The following passage contains TEN errors. Each indicated line
contains a maximum of ONE error. In each case, only ONE word is involved.
You should proofread the passage and correct it in the following
way: For a wrong word, underline the wrong
word and write the correct one in the blank provided at
the end of the
line. For a missing word, mark the position of the
missing word with a" ∧" sign and write the word
you believe to be
missing in the blank provided at the end of the line. For an
unnecessary word, cross out the unnecessary word with a slash "—" and put
the word in the
blank provided at the end of the line.
A summary of the physical and chemical nature of life must
begin, not on the Earth, but in the Sun, in fact, at the Sun’s very center.
It is here which is to be found the source of the energy that the Sun
constantly pours 41 ______ out into
space light and heat. This energy is librated at the center of
42 ______ the Sun as billions upon
billions of nuclei of hydrogen atoms collide with each other and fuse
together to form nuclei of helium, and doing
43 ______ so, relieve some of the energy that is
stored in the nuclei of atoms.
44 ______ The output of light and heat of the Sun requires that
some 600 million tons of hydrogen are converted into helium in the Sun every
second. 45
______ This the Sun has been doing for several thousands of millions of
year. The nuclear energy is released at the Sun’s center as
high-energy gamma radiation, a form of electromagnetic radiation like light
and radio waves, only of very much short wavelength. This gamma radiation
46 ______ is
absorbed by atoms inside the Sun to be reemitted at slight longer
47 ______ wavelengths. This
radiation, in its mm is absorbed and reemitte& As the energy filters
through the layers of the solar interior, it passes through the X-ray part of
the spectrum eventually becoming light. At this stage, it has reached that we
call the solar surface, and can escape into space
48 ______ without being absorbed further by solar atoms.
A very small fraction of the Sun’s light and heat are emitted in such
directions that after
49 ______ passing unhindering through interplanetary space, it
hits the Earth.
50 ______