The nitrogen in the Earth's atmosphere primarily came from:
A) ammonia delivered by comet impacts
B) photosynthesis done by algae and plants
C) oxidation of silicate rich minerals
D) rock delivered by asteroid impacts
E) its primary atmosphere

Question

Quizplus · Accepted Answer

Ammonia delivered by comet impacts is believed to have contributed to the nitrogen in Earth's atmosphere, as ammonia can break down to release nitrogen.

The Nitrogen in the Earth's Atmosphere Primarily Came From