Why is the nightside of Mercury so much colder (relatively speaking) than the dayside?
A. Mercury is in synchronous rotation, so the far side of Mercury never sees the Sun.
B. Mercury's lack of an atmosphere keeps the planet from retaining its surface heat.
C. Mercury's small size lets it cool quickly.
D. Mercury's magnetic field acts like a blanket on the planet's dayside.
Answer: B
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Which of the four Galilean moons is not differentiated?
A) Io B) Europa C) Ganymede D) Callisto E) None of the above. All the moons are differentiated.
Processed meteorites with low metal content probably are
A) leftover chunks of rock from the earliest period in the formation of the solar system. B) pieces of comets rather than of asteroids. C) chunks of a larger asteroid that was shattered by a collision. D) chunks of rock chipped off the planet Mercury. E) chunks of rock chipped off the planet Mars.
Which is the most efficient means of recording light?
A. photographic films B. photomultiplier tubes C. the human eye D. charge-coupled device (CCD)
How do glaciers affect underlying rock?
What will be an ideal response?