In Quest of the Universe, 5e: Explorations

Title Text: In Quest of the Universe, Fourth Edition

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Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor.

1: Mercury's rotation is such that
	A: its moon has a rotational period that is 2/3 of its orbital period around the planet.
	B: a point on its surface under the Sun at one perihelion position is opposite the Sun on the next.
	C: a Mercurian year lasts two Mercurian days.
	D: Mercury always keeps the same face toward the Sun due to the strong tidal interactions between these two objects.
	E: (Both B and C.)

2: Mercury is similar to our Moon. Which of the following statements about the numerous long cliffs (called scarps) seen on Mercury is correct?
	A: They were produced by impacts.
	B: They were the result of plate tectonics.
	C: The were formed by lava flows.
	D: They were formed after Mercury's crust was hardened and the planet shrank a bit.
	E: (None of the above. Scarps are seen only on the Moon.)

3: Planets X and Y are in a molten state and identical in all respects except that planet X has twice the volume of planet Y.
	A: Planet X will take twice as long to cool compared to planet Y.
	B: Planet Y will take twice as long to cool compared to planet X.
	C: Planet X will take 1.26 times as long to cool compared to planet Y.
	D: Planet X will take four times as long to cool compared to planet Y.
	E: Planet X will take eight times as long to cool compared to planet Y.

4: Venus is called Earth's "sister" planet. Which of the following is correct about its magnetic field?
	A: It is similar to Earth's.
	B: If it exists, it should not be as strong as Earth's.
	C: Even though Venus has a magnetotail, this is not due to its magnetic field.
	D: It is possible that Venus' magnetic field is in the process of reversing.
	E: (All of the above except A.)

5: Which of the following observations support(s) the idea that lava flows occur on Venus?
	A: Venus does not have as many craters as the Moon.
	B: We can see the flows using optical telescopes from space.
	C: There is no evidence for plate tectonics on Venus.
	D: Photographs of the planet's surface (taken by the former Soviet Union's Venera 13 spacecraft) show rocks whose shapes seem to fit together like pieces of a puzzle.
	E: (All of the above except B.)

6: The temperature of Venus' surface is very high. That is mainly because
	A: there are many active volcanoes on Venus.
	B: Venus is very close to the Sun.
	C: gases in Venus' atmosphere prevent the planet from cooling.
	D: of radioactive decay in the planet's core.
	E: (None of the above.)

7: Astronomers believe that a meteorite that may show signs of life came from Mars because
	A: its color is similar to the color of the Martian surface.
	B: the composition of the gas in the bubbles contained in the meteorite matches the composition of the Martian atmosphere.
	C: of the meteorite's trajectory when it entered our atmosphere.
	D: these signs are very different than what we see on Earth.
	E: (All of the above.)

8: The color of the Martian surface suggests that
	A: Mars is not highly differentiated.
	B: the planet has a small iron core.
	C: Mars has a molten core.
	D: the planet's core has a significant amount of sulfur.
	E: (The statement is misleading. The surface color cannot tell us anything about Mars.)

9: Which of the following observations suggest(s) that there may be a substantial amount of water on Mars?
	A: Features on the Martian surface appear to have formed from flowing water.
	B: Lakes and oceans of liquid water have been seen on the surface.
	C: Mars Odyssey has detected hydrogen on the planet's surface.
	D: High humidity has been measured in the planet's atmosphere.
	E: (Both A and C.)

10: Compared to Earth's atmosphere, the atmosphere of Mars is _____ and _____ in pressure.
	A: colder, higher
	B: colder, lower
	C: warmer, lower
	D: drier, higher
	E: warmer, higher

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