Multiple Choice
The Moon probably formed:
A) out of a collision between the Earth and a Mars-sized object
B) when the Earth's gravity captured a planetesimal
C) when the accretion disk around the Earth fragmented
D) when planetesimals collided to form a more massive object
E) when a piece of Earth broke off and entered orbit
Correct Answer:

Verified
Correct Answer:
Verified
Q19: How do astronomers explain the basic difference
Q27: The solid form of a volatile material
Q38: How did the formation of our Moon
Q40: Explain why most of the extrasolar planets
Q55: Hundreds of extrasolar planets have been detected
Q56: What property of an extrasolar planet can
Q60: Most planets currently found around other stars
Q63: According to the conservation of angular momentum,
Q87: Explain how astronomers use the Doppler effect
Q100: Comets and asteroids are<br>A) other names for