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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 was the state of the knowledge and belief about life on other planets at the time the book was written?
(a) No signs of life were known to exist.
(b) Most believed life on other planets was impossible.
(c) It was believed there was abundant life on Mars.
(d) Scientists expected to find life on most of the planets and moons.

2. What moon was found to have volcanoes?
(a) Io.
(b) Terpsichore.
(c) Europa.
(d) Persephone.

3. What is the primary way that humans add carbon dioxide to the atmosphere?
(a) Carburetor emissions.
(b) Burning fossil fuels.
(c) Heavy industry byproducts.
(d) Drilling for natural gas and oil.

4. What form do the materials that planets emerge from take before they coalesce into proto-planets?
(a) A cloud.
(b) A star.
(c) A sphere.
(d) A disc.

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

Short Answer Questions

1. Which planet was Voyager 2 intended to visit first?

2. What type of asteroids does Sagan suggest that men might be able to live inside of?

3. When probes enter the atmospheres of other planets, what color do they often see the sky to be?

4. How old does Sagan state that "fundamentalist monotheists" believe the Earth to be?

5. What does Sagan suggest that cavemen were usually looking for when they wandered?

(see the answer key)

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