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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 visual resolution would be required to determine the existence of intelligent life on Earth?
(a) 100 meters.
(b) 10 cm.
(c) 1 meter.
(d) 1,000 meters.

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

3. Which of the following does Sagan NOT cite as evidence for the age of the universe?
(a) Impact craters.
(b) Star evolution.
(c) Telemetric spectrometry.
(d) Radioactive dating.

4. What does Neptune's moon have less of compared to Titan?
(a) Ice.
(b) Potassium.
(c) Iron.
(d) Carbon.

5. Many of organic molecules arrived on Earth from what source?
(a) Meteors.
(b) Asteroids.
(c) Comets.
(d) Space dust.

Short Answer Questions

1. Mars apparently once had what resource?

2. Sagan describes humans as which of the following, with respect to their arrival in the universe?

3. About how long does Sagan suggest that human beings have been "settled down"?

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

5. The records on the Voyager craft are most like what type of information storage method?

(see the answer key)

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