answersLogoWhite

0

21%

User Avatar

Wiki User

13y ago

What else can I help you with?

Related Questions

What is the most of the oxygen that is found in the atmosphere today?

The most of the oxygen in the Earth's atmosphere today comes from photosynthesis by plants and other photosynthetic organisms. They convert carbon dioxide into oxygen as a byproduct, which accounts for approximately 20.95% of the atmosphere.


What was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere have today?

The evolution of photosynthetic bacteria and later on, plants, was responsible for changing the formerly poisonous atmosphere to an oxygen-rich one we have today. These organisms released oxygen as a byproduct of photosynthesis, gradually increasing levels of oxygen in the atmosphere.


What caused the proportion of oxygen in the atmosphere to increase?

Plants started to grow on the earth, plants breath in carbon dioxide (which is why it decreased so much) and they breath out oxygen. That is why the percentage of oxygen has increased so much.


Where does the oxygen in the ocean from?

In oceans, Oxygen gets dissolved in a very small proportion from the atmosphere. This process is very gradual. Oxygen also comes from the aquatic plants present in the water bodies.


Why earths atmosphere today contains more oxygen than earth atmosphere?

The increased oxygen levels in Earth's atmosphere today compared to earlier in its history are due to the evolution and proliferation of photosynthetic organisms like plants and cyanobacteria. These organisms release oxygen as a byproduct of photosynthesis, gradually increasing its concentration in the atmosphere over millions of years.


How oxygen is your atmosphere?

The atmosphere today is about 21% oxygen. In former times it was different percentages. In dinosaur days, it was closer to 30%, which was a factor in animals growing as big as they did.


How much percent oxygen present in your atmosphere?

the percentage of oxygen in the atmosphere today is about 20.95%. Or... if you round it you get the most common answer of 21%.


How was oxygen added to the earths atmosphere?

Oxygen was added to Earth's atmosphere through the process of photosynthesis by early photosynthetic organisms like cyanobacteria. These organisms released oxygen as a byproduct, which accumulated over millions of years and eventually led to the oxygen-rich atmosphere we have today.


How did the primitive atmosphere differ from atmosphere today?

As opposed to today's atmosphere, the Earth's early atmosphere would have been quite impossible for human life to thrive in. Today the atmosphere consists primarily of Nitrogen, Oxygen, and Carbon Dioxide, but early Earth's first atmosphere was probably made of Hydrogen and Helium.


How the did primitive atmosphere differ from your atmosphere today?

As opposed to today's atmosphere, the Earth's early atmosphere would have been quite impossible for human life to thrive in. Today the atmosphere consists primarily of Nitrogen, Oxygen, and Carbon Dioxide, but early Earth's first atmosphere was probably made of Hydrogen and Helium.


How did the primitive atmosphere differ from the atmosphere today?

As opposed to today's atmosphere, the Earth's early atmosphere would have been quite impossible for human life to thrive in. Today the atmosphere consists primarily of Nitrogen, Oxygen, and Carbon Dioxide, but early Earth's first atmosphere was probably made of Hydrogen and Helium.


What were two of the dominant gases in Earth's second atmosphere?

Oxygen and nitrogen were two dominant gases in Earth's second atmosphere. Oxygen levels were much lower than they are today, while nitrogen constituted a significant portion of the atmosphere even then.