Visitors from Space Comprehension

1. The main purpose of this selection is to tell about________.

A) when the next solar system will appear in the universe
B) traveling comets that can change our lives
C) what comets are made of and how they move and change
D) how to become an astronomer and learn to write books.

2. This selection is most like an informational book because it _____.

A) took place long ago
B) is written in the first person
C) gives information about the solar system
D) tells how to make something

3. What does a comet look like in the sky?

A) a full moon
B) the sun
C) a group of stars
D) a flaming ball

4. Long ago, why did people think a comet was a warning of something bad?

A) Comets appeared in the sky suddenly.
B) Earthquakes and floods occurred after a comet appeared.
C) Bad things always happened after a comet appeared.
D) People did not understand comets.

5. The gas in the comet's coma can be compared to the gas in a ____________.

A) shooting star
B) solar wind
C) fluorescent light bulb
D) dirty snowball

6. Scientists who study the planets and stars are called ___.

A) dentists
B) doctors
C) astronomers
D) astronauts

7. Where do scientists think a huge cloud of comets might be?

A) behind the moon
B) past the farthest planet
C) around the sun
D) between the planets

8. The force that connects the solar system to the sun is called ______.

A) an asteroid
B) a coma
C) a planet
D) gravity

9. What is the name of the "flying rocks" in our solar system?

A) boulders
B) meteors
C) comets
D) asteroids

10. A comet starts out as ______.

A) a ball of frozen gases
B) a star
C) a large rock
D) chunks of ice

11. The tails of comets are made of ______.

A) dust
B) rocks
C) gas and dust
D) ice

12. What is the name for the orbits that comets take around the sun?

A) loops
B) years
C) periods
D) ellipses

13. What is one thing that makes a comet glow?

14. What is a comet tail?

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