Multiple Choice
What is the MOST probable heat source that produced extensive,maybe even total,melting of the Moon at an early stage in its history?
A) nuclear fusion reactions occurring in its core
B) intense sunlight from the early and very active Sun
C) tidal flexing and distortion caused by its motion around Earth
D) decay of radioactive elements within it and the impact energy of meteoritic bombardment
Correct Answer:

Verified
Correct Answer:
Verified
Q102: On which planetary body can distinct evidence
Q110: Where in the planetary system is the
Q310: We believe Mercury suffered a major collision
Q311: Suppose Mercury had 5-to-3 spin-orbit coupling and
Q312: One of the major differences between Earth
Q313: In 2010,the lunar orbiter Chandrayaan-1 discovered hydroxyl
Q314: Which scientific approach gives us the MOST
Q318: What is the "face" on Mars?<br>A) a
Q319: Which theory is now considered to be
Q320: MOST of the craters on the Moon