0
Through the process of photosynthesis algae and later plants used the energy of sunlight to convert water and carbon dioxide into sugar and oxygen. Oxygen levels rose until they reached a high point of 36% about 300 million years ago. Climate shifts and changes in life on Earth later caused some of that oxygen to go back into carbon dioxide, which was sequestered in carbonate rocks, and oxygen levels began to fluctuate. Currently, oxygen levels are at about 21% but that may change over the next few million years.
What else can I help you with?
Describe how did oxygen come to make up to 21 percent of earths present atmosphere?
Oxygen accumulates in Earth's atmosphere from photosynthesis, where plants and algae convert carbon dioxide into oxygen. This process started with the emergence of photosynthetic organisms around 2.5 billion years ago, gradually increasing oxygen levels to the current 21 percent.
Where does earths atmosphere come from?
Plants
Where do these main gases come from?
they come from earths atmosphere and gases
Where did the gases in the earths atmosphere come from?
Scientist theorize that bacteria with chlorophyll in them slowly but surely began to multiply. And as they did, they photosynthesized enough to create an entire atmosphere. (as you know oxygen is a byproduct of photosynthesis)
What do we call pieces of stone that come into the earths atmosphere?
It is a meteorite (meteor).
Where does the free oxygen in Earths atmosphere come from?
The free oxygen in Earth's atmosphere primarily comes from the process of photosynthesis carried out by plants, algae, and certain bacteria. During photosynthesis, these organisms use energy from sunlight to convert carbon dioxide and water into oxygen and glucose.Approximately half of Earth's oxygen is produced by marine plants, specifically phytoplankton.
Can asteroids come in earths atmosphere?
Yes. Asteroids can enter earth's atmosphere. In such an event the asteroid will probably strike earth's surface.
Where did the oxygen in Earth's atmosphere come from originally?
The oxygen in Earth's atmosphere originally comes from the process of photosynthesis carried out by early photosynthetic organisms like cyanobacteria, which released oxygen as a byproduct. Over time, the accumulation of oxygen led to the development of an oxygen-rich atmosphere.
Where did most of earths atmospheric oxygen originally come from?
Most of Earth's atmospheric oxygen originally came from photosynthesis by early cyanobacteria and other photosynthetic organisms around 2.5 billion years ago. These organisms converted carbon dioxide and water into oxygen through the process of photosynthesis, gradually increasing oxygen levels in the atmosphere.
Where do the oxygen molecules in the atmosphere come from?
Oxygen molecules in the atmosphere primarily come from plants and other photosynthetic organisms that release oxygen during the process of photosynthesis. This process involves the conversion of carbon dioxide and water into glucose and oxygen. Additionally, a smaller amount of oxygen also comes from the breakdown of carbon dioxide molecules in the upper atmosphere by solar radiation.
Where does the oxygen that plants release into the atmosphere come from?
It is the Oxygen from the CO2 and H2O tat they use to make sugars.
Does air come from the sun?
No. Earth's atmosphere most likely originate from volcanic atmosphere. The oxygen is produced by plants.
