According to our present theory of solar system formation, how did Earth end up with enough water to make oceans?
A) The water was brought to the forming Earth by planetesimals that accreted beyond the orbit of Mars.
B) The water was brought to the forming Earth by planetesimals that accreted near Earth's orbit.
C) The water was formed by chemical reactions among the minerals in the Earth's core.
D) Earth formed at a distance from the Sun at which liquid water happened to be plentiful in the solar nebula.

Question

Quizplus · Accepted Answer

Water was likely delivered to Earth by planetesimals, such as comets or asteroids, that formed beyond the orbit of Mars where ice was more abundant.

According to Our Present Theory of Solar System Formation, How