Which process is responsible for the oxygen in the atmosphere today?
A)Photosynthesis
B)Outgassing of volcanoes
C)Weathering of carbonate rocks
D)Asteroid impact

Question

Quizplus · Accepted Answer

Photosynthesis by plants, algae, and some bacteria is responsible for the majority of the oxygen in the Earth's atmosphere today. Through photosynthesis, these organisms convert carbon dioxide and water into oxygen, which is released into the atmosphere. Outgassing of volcanoes and weathering of carbonate rocks also contribute to the Earth's atmospheric oxygen, but they are not the primary processes responsible for the high levels of oxygen in the atmosphere. Asteroid impact does not play a significant role in the generation of atmospheric oxygen.

Which Process Is Responsible for the Oxygen in the Atmosphere