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Both. Hail is typically formed in the summer by thunderstorms, where the upper atmosphere gets really cold. Sleet is frozen rain formed in the winter usually, where snow melts, then re-freezes.
Rain, hail, and snow are all forms of precipitation which is part of the water cycle. The temperature of the upper atmosphere determines what form the precipitation will be.
See "In what layer of the atmosphere do you find the ozone layer?" in the "Related questions" section below.
Chlorine radicals are formed by CFC's. They deplete the ozone layer.
Chlorofluorocarbon (CFC) gases used in refrigeration
The ozone is found and formed in the atmosphere. It is formed in the stratosphere.
The upper layer of the atmosphere is formed by ozone layer. This is a layer of ozone gas.
Both. Hail is typically formed in the summer by thunderstorms, where the upper atmosphere gets really cold. Sleet is frozen rain formed in the winter usually, where snow melts, then re-freezes.
ionesphere
Tornadoes are formed in the troposphere
Ozone is formed by UV rays. They are rays from the sun.
When the ozone layer is formed, the life forms evolved. They were not possible earlier.
Rain, hail, and snow are all forms of precipitation which is part of the water cycle. The temperature of the upper atmosphere determines what form the precipitation will be.
See "In what layer of the atmosphere do you find the ozone layer?" in the "Related questions" section below.
Chlorine radicals are formed by CFC's. They deplete the ozone layer.
Chlorofluorocarbon (CFC) gases used in refrigeration
The ozone hole in formed in the stratosphere region of the atmosphere. It is because most of the ozone is present in that layer.