Question

The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is
A. Frost
B. Black frost
C. Hoarfrost
D. Frozen dew

Answer 1

Hint: The moisture that occurs as a result of condensation is known as dew. Condensation is the process through which a material transforms from a gas to a liquid. Water changes from a vapour to a liquid, resulting in dew. As temperatures drop and objects cool, dew forms.

Complete answer:
Frost is a thin layer of ice formed when water vapour from an above-freezing atmosphere comes into contact with a solid surface that is below freezing, resulting in a phase shift from water vapour to ice as the water vapour hits the freezing point.
Black frost (also known as "killing frost") is a situation that occurs in crops when the humidity is too low for frost to form, but the temperature is low enough that plant tissues freeze and die, turning black, hence the nickname "black frost."
Hoarfrost is the formation of ice crystals on surfaces that are exposed to the air, such as grass blades, tree branches, or leaves. When air is reduced to the frost point by chilling, it is generated through direct condensation of water vapour to ice at temperatures below freezing.
The ice on the ground is called frost or frozen dew when temperatures dip below freezing and the temperature approaches the dew or frost point.

So the correct answer is option D

Note:
Dew is more prone to form in humid places, such as the warm, coastal tropics, than in desert ones. The amount of water vapour in the air is measured by humidity. Warm, humid air contains a lot of moisture, which can condense on colder nights.