One particularly important collision in the early inner solar system about 100 million years after Earth's formation resulted in
A) the extinction of 70 % of the species then in existence on Earth, including the dinosaurs.
B) the formation of a secondary asteroid belt between the orbits of Earth and Venus.
C) the destruction of the planet Vulcan, which had an orbit inside the orbit of Mercury.
D) the formation of our Moon.

Question

Quizplus · Accepted Answer

The collision between Earth and a Mars-sized body, often referred to as Theia, is widely accepted to have led to the formation of our Moon. This event is a cornerstone of the giant-impact hypothesis, explaining many aspects of the Earth-Moon system.

One Particularly Important Collision in the Early Inner Solar System