Assertion (A) : The amount of moisture in the atmosphere is related to latitude. Reason (R) : The capacity to hold moisture in the form of water vapour is related to temperature.
✓ Correct answer: a) Both A and R are individually true and R is the correct explanation of A
ExplanationAssertion (A) is true : The amount of atmospheric moisture varies with latitude because temperature differenc- es across latitudes influence evaporation and condensation.Near the Equator, high temperatures increase evaporation rates, allowing the atmosphere to hold more water vapor, re- sulting in higher moisture content.In polar regions, lower temperatures reduce evaporation, leading to minimal moisture in the air.Reason (R) is true : The capacity of air to hold moisture is di- rectly related to its temperature.Warmer air has a greater ca- pacity to retain water vapor, while colder air can hold much less moisture.Since temperature is latitude-dependent, atmo- spheric moisture content is indirectly influenced by latitude.Reason (R) explains Assertion (A) : Because temperature, which is dependent on latitude, determines the air’s ability to hold water vapor.This explains the variation in atmospheric moisture content across latitudes, with tropical regions being more humid and polar regions drier.54
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