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How can a high amount of water vapour in air make weather feel?

Answer and explanation

Correct answer: More sultry or humid

Answer: B, more sultry or humid. The body cools partly when sweat evaporates from the skin. When the air already contains a high amount of water vapour, especially when relative humidity is high, evaporation from the skin becomes slower. Sweat may remain on the skin, but less of it changes into vapour quickly, so the body loses heat less effectively. The weather can therefore feel sticky, oppressive or sultry, even if the measured air temperature is not extremely high. A is wrong because moisture-rich air does not feel dry. C is unrelated to high water vapour in ordinary warm-weather conditions. D refers to dust, not humidity. The exact feeling also depends on temperature, wind and clothing, but humidity is the key factor in this question. Memory cue: humid air slows sweat evaporation and feels sticky.

Related tags

GeographyHumidityWeather ComfortEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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