EVERYDAY SCIENCE

SCIENCE

EARTH SCIENCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
This forms when water vapor changes from gas directly to ice crystals on a surface when the temperature at which condensing would take place are at the freezing point or below.
A
dew
B
rain
C
snow
D
frost
Explanation: 

Detailed explanation-1: -Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals.

Detailed explanation-2: -For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor (gas) in the air without first melting into water. The opposite of sublimation is “deposition", where water vapor changes directly into ice-such a snowflakes and frost.

Detailed explanation-3: -Condensation is the process where water vapor becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapor. Condensation happens one of two ways: Either the air is cooled to its dew point or it becomes so saturated with water vapor that it cannot hold any more water.

Detailed explanation-4: -Under the above-mentioned conditions, when the dew point is below freezing, additional moisture condenses in the form of very little ice crystals. It’s known as frost. The moisture in the air condenses directly into a tiny ice crystal in this process.

Detailed explanation-5: -This occurs because the saturation vapor pressure for water is higher than the the saturation vapor pressure for ice. The result is that the ice crystals grow large enough to begin falling from the cloud. On the way down, the crystals may grow even larger as they contact supercooled droplets or other ice crystals.

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