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. William Herschel, the discoverer of Uranus, had what unusual profession?
(a) Actor.
(b) Musician.
(c) Magician.
(d) Poet.

2. Earth will most likely lose contact with the Voyager probes when what happens?
(a) They pass the troposphere.
(b) Their radio transmitters die.
(c) They reach the Kuiper belt.
(d) Their solar cells die.

3. How many planets were known to ancient people?
(a) Five.
(b) Four.
(c) Six.
(d) Three.

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

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

Short Answer Questions

1. Which of the following is NOT one of the ways that early planets may have been made incapable of bearing life?

2. How likely does Sagan think it is that the records on Voyager will eventually be found?

3. Uranus has an unusual field around it of what type?

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

5. In the analogy Sagan makes in Chapter 5 the reader is asked to imagine they are seeing Earth from what perspective?

Short Essay Questions

1. What are the distinguishing characteristics of the planet Uranus?

2. What would be the first things an alien visitor to Earth would notice about the planet?

3. When this book was written, what was known about planets in other solar systems?

4. Briefly describe the progress made to undermine the geocentric theory.

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

6. How are the Voyager spacecraft able to travel quickly to distant planets?

7. How has the attitude of the Catholic church towards Galileo changed over time?

8. What may have happened to other planets from the early solar system?

9. What does the image of the "pale blue dot" suggest to Sagan?

10. What questions does Sagan say he intends to address in this book?

(see the answer keys)

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