The relatively large amount of water found on Earth is believed to have come from:
A) the impact that produced the Moon.
B) water-rich comets.
C) Earth's brief migration outside the snow line.
D) the combination of primordial hydrogen with oxygen produced by green plants.

Question

Quizplus · Accepted Answer

The most widely accepted theory is that water was brought to Earth by comets during its early formation. These comets would have contained ice that melted upon impact with the hot surface of the young Earth, contributing to the formation of oceans and the water cycle.

The Relatively Large Amount of Water Found on Earth Is