Forms of condensation: dew, frost, fog, and mist

Question 1ExpertLevel 89

If a desert night is very cold but the air is extremely dry, why will dew formation be limited?

ACondensation is never possible on sandBWater vapour amount is insufficientCTemperature never falls in dry airDDeserts have no night

Question 2ExpertLevel 89

Why may a steam-like mist appear over a lake on a cold morning?

AMoist air from warmer water condenses in cold airBLake water turns into fireCWater vapour becomes zero in cold airDFish create clouds

Question 3ExpertLevel 89

Which statement is most helpful in identifying frost?

AWhite ice crystals appear on the surfaceBOnly dust moves in airCVisibility reduces only at seaDWarm water flows on the surface

Question 4ExpertLevel 89

Why can wind speed help disperse fog?

AIt mixes saturated lower air and reduces droplet concentrationBIt turns off the SunCIt turns vapour into stonesDIt always keeps the surface below freezing

Question 5ExpertLevel 89

What may happen if temperature falls below freezing after dew has formed?

AThe dew will evaporate and disappearBThe dew may freeze to form frozen dewCThe dew will directly turn into water vapour and form cloudsDThe dew will be absorbed into the soil and become salt

Question 6ExpertLevel 89

In which condition is dew more likely than fog?

ASaturation is limited near the cold surface onlyBThe whole lower air is saturated deeplyCCold air is trapped in a valleyDVisibility has become very low

Question 7ExpertLevel 89

Why does visibility reduce in fog even though droplets are tiny?

ANumerous droplets repeatedly scatter lightBTiny droplets always increase lightCLight never reaches dropletsDDroplets empty the air

Question 8ExpertLevel 89

Which classification is correct on the basis of surface condensation and lower-air condensation?

ADew and frost are surface forms, fog and mist are lower-air formsBFog and mist are surface forms, dew and frost are high cloudsCAll are only high cloudsDAll are only precipitation

Question 9ExpertLevel 90

If on a clear night the surface cools to dew point but remains above freezing point which form is most likely?

ADewBFrostCFogDMist

Question 10ExpertLevel 90

If water vapour directly deposits as ice crystals on a very cold surface which form does it explain?

ADewBFrostCMistDFog

Question 11ExpertLevel 90

Why can fog persist longer in a valley during temperature inversion?

AUpper air removes all dropletsBNo water vapour remains in valleyCCold moist air is trapped below and mixing is reducedDSurface suddenly becomes very hot

Question 12ExpertLevel 90

Which meteorological criterion is most useful to distinguish mist from fog?

AColour of airBDaily trend of air pressureCSoil moistureDVisibility distance

Question 13ExpertLevel 90

What is the most correct role of clear sky in dew formation?

AIt increases radiational heat loss from the groundBIt heats the surface by the Sun at nightCIt removes water vapourDIt always makes air turbulent

Question 14ExpertLevel 90

If the night is clear but wind is very strong why can dew formation decrease?

AStrong wind turns vapour into iceBStrong wind prevents a stable cool moist layer near surfaceCStrong wind always keeps surface below dew pointDStrong wind creates clouds

Question 15ExpertLevel 90

What is the main mechanism of fog formation when warm moist air moves over cold land?

ASurface warming by evaporationBComplete absence of water vapourCAir reaching dew point by contact coolingDMelting of land surface

Question 16ExpertLevel 90

Which combined effect works when steam-like mist forms over a warm lake under cold air?

AComplete absence of moisture in cold airBOnly mechanical lifting of dustCSudden rise of salinityDEvaporation from warm water and condensation in cold air

Question 17ExpertLevel 90

What can be the role of tiny dust and smoke particles in urban fog?

AThey help droplet formation by providing condensation nucleiBThey destroy all moistureCThey make air completely dryDThey always increase visibility

Question 18ExpertLevel 90

Dew and frost may have the same water vapour source yet why are their final forms different?

AWater vapour has two different coloursBSurface temperature above or below freezing changes the stateCWater vapour has no role in dewDFrost forms only from dust

Question 19ExpertLevel 90

If fog is dense only over a river and not on nearby land what is the most suitable reason?

AThe river blocks water vapourBAir does not exist over landCThe river is a local moisture source and air above it is coolDThe river prevents fog formation

Question 20ExpertLevel 90

What is the most accurate physical reason for very low visibility in dense fog?

AAir pressure becoming zeroBSunlight ending completelyCBlack colour of water vapourDScattering of light by many tiny droplets

Forms of condensation: dew, frost, fog, and mist

Quiz this set

If a desert night is very cold but the air is extremely dry, why will dew formation be limited?

Why may a steam-like mist appear over a lake on a cold morning?

Which statement is most helpful in identifying frost?

Why can wind speed help disperse fog?

What may happen if temperature falls below freezing after dew has formed?

In which condition is dew more likely than fog?

Why does visibility reduce in fog even though droplets are tiny?

Which classification is correct on the basis of surface condensation and lower-air condensation?

If on a clear night the surface cools to dew point but remains above freezing point which form is most likely?

If water vapour directly deposits as ice crystals on a very cold surface which form does it explain?

Why can fog persist longer in a valley during temperature inversion?

Which meteorological criterion is most useful to distinguish mist from fog?

What is the most correct role of clear sky in dew formation?

If the night is clear but wind is very strong why can dew formation decrease?

What is the main mechanism of fog formation when warm moist air moves over cold land?

Which combined effect works when steam-like mist forms over a warm lake under cold air?

What can be the role of tiny dust and smoke particles in urban fog?

Dew and frost may have the same water vapour source yet why are their final forms different?

If fog is dense only over a river and not on nearby land what is the most suitable reason?

What is the most accurate physical reason for very low visibility in dense fog?

Quiz result

Forms of condensation: dew, frost, fog, and mist

Quiz this set

If a desert night is very cold but the air is extremely dry, why will dew formation be limited?

Why may a steam-like mist appear over a lake on a cold morning?

Which statement is most helpful in identifying frost?

Why can wind speed help disperse fog?

What may happen if temperature falls below freezing after dew has formed?

In which condition is dew more likely than fog?

Why does visibility reduce in fog even though droplets are tiny?

Which classification is correct on the basis of surface condensation and lower-air condensation?

If on a clear night the surface cools to dew point but remains above freezing point which form is most likely?

If water vapour directly deposits as ice crystals on a very cold surface which form does it explain?

Why can fog persist longer in a valley during temperature inversion?

Which meteorological criterion is most useful to distinguish mist from fog?

What is the most correct role of clear sky in dew formation?

If the night is clear but wind is very strong why can dew formation decrease?

What is the main mechanism of fog formation when warm moist air moves over cold land?

Which combined effect works when steam-like mist forms over a warm lake under cold air?

What can be the role of tiny dust and smoke particles in urban fog?

Dew and frost may have the same water vapour source yet why are their final forms different?

If fog is dense only over a river and not on nearby land what is the most suitable reason?

What is the most accurate physical reason for very low visibility in dense fog?

Quiz result

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