from nuclear fusion on the surface of the sun when it went nova, but it was also formed by plant life through the calvin cycle
Oxygen on Earth primarily exists in the form of diatomic oxygen (O2) in the atmosphere, where it makes up about 21% of the air we breathe. This oxygen comes from plants and photosynthetic organisms that release it as a byproduct of photosynthesis.
The oxygen molecule, the form of oxygen found in the Earth's atmosphere, is 100% oxygen. There fore it is the material that has the most oxygen in it.
Oxide
Silicon is abundant in the Earth's crust and combines with oxygen to form rocks and minerals, such as quartz and feldspar.
Alkali earth metals react with oxygen to form basic oxides.
first the earth is way closer to the sun plus earth only has oxygen
Yes, alkaline earth metals react with oxygen to form oxides. For example, magnesium reacts with oxygen to form magnesium oxide. This reaction typically results in the formation of a white or gray powder.
It is found in its diatomic elemental form in our atmosphere which contains 21% oxygen. Oxygen is also a component of water (H2O) which are also present in large quantities on Earth.
Oxygen in its pure, gasseous form, as usually encountered on Earth is an invisible gas and cannot be seen.
When oxygen was first released, it combined with iron in the Earth's crust to form iron oxide, which is also known as rust. This reaction caused a significant change in the composition of the Earth's surface, leading to the development of banded iron formations that are significant in studying Earth's history.
In the stratosphere, oxygen primarily exists in the form of O2 molecules, just like in the Earth's atmosphere. This molecular oxygen plays a crucial role in the absorption of harmful ultraviolet radiation from the sun, helping to protect life on Earth.
The troposphere layer contains the most oxygen. Stratosphere contains most of the ozone i.e. a form of oxygen.