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

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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

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

2. What space probe was an important part of Sagan's career, and passed by a major planet in 1976?
(a) Ion.
(b) Newton.
(c) Viking.
(d) Tesla.

3. What fault does Sagan admit that science has?
(a) It is marred by human perception and arrogance.
(b) It can only develop theories, not laws.
(c) It fails to uplift human spirits.
(d) It is always inaccurate.

4. What means does Sagan suggest that humans use to represent and express their desire to wander?
(a) Colonization.
(b) Trade.
(c) Stories and symbols.
(d) Adventures.

5. Which of the following is NOT one of the ways that early planets may have been made incapable of bearing life?
(a) Falling into the sun.
(b) Being thrown into outer space.
(c) Being pushed into a distant orbit.
(d) Being heavily bombarded by meteors.

6. Kuiper discovered that Titan has what chemical vital to the development of life?
(a) Hexamine.
(b) Argon.
(c) Cytozine.
(d) Methane.

7. What visual resolution would be required to determine that humans are related to the intelligence on Earth?
(a) 10 meters.
(b) 1 meter.
(c) 1 cm.
(d) 10 cm.

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

9. What role does Sagan suggest that religion has played in the development of science?
(a) Religion has aided science in significant ways.
(b) Religiously-minded individuals often become scientists.
(c) Religion informs and guides scientific development.
(d) Science progressed in spite of religion.

10. When probes enter the atmospheres of other planets, what color do they often see the sky to be?
(a) Blue.
(b) Yellow.
(c) Black.
(d) Red.

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

12. According to Sagan, how do early Earth and Titan compare?
(a) They are similar.
(b) They are totally different.
(c) They are almost exactly the same.
(d) They are only vaguely related.

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

14. What major change have humans made to the environment that would be easily detectable from space?
(a) The Three-Gorges dam.
(b) Desertification.
(c) The destruction of the rainforests.
(d) The pollution of rivers and lakes.

15. The Voyager probes found large amounts of what element on Titan?
(a) Helium.
(b) Iridium.
(c) Oxygen.
(d) Nitrogen.

Short Answer Questions

1. In Chapter 5 Sagan asks the reader to imagine that they are which of the following?

2. As of 1990, how many moons did the Voyager craft explore?

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

4. Where does Neptune fall in the mission plan for the Voyager probes?

5. How much bigger is Neptune than Earth?

(see the answer keys)

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