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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 17, Routine Interplanetary Violence, Chapter 18, The Marsh of Camarina.

Multiple Choice Questions

1. What does Sagan say is an easy way to visually identify planets?
(a) Their movements.
(b) Their brightness.
(c) The color of their atmospheres.
(d) Their size.

2. What type of waves could be analyzed to demonstrate that there is intelligent life on Earth?
(a) Radio waves.
(b) Cosmic waves.
(c) Microwaves.
(d) Ultraviolet waves.

3. How old are the terrain features generated by Venus' volcanoes?
(a) 1 billion years.
(b) 2 billion years.
(c) 500 million years.
(d) 4 billion years.

4. What does the Geocentric theory state?
(a) The planets and heavens are all fixed.
(b) The Earth moves in a perfect circle.
(c) The Earth is a flat disc.
(d) The sun moves around the Earth.

5. Where does Sagan think it is most likely that life will be found on Mars?
(a) In salt caverns.
(b) In the subsurface rock.
(c) On the surface.
(d) In the ice at the poles.

Short Answer Questions

1. What is the primary way that humans add carbon dioxide to the atmosphere?

2. CFCs are chemicals that is primarily hazardous to the environment in what area?

3. What is notable about the Sun's light in Sagan's distant picture of the Earth?

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

5. According to Sagan, when viewed from space, how apparent would the existence of life on Earth be?

(see the answer key)

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