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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 13, The Gift of Apollo, Chapter 14, Exploring Other Worlds and Protecting This One.

Multiple Choice Questions

1. What does Sagan say is an easy way to visually identify planets?
(a) Their brightness.
(b) The color of their atmospheres.
(c) Their movements.
(d) Their size.

2. In what year did humans visit the moon for the last time?
(a) 1975.
(b) 1969.
(c) 1972.
(d) 1979.

3. What other medium was used to express the desire to wander, according to Sagan, as human civilization developed?
(a) Technology.
(b) Ethics.
(c) Law.
(d) Religion.

4. In the analogy Sagan makes in Chapter 5 the reader is asked to imagine they are seeing Earth from what perspective?
(a) Very close up.
(b) For the first time.
(c) From an immense distance.
(d) From a distorted frame of reference.

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

Short Answer Questions

1. What was the state of the knowledge and belief about life on other planets at the time the book was written?

2. What space probe was an important part of Sagan's career, and passed by a major planet in 1976?

3. Kuiper discovered that Titan has what chemical vital to the development of life?

4. What does Sagan claim is the key element of humanity's future?

5. What major change have humans made to the environment that would be easily detectable from space?

(see the answer key)

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