Why is there oxygen in Earth's atmosphere?

Anonymous

∙ 12y ago

Updated: 10/29/2022

The oxygen is the product of photosynthesis. Plants and algae use the energy of sunlight to turn water and carbon dioxide into sugar and oxygen. The plants use the sugar as food and turn some into cellulose to make cell walls. Oxygen is released into the atmosphere as a byproduct.

Sister Little ∙

Lvl 13

∙ 3y ago

What else can I help you with?

How much of the earths atmosphere is made up of nitrogen and oxygen?

The earths atmosphere is made up of 78% nitrogen and 21% oxygen

What percent of earths atmosphere is oxygen?

97%

Is most of the earths atmosphere covered with oxygen?

The primitave earths atmosphere did not contain?

Oxygen gas

The primative earths atmosphere did not contain?

Free oxygen

What is the major source of oxygen for the earths atmosphere is?

Plants

What gas was not part of early earths atmosphere?

oxygen

What are the primary gases found in earths atmosphere?

Nitrogen and oxygen,

Was the earths early atmosphere made up of mostly oxygen?

What describes the earths atmosphere?

mostly nitrogen with 21% oxygen

What was the major contributor of oxygen to earths early atmosphere?

photosynthsis

How much is the earth atmosphere is made up of nitrogen and oxygen?