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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 21, To The Sky!, Chapter 22, Tiptoeing Through the Milky Way.

Multiple Choice Questions

1. When probes enter the atmospheres of other planets, what color do they often see the sky to be?
(a) Black.
(b) Yellow.
(c) Blue.
(d) Red.

2. When did a "disrupted" comet famously fall into Jupiter?
(a) 1982.
(b) 1964.
(c) 1994.
(d) 2000.

3. What element does Sagan say motivated the space programs of the 60s and 70s?
(a) Scientific endeavor.
(b) Brinksmanship.
(c) Curiosity.
(d) Nationalism.

4. How well does Sagan say his typical audience handles the practical details of a Mars mission?
(a) They are hopelessly incapable of dealing with them.
(b) They are well-connected and able to deal with the details.
(c) They are uninterested in the details.
(d) They are meticulous thinkers on the subject.

5. In what way is Titan's cold atmosphere an advantage for the formation of life?
(a) It protects its inner core from tidal forces.
(b) It provides shields the moon from solar rays.
(c) It causes molecules to stay on its surface.
(d) It helps certain compounds form quickly.

Short Answer Questions

1. What is an astronomical unit?

2. Sagan says that the moon was once understood as a symbol of which of the following?

3. When was Neptune discovered?

4. What does Neptune's moon have less of compared to Titan?

5. When were the Voyager spacecraft launched?

(see the answer key)

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