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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 17, Routine Interplanetary Violence, Chapter 18, The Marsh of Camarina.

Multiple Choice Questions

1. What scientist is credited with making the first discoveries that caused problems for the geocentric theory?
(a) Kelper.
(b) Ptolemy.
(c) Galileo.
(d) Copernicus.

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

3. What does Sagan suggest that cavemen were usually looking for when they wandered?
(a) Shelter.
(b) New territory.
(c) Mates.
(d) Food.

4. What was the name of the second mission that sent probes into the atmosphere of Venus?
(a) Hubble.
(b) Kepler.
(c) Brahe.
(d) Mariner.

5. Which of the following planets is NOT known to have a ring system?
(a) Uranus.
(b) Venus.
(c) Saturn.
(d) Jupiter.

Short Answer Questions

1. Why do some suggest capturing asteroids in Earth orbit?

2. Where does Sagan think it is most likely that life will be found on Mars?

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

4. What happens to the number of asteroids and comets in the solar system as time goes on?

5. Which of the following is one of the moons of Mars?

(see the answer key)

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