You should know what atoms compose the ozone molecule and the basic mechanism that produces and destroys ozone. Know why ozone is important in meterology, climatology, and biology. You should be familiar with typical concentrations of ozone over the tropics, midlatitude and polar regions and where most of the ozone resides in the atmosphere. Be able to define the ozone layer and the ozone hole and where geographically the ozone hole occurs. Know how human activities have affected ozone concentrations in the atmosphere.