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 material that humans have added to the environment would be easily detectable from space?
(a) Chlorofluorocarbons.
(b) Carbon dioxide.
(c) Methane.
(d) Plastics.

2. Which of the following is a major point opponents of space exploration raise?
(a) Space exploration exists for national prestige only.
(b) No good has ever come of space exploration.
(c) The problems on Earth should be solved first.
(d) There is nothing of value anywhere else in the solar system.

3. What does Sagan claim is the key element of humanity's future?
(a) Deep space travel.
(b) Faster than light travel.
(c) Distant worlds.
(d) Terraforming.

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

5. Sagan suggests that throughout history, many have claimed that our species is what?
(a) Essentially good.
(b) Irredeemable.
(c) Unique.
(d) Worthless.

Short Answer Questions

1. What scientist is credited with making the first discoveries that caused problems for the geocentric theory?

2. When probes enter the atmospheres of other planets, what color do they often see the sky to be?

3. Many of organic molecules arrived on Earth from what source?

4. Conditions of what type were extremely important in the creation of early life on Earth?

5. What is notable about pictures taken of the Earth from the moon?

Short Essay Questions

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

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

3. Describe the planet Neptune.

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

5. What undesirable features of human activity might be easily noticed from space?

6. How well can an asteroid's path be calculated?

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

8. What planets had been explored by human beings, at the time of the writing of this book?

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

10. Why does Saga say he is optimistic about the "human prospect"?

(see the answer keys)

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