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If air is moist but the surface is not cold enough what problem will occur in dew formation?

Answer and explanation

Correct answer: The surface will not reach dew point

Moist air can provide water vapour, but dew does not form merely because moisture is present. The surface must lose enough heat to cool to its dew point. The dew point is the temperature at which the air next to the surface becomes saturated and condensation can begin. If the surface remains warmer than this temperature, the water vapour stays in the air and no dew is deposited there.

Therefore, option D is correct: the surface will not reach the dew point. The other choices do not describe the real process. Moisture does not automatically become frost, because frost requires freezing conditions; it does not have to travel to the sea, and sunlight does not suddenly stop. This shows why both humidity and suitable cooling are important in dew formation.

Related tags

DewDew PointCold Surface

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