What is the ozone layer made out of?

Marshmallows.

The ozone layer is made mostly of nitrogen (as is the case with the entire atmosphere). The ozone layer is called that because there is just a higher concentration of ozone in that part of the atmosphere than is present in the rest of the atmosphere. Ozone is a molecule that is made up of three oxygen atoms bonded together. (The form of oxygen that we breathe is made up of only two oxygen atoms.)

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"Anonymous: This is completley wrong!!! the ozone layer is in the stratosphere it is made of ozone O3, if there were too much ozone at ground level we would die..."

Maybe you should do some research before you comment.

"Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly 78% nitrogen, 21% oxygen, 0.93% argon, 0.04% carbon dioxide, and trace amounts of other gases, in addition to water vapor. This mixture of gases is commonly known as air." (http://en.wikipedia.org/wiki/Earth%27s_atmosphere)

"The ozone layer, or ozonosphere layer (very rarely used term), is the part of the Earth's atmosphere which contains relatively high concentrations of ozone (O3). 'Relatively high' means a few parts per million - much higher than the concentrations in the lower atmosphere but still small compared to the main components of the atmosphere." (http://en.wikipedia.org/wiki/Ozone_layer)

So, the atmosphere in general is 78% nitrogen. The concentration of ozone in the ozone layer is only a few parts per million (ppm). Putting nitrogen content in terms of ppm gets us 780,000 ppm. So, as you can see even in the ozone layer, ozone really only constitutes a trace amount of the air. So, where am I wrong?

Ozone :)

the ozone is made mostly of nitrogen. the ozone is a molecule that is made up of three oxygen atoms bonded :) ^-^ by laura powers