1. List the variable gases with short description: 2. What is meant by the “ hole” in the ozone layer? Where is it location? What role have chlorofluorocarbons (CFCs) played in this?

Ans:1 The air in our atmosphere has some variable components to it as well. These variable components include water vapor, dust particles, and ozone. Although these are found in small amounts, they can have significant effects on weather and climate. Water Vapor. The amount of water is the atmosphere varies between 1 and 4%..

Ans:2 An ozone hole is really not a hole but rather a thinning of the ozone layer in the stratosphere that changes seasonally. ... Once in the atmosphere, CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing chlorine atoms, which are able to destroy ozone molecules.The 'ozone holes' most commonly talked about are the depletions over Antarctica, forming each year in the months of September, October and November, due to a set of special meteorological and chemical conditions that arise at the South Pole, and can reach sizes of around 20 to 25 million sq km..

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