Comets are comparable to
A) mantle inclusions.
B) Earth's core.
C) igneous rocks.
D) dirty snowballs.
Question 2
Which of the following is a good analogy for planetesimal growth?
A) rolling a snowball on the ground to build a snowman
B) melting of a snowman on a warm sunny day
C) getting your tongue stuck on a frozen pipe
D) throwing a snowball through a heavy blizzard of snowflakes