Question

The discovery that the moon is similar in composition to the outer portions of the earth most supports the _____ theory.

Answer 1

That most supports what scientists call the impact theory

Answer 2

Answer: Giant-Impact Theory

Explanation:

There are many theories discussing the formation of moon. One of the most accepted theories is:

Giant-Impact theory which suggests that a Mars sized object collided with the Earth and the debris clumped together due to gravitational force and started orbiting earth which is now the Moon. Thus, the moon has similar composition as the outer portions of the Earth.