Multiple Choice
The Oort cloud is ________.
A) an unusual type of cloud formed when meteorites strike the earth
B) another name for the inner solar system,just before the Sun became hot enough for nuclear fusion
C) the outer solar system where planetesimals,rocky debris and comets orbit outside beyond the outer planets but cross into the inner solar system at times
D) the asteroid belt
Correct Answer:

Verified
Correct Answer:
Verified
Q50: The earth is estimated to be approximately
Q51: Which of the following is not considered
Q52: Oceans cover slightly less than half of
Q53: Mechanisms that enhance or drive change are
Q54: A(n)_ system is one in which energy
Q56: The lithosphere and asthenosphere are layers of
Q57: Active mountain belts are most likely to
Q58: Which of the following is not a
Q59: All of the following are possible steps
Q60: Which of the following is not a