A main difference between asteroids and comets is that asteroids are mostly made of rock and comets are mostly made of
A) Metals
B) Carbon compounds
C) Ice
D) Water vapor
E) Astronomers don't really know what comets are made of
Answer: C
A main difference between asteroids and comets is that asteroids are mostly made of rock and comets are mostly made of
A) Metals
B) Carbon compounds
C) Ice
D) Water vapor
E) Astronomers don't really know what comets are made of