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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. Which of the following characteristics of Venus is LEAST similar to Earth's?
(a) Mass.
(b) Orbit.
(c) Gravitation.
(d) Size.

2. Earth will most likely lose contact with the Voyager probes when what happens?
(a) They pass the troposphere.
(b) Their radio transmitters die.
(c) Their solar cells die.
(d) They reach the Kuiper belt.

3. What type of Mars mission did President Reagan turn down?
(a) A one-way colonization mission.
(b) A manned orbital mission.
(c) A robotic colony-building mission.
(d) A joint mission with the Soviets.

4. What space probe was an important part of Sagan's career, and passed by a major planet in 1976?
(a) Ion.
(b) Tesla.
(c) Newton.
(d) Viking.

5. What planet represents the farthest distance from Earth that the Voyager craft were intended to function at?
(a) Mars.
(b) Jupiter.
(c) Uranus.
(d) Saturn

Short Answer Questions

1. How likely does Sagan think it is that the records on Voyager will eventually be found?

2. What strange motion do all of the stars in the sky exhibit?

3. Sagan says that the dark matter that surrounds the Milky Way galaxy takes what shape?

4. What abstract concept does Sagan specifically say he is optimistic about?

5. What does Sagan say the rings of Saturn composed of?

(see the answer key)

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