Multiple Choice
Mercury is pockmarked with meteorite craters, while the Earth is not because:
A) the Earth is farther from the Sun than Mercury.
B) tectonic activity and erosion have obliterated the craters on Earth.
C) the Earth's surface was liquid when the great meteorite showers fell.
D) meteorites didn't strike the Earth.
Correct Answer:

Verified
Correct Answer:
Verified
Q10: Comets are composed mainly of:<br>A) rock and
Q11: At the present time, the Moon's maria
Q12: The rings of Saturn are believed to
Q13: The craters found on Callisto are very
Q14: Europa is a moon of _.
Q16: Both Uranus and Neptune:<br>A) can be seen
Q18: Mercury orbits around the Sun in about
Q19: The major reason that the surface of
Q40: The tens of thousands of small orbiting
Q55: Venus is much hotter than Earth because