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Why does humidity affect how weather feels?

Answer and explanation

Correct answer: Because it affects evaporation of sweat

Correct answer: A. The human body loses heat partly when sweat evaporates from the skin. Evaporation needs energy, and that energy is taken from the skin, producing a cooling effect. When air humidity is high, it already contains a relatively large amount of water vapour, so evaporation from wet skin generally becomes slower. Sweat then remains on the skin longer, and the weather may feel hotter, sticky, or uncomfortable. In drier air, sweat can evaporate more readily and cooling is usually more effective. Option A is correct. Options B, C, and D are wrong because humidity does not directly change Earth’s rotation, remove mountains, or alter the length of a day. Memory cue: high humidity slows sweat evaporation and reduces evaporative cooling.

Related tags

GeographyHumidityHuman ComfortSweat EvaporationWeatherEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The Atmosphere

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