air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our
solar system known to harbor life. Circling the Sun at an average distance of 149 million kilometers ( 93
million miles ), Earth is the third planet from the Sun and the fifth largest planet in the solar system.
Our planet’s rapid spin and molten nickel-iron core give rise to an extensive magnetic field which, coupled
the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars.
Earth’s atmosphere protects us from meteors as well, most of which burn up in the Earth’s atmosphere before
they can strike the surface. The planet active geological processes have left no evidence of the ancient pelting
it almost certainly received soon after it formed about 4.6 billion years ago.
The Earth has a single natural satellite – the moon.
Question 36: Approximately how much of the Earth’s atmosphere is nitrogen?


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a. One-fourth

b. One-half

c. Three-fourths

d. All of it

Question 37: Which of the following helps to create the Earth’s magnetic fields?
a. Its blue waters

b. Its nitrogen atmosphere

c. Its molten metal core

d. The moon

Question 38: What two factors help protect the Earth from radiation?


c. devastating in nature

d. characteristics that set it apart from other planets

Question 42: It’s probable that the next paragraph would discuss __.
a. people on planets

b. the solar system as a whole

c. rings around Saturn

d. the Earth’s natural satellite – the moon

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct
answer to each of the questions from 42 to 50.
The White House, the official home of the United States president, was not built in time for George
Washington to live in it. It was begun in 1792 and was ready for its first inhabitants. President and Mrs.John
Adams, who moved in on November 1, 1800. When the Adamses moved in, the White House was not yet
complete, and the Adamses suffered many inconveniences; for example, the main staircase was incomplete,
which hindered movement from floor to floor, and the future laundry yard was merely a pool of mud, so wet
laundry was hung in the unfinished East Room to dry. Thomas Jefferson, the third president, improved the
comfort of the White House in many respects and added new architectural features such as the terraces on the
east and west ends.
When the British forces burned the White House on August 24, 1814, President Madison was forced
to leave.All the remained after the fire was the exterior walls, the interior was completely destroyed.It was not
until December of 1817 that the following president, James Monroe, was able to move into a rebuilt residence.
Since then, the White House has continued to be modified but has been continuously occupied by each
succeeding U.S president.



Question47: What of the White House was not yet complete when the Adamses moved in?
a. main staircase

b. laundry yard

c. pool

d. A and B

Question 48: The word “ forces” in line 9 could best be replaced by:
a. military

b.effort

c. power

d. energy

Question 49: According to the passage, when James Monroe came to the White House, it had
a. repressed

b. reconstructed

c. relocated

d. reserved

Question 50: The paragraph following the passage most likely discusses:
a. the details of the destruction of the White House by the British.