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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 5, Is There Intelligent Life on Earth?, Chapter 6, The Triumph of Voyager.

Multiple Choice Questions

1. What does the Geocentric theory state?
(a) The sun moves around the Earth.
(b) The planets and heavens are all fixed.
(c) The Earth moves in a perfect circle.
(d) The Earth is a flat disc.

2. What major change have humans made to the environment that would be easily detectable from space?
(a) The pollution of rivers and lakes.
(b) Desertification.
(c) The Three-Gorges dam.
(d) The destruction of the rainforests.

3. At the time of the writing of this book, what is the farthest planet that humans had reached through the use of exploratory probes?
(a) Pluto.
(b) Uranus.
(c) Saturn.
(d) Neptune.

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

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

Short Answer Questions

1. Sagan compares the human need for religion to what?

2. Sagan says that which of the following is the most immediately obvious thing about the Earth?

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

4. In what century was the geocentric theory conclusively disproved?

5. Which of the following does Sagan NOT cite as evidence for the age of the universe?

(see the answer key)

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