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

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

Multiple Choice Questions

1. What is the main component of the atmosphere of Venus?
(a) Hydrogen.
(b) Phosphate.
(c) Quicklime gas.
(d) Sulfuric acid.

2. What is the shape of the galaxy closest to the Milky Way?
(a) Globular.
(b) Spiral.
(c) Disc.
(d) Cluster.

3. Which of the following is NOT a major resource on Mars that makes it viable for "terraforming"?
(a) Sunlight.
(b) Carbon dioxide.
(c) Calcium deposits.
(d) Water.

4. CFCs are chemicals that is primarily hazardous to the environment in what area?
(a) The ozone-layer.
(b) The lithosphere.
(c) The biosphere.
(d) The stratosphere.

5. According to Sagan, what was the major advantage of the attitude of the government towards the Apollo project?
(a) There was plenty of funding for space.
(b) New propulsion systems were developed.
(c) Computers advanced in power rapidly.
(d) Rocket science progressed quickly.

6. Which of the following is one of the moons of Mars?
(a) Orpheus.
(b) Gilgamesh.
(c) Phobos.
(d) Hecuba.

7. According to Sagan, how profitable is it for a nation to invest in space exploration?
(a) It is highly profitable.
(b) It has great benefits in a limited scope.
(c) It has high costs.
(d) It is not related to a nation's welfare.

8. Sagan says that the moon was once understood as a symbol of which of the following?
(a) Madness.
(b) The unattainable.
(c) Prosperity.
(d) Fertility.

9. It is believed that some of Saturn's rings may eventually form into what?
(a) Asteroids.
(b) Comets.
(c) Meteors.
(d) Moons.

10. About how large a percentage of the mass of the total universe does dark matter make up?
(a) Thirty percent.
(b) Ninety percent.
(c) Five percent.
(d) Sixty percent.

11. What hazard from nuclear weapons causes "nuclear winter"?
(a) Smoke particles in the upper atmosphere.
(b) Cloud scattering.
(c) The erosion of land after plant life is wiped out.
(d) Acid rain.

12. In what year did humans visit the moon for the last time?
(a) 1969.
(b) 1979.
(c) 1972.
(d) 1975.

13. What is an astronomical unit?
(a) The distance that light travels in one minute.
(b) The distance from the sun to the Earth.
(c) The mean distance between stars.
(d) The radius of the solar system.

14. Why do some suggest capturing asteroids in Earth orbit?
(a) To mine them for resources.
(b) To use them as weapons.
(c) To use them as space stations.
(d) To study them.

15. What types of information does SETI analyze?
(a) Gravitational waves.
(b) Radio waves.
(c) Magnetic waves.
(d) Cosmic rays.

Short Answer Questions

1. What was the name of the mission that sent the first probes to Venus?

2. Sagan estimates that intelligent life might arise on average in one out of how many stars?

3. How well does Sagan say his typical audience handles the practical details of a Mars mission?

4. What type of government is Sagan most opposed to?

5. What country does Sagan believe is best suited for undertaking a terraforming effort?

(see the answer keys)

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