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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 did ancient people notice about planets that set them apart from the stars?
(a) They had complex motions and were not fixed.
(b) They had unique colors.
(c) They grew closer from time to time.
(d) They were much larger.

2. What planet represents the farthest distance from Earth that the Voyager craft were intended to function at?
(a) Mars.
(b) Saturn
(c) Jupiter.
(d) Uranus.

3. What astronomical discovery did Galileo make that significantly damaged the geocentric theory?
(a) Jupiter has its own moons.
(b) Stars are stationary relative to the Earth.
(c) Planets move in ellipses.
(d) Gravity moves the planets.

4. What is the major difference between space exploration and human exploration in the past?
(a) It is much less costly, in relative terms.
(b) There is much more uncertainty in space.
(c) Humans cannot travel to the places they explore.
(d) It takes months or years to get to the destination.

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

Short Answer Questions

1. What hazard threatened the Voyager craft in Sagan's plan to take a distant picture of Earth?

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

3. Sagan suggest that modern religious thinking treats scientific evidence in what way?

4. The Anthropic Principle is divided into two theories that are termed what?

5. What strange motion do all of the stars in the sky exhibit?

(see the answer key)

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