Visitors from Space Comprehension

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

10. A comet starts out as ______.

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

11. The tails of comets are made of ______.

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

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

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

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

14. What is a comet tail?

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