?
A
the glass must be reheated and evenly cooled.
B
The glass must be kept moist until cooled.
C
The glass must be shaped to its desired form immediately
D
the glass must be cooled quickly.
Question 8
The word "induced" in line 21 is closest in meaning to
A
lost
B
missed
C
joined
D
caused
Question 9
The word "it" in line 22 refers to
A
manner
B
viscosity
C
glass
D
feature
Question 10
According to the passage, why can glass be more easily shaped into specific forms than can metals
A
It gradually becomes softer as its temperature rises.
B
It has better optical properties.
C
It retains heat while its viscosity changes.
D
It resists breaking when heated
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