Pale Blue Dot: A Vision of the Human Future in Space Test | Mid-Book Test - Medium

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This test consists of 5 multiple choice questions, 5 short answer questions, and 10 short essay questions.

Multiple Choice Questions

1. 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) Gravity moves the planets.
(d) Planets move in ellipses.

2. Sagan describes humans as which of the following, with respect to their arrival in the universe?
(a) Early adopters.
(b) Middling achievers.
(c) Slow movers.
(d) Extreme latecomers.

3. Sagan compares the human need for religion to what?
(a) An injured person's need for aid.
(b) A blind person's need for a cane.
(c) A man's need for water.
(d) An infant's need for a parent.

4. Besides the Voyager spacecraft, what does Sagan cite as a major triumph by NASA?
(a) The moon landings.
(b) The Hubble Telescope.
(c) The Gemini project.
(d) The Mars rovers.

5. 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.

Short Answer Questions

1. Earth will most likely lose contact with the Voyager probes when what happens?

2. What is the most important thing that would immediately be apparent to any alien intelligence that found the Voyager probes?

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

4. What does Sagan say is an easy way to visually identify planets?

5. What unusual source of energy do the Voyager spacecraft take advantage of?

Short Essay Questions

1. How did ancient people know about the planets?

2. How could Dermott's calculations about Titan be confirmed?

3. What types of strategies are most practical for stopping an Earth-bound asteroid?

4. How is Venus similar to Earth?

5. What contributed to the formation of the first microbes on Earth?

6. What is unusual about the ring systems of the planets in our solar system?

7. As of 1990, what had the Voyager spacecraft achieved?

8. What promising signs does Mars have for being host to life?

9. What does Sagan say that it is probably the fate of humanity to "live in the dark"?

10. What location in the solar system either have or are believed to have once had volcanoes?

(see the answer keys)

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