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The Dew Point is the temperature at which the air is at 100% Relative Humidity. If the temperature fall below the Dew Point, then there is more moisture in the air than it can hold, and water condenses in the form of dew, mist, rain, etc.

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12y ago
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10y ago

The temperature at which the air is saturated with water vapour and condenses to form dew or frost.

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Q: What is the dew point and what happens when it falls below the dew point?
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Is it true that water usually condenses when air temperatures falls below dew point?

Water can start to condense from the air when the temperatures drop below the dew point. It happens when the ground is cold or when the air above the sky is cold.


At which point will a cloud form?

when the temperature of the rising air falls below the dew point


Describe what happens when air is cooled to its dew point?

The dew point is the varying temperature at which atmospheric humidity condenses. If the air temperature drops below the dew point, dew and condensation form.


What happens when air is cooled below its dew point without condensation?

supercooled


What will happen when the temperature falls further than the dew point temperature?

Cooling air below the dew point will result in the water in that air coming out of solution to deposit itself on surfaces. We call that dew. Certainly as the temperature continues to fall, it may even cause rain (if it isn't too cold).


What is the temperature at which more condensation then evaporation occurs?

Water vapour falls below the dew point (and comes out of solution in air).


What happens to the water vapor in the air when the air is cooled to its dew point?

When water vapor reaches its dew point it then becomes saturated. Either the vapor falls as rain, or if it is a cool clear night it forms as dew on surfaces. if the surface is cold enough it can also form as frost.


What happens when the dew point is below freezing?

When the dew point goes below freezing, the more applicable temperature is the frost point, at which water vapor will freeze out of the air. The frost point is higher than the dew point, because ice holds water molecules better than liquid water.


Why isn't dew point always the same?

The dew point is a measure of the amount of water vapor in the atmosphere. As the temperature gets closer to the dew point, the humidity rises. When the temperature finally drops to the dew point (100% humidity), the the atmosphere is completely saturated with water, and it will start to rain (or snow, if the dew point is below freezing). Since the atmosphere is completely saturated when the temperature is at the dew point, it cannot go below the dew point.


What happens to relative humidity as the air temperature drops below dew point?

It stays at 100%.


Explain the relationship between condensation and dew point?

Condensation and dew point have a great relationship. Condensation is what happens when dew point temperatures have been reached in an environment.


If the dew point temperature is below zero what will occur when air is chilled to the dew point?

frost will form on cold surfaces