2. The word identical in line 1 is closest in meaning to
(A) equally fast
(B) exactly alike
(C) near each other
(D) invisible
3. The word heart in line 4 is closest in meaning to
(A) center
(B) edge
(C) tail
(D) beginning
4. Why does the author mention the Giotto probe in paragraph 3?
(A) It had a relatively small and inconspicuous nucleus.
(B) It was very similar to an asteroid.
(C) It was covered with an unusual black dust.
(D) It provided visual evidence of the makeup of a comet's nucleus.
5. It can be inferred from the passage that the nucleus of a comet is made up of
(A) dust and gas
(B) ice and dust
(C) hydrogen gas
(D) electrically charged atoms
6. The word graphic in line 9 is closest in meaning to
(A) mathematical
(B) popular
(C) unusual
(D) vivid
7. Which of the following occurred as the ices from Halley's Comet evaporated?
(A) Black dust was left on the comet's surface.
(B) The nucleus of the comet expanded.
(C) The tail of the comet straightened out.
(D) Jets of gas caused the comet to increase its speed.
8. All of the following statements about the tails of comets are true EXCEPT:
(A) They can contain electrically charged or neutral particles.
(B) They can be formed only when there is sufficient heat.
(C) They are formed before the coma expands.
(D) They always point in the direction away from the Sun.
9. The word distinct in line 17 is closest in meaning to
(A) visible
(B) gaseous
(C) separate
(D) new
10. Compared to the tail of electrically charged atoms, the tail of neutral dust particles is
relatively
(A) long
(B) curved
(C) unpredictable
(D) bright
PASSAGE 65 BBADB DACCB
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