Upper-level ozone is the product of the absorption of UVB rays by upper-atmosphere oxygen or O2. During the absorption process, the O2 molecule is split into two oxygen atoms. These atoms then recombine with an O2 molecule to create O3 or ozone.
The ozone layer in the upper atmosphere is therefore in a continual process of formation due to its constantl bombardment (during daylight hours) by UV radiation. But O3 concentrations don't continually increase because the ozone molecule is unstable and gradually deteriorates back to O2 or oxygen.
Ozone layer is formed of ozone. It is a gas.
See "How was the ozone layer formed?"
The upper layer of the atmosphere is formed by ozone layer. This is a layer of ozone gas.
Ozone layer is formed all over the earth. It is there in stratospheric layer.
See "How was the ozone layer formed?"
The ozone is found and formed in the atmosphere. It is formed in the stratosphere.
UV rays formed the ozone layer. They also destroyed the ozone.
Ozone layer is caused by natural processes. It is formed by UV.
The ozone layer is created in stratosphere. It is formed by the UV rays.
Ozone is in upper. It is because it is formed there.
Ozone layer is formed at a certain height. It is because of the factors that are responsible for its creation.
The ozone layer is formed by UV rays. It is also formed by thunder.