Question

class 9 question science

Answer 1

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The answer is evaporation.

Due to heat in desert the water present in atmosphere evaporates and thus cools the atmosphere.

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Answer 2

A desert cooler cools better on a hot dry day because on a hot dry day temperature is high and humidity is less which are the factors of evaporation and helps in better evaporation. Due to the higher rate of evaporation it gives a better cooling effect on a hot dry day.

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