Visitors from Space Comprehension

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

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

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

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

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

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

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

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

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

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

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

A) past the farthest planet
B) behind the moon
C) around the sun
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) comets
B) boulders
C) asteroids
D) meteors

10. A comet starts out as ______.

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

11. The tails of comets are made of ______.

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

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

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

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

14. What is a comet tail?

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