The ozone layer is not composed of anything else. It is just composed of ozone molecules. read more
The “ozone layer “ is going to still be mostly N2 and O2 just like the atmosphere below it. What distinguishes it though is the higher concentration of ozone. read more
The ozone layer is one layer of the stratosphere, the second layer of the Earth’s atmosphere. The stratosphere is the mass of protective gases clinging to our planet. The stratosphere gets its name because it is stratified, or layered: as elevation increases, the stratosphere gets warmer. read more