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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. What is notable about the stars in Sagan's distant picture of the Earth?
(a) Very few are visible.
(b) An immense number are visible.
(c) They appear very close.
(d) They have many different colors.

2. What was Neptune's position in the solar system as of the writing of this book?
(a) It's position was uncertain.
(b) It was last.
(c) It was third to last.
(d) It was the last known planet.

3. Sagan says that the dark matter that surrounds the Milky Way galaxy takes what shape?
(a) A halo.
(b) A sphere.
(c) A disk.
(d) A column.

4. What strange motion do all of the stars in the sky exhibit?
(a) They change directions randomly.
(b) They move in identical tiny ellipses.
(c) They appear to drift towards the Earth.
(d) They tend to move towards each other.

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

Short Answer Questions

1. What is the major difference between space exploration and human exploration in the past?

2. How are chunks of Martian rock studied on Earth?

3. What fault does Sagan admit that science has?

4. What is the most important thing that would immediately be apparent to any alien intelligence that found the Voyager probes?

5. Which other nation besides the United States led the way in space exploration?

(see the answer key)

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