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Why do the effects of water vapour appear more local compared with those of permanent gases?

Answer and explanation

Correct answer: Because its amount depends on local temperature and nearby moisture sources

Direct answer: D is correct. Water vapour is a variable gas, unlike the relatively stable major gases whose proportions change much less across the lower atmosphere. Its amount depends strongly on local oceans, lakes, rivers, vegetation, soil moisture, evaporation and temperature. Warm air can hold more water vapour, while cooling causes condensation, cloud formation and possibly rainfall. These processes can remove vapour from one place and add it to another, so humidity and its effects vary greatly from region to region. A is wrong because water vapour continually moves through the water cycle. B is wrong because permanent gases are distributed widely, not only at the poles. C is wrong because most atmospheric water vapour comes from evaporation on Earth. D correctly explains its local variability.

Related tags

Water VapourLocal WeatherVariable GasHumidityGeographyClass 11Covers The Accounting EquationRecording Of Transactions (I & Ii)

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