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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 the primary distinguishing feature that SETI looks for to identify a communication from an intelligent source?
(a) Prime Numbers.
(b) Design parameters.
(c) Repetition.
(d) Mathematical constants.

2. When does Sagan think that the human race will be "on its way"?
(a) When we begin colonizing other planets.
(b) When we reach another star.
(c) When we begin living in space.
(d) When we make contact with another intelligent species.

3. What unusual source of energy do the Voyager spacecraft take advantage of?
(a) Solar wind.
(b) Planetary gravity.
(c) Cosmic rays.
(d) Vacuum energy.

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

5. Sagan helped to discover that Saturn provides what critical element to Titan?
(a) A magnetosphere.
(b) Hydrogen.
(c) Tidal forces.
(d) Energy.

Short Answer Questions

1. Which of the following is NOT one of the ways that Sagan says life seems to be?

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

3. What type of Mars mission did President Reagan turn down?

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

5. When does Sagan predict that anti-matter will be mass-manufactured?

(see the answer key)

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