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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. Where does Sagan think it is most likely that life will be found on Mars?
(a) On the surface.
(b) In the subsurface rock.
(c) In the ice at the poles.
(d) In salt caverns.

2. What is unusual about Uranus's orientation?
(a) It wobbles constantly.
(b) It shifts from time to time.
(c) It is the only planet that lies perfectly in the ecliptic.
(d) It is laid on its side.

3. What major component of the Voyager craft was threatened in Sagan's plan to take a distant picture of Earth?
(a) The spectral analyzer.
(b) The telemetry antenna.
(c) The vidicon system.
(d) The solar panel array.

4. What type of waves could be analyzed to demonstrate that there is intelligent life on Earth?
(a) Microwaves.
(b) Ultraviolet waves.
(c) Radio waves.
(d) Cosmic waves.

5. What means does Sagan suggest that humans use to represent and express their desire to wander?
(a) Adventures.
(b) Stories and symbols.
(c) Colonization.
(d) Trade.

Short Answer Questions

1. What type of missions does Sagan recommend in order to prepare to deal with Earth-bound asteroids?

2. What hazard threatened the Voyager craft in Sagan's plan to take a distant picture of Earth?

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

4. Sagan estimates that intelligent life might arise on average in one out of how many stars?

5. William Herschel, the discoverer of Uranus, had what unusual profession?

(see the answer key)

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