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

Question 1ExpertLevel 89

What is the real reason for low visibility in fog?

ATiny droplets scatter lightBOxygen disappears from the atmosphereCAir turns blackDGround suddenly rises

Question 2ExpertLevel 89

In which condition will frost not form but dew may form?

ASurface is below freezing and air is moistBSurface is cooled to dew point but remains above freezingCAir is completely dryDSurface is very hot and dry

Question 3ExpertLevel 89

Why can fog become denser in urban areas?

ABecause pollutant particles provide condensation nucleiBBecause cities never have moistureCBecause buildings completely remove airDBecause roads consume clouds

Question 4ExpertLevel 89

Why will little dew form even if a surface cools strongly when the air is very dry?

ABecause water vapour availability is lowBBecause dry air is always saturatedCBecause condensation is not impossible in dry airDBecause dew forms only in the Himalayas

Question 5ExpertLevel 89

Which criterion is most useful in practical weather observation to distinguish fog from mist?

AColourBVisibility rangeCTaste of dropletsDGround height only

Question 6ExpertLevel 89

Why does dew formation decrease when clouds cover the sky at night?

AClouds reduce cooling by trapping terrestrial longwave radiationBClouds remove all moisture from airCClouds necessarily make the ground below freezingDClouds destroy condensation nuclei

Question 7ExpertLevel 89

What is the main difference between frost and snowfall?

AFrost forms by deposition on surfaces, snowfall falls from cloudsBFrost always falls with rainCSnowfall forms only on grassDThere is no difference between them

Question 8ExpertLevel 89

Why does dew disappear quickly after sunrise?

ABecause droplets freeze into frostBBecause solar heat evaporates the dropletsCBecause gravity disappears in airDBecause dew chemically changes into soil

Question 9ExpertLevel 89

If a hill station has a cold, clear, calm night with moist air, which surface condensation is most likely in the morning?

ADust stormBHailstormCDew or frostDSea smoke

Question 10ExpertLevel 89

Which statement gives the required physical condition for fog formation most accurately?

AAir is fully hot and dryBMoistureless air blows fastCSurface is always covered with snowDLower air becomes saturated and filled with tiny droplets

Question 11ExpertLevel 89

On which surface can frost be more clearly visible?

ACold grass and leavesBHot sandy plainCSunlit wall at noonDWarm seawater

Question 12ExpertLevel 89

Why does rainfall not occur despite droplets being present during mist?

ABecause droplets are very tiny and remain suspendedBBecause droplets become stonesCBecause droplets contain no waterDBecause mist forms only underground

Question 13ExpertLevel 89

If frost warning is issued for a field, why may farmers use light irrigation or smoke at night?

ATo make soil completely dryBTo reduce excessive surface coolingCTo always remove moisture from airDTo stop rainfall

Question 14ExpertLevel 89

Which common condition is necessary for dew, frost, fog, and mist?

ASufficient water vapour and coolingBAlways rainfall and lightningCAlways strong hot windDAlways desert dust

Question 15ExpertLevel 89

Which statement explains the difference between fog and mist most scientifically?

AFog has denser droplets and reduces visibility moreBMist is always ice crystalsCFog forms only at noonDMist is never seen near ground

Question 16ExpertLevel 89

Why may more dew appear on an exposed car roof at night than under a tree?

AThe tree creates vapour and stops dewBThe exposed surface cools more by radiationCThe car roof creates cloudsDThe tree removes gravity

Question 17ExpertLevel 89

If water vapour first condenses as liquid on a cold surface and then freezes, what may the result be called?

AOrdinary dewBFrozen dewCSea mistDDust rain

Question 18ExpertLevel 89

Which form is more clearly present in air near the ground rather than on the ground surface?

ADewBFrostCFogDFrozen dew

Question 19ExpertLevel 89

A thin whitish haze lies above a road in the morning, but visibility is not severely reduced. What does it indicate?

ADense fogBMistCFrostDHailstorm

Question 20ExpertLevel 89

Why is moisture alone not enough for fog formation?

AAir must also cool to saturationBAir must become completely fireCSurface must always become lavaDAir pressure must vanish

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

Quiz this set

What is the real reason for low visibility in fog?

In which condition will frost not form but dew may form?

Why can fog become denser in urban areas?

Why will little dew form even if a surface cools strongly when the air is very dry?

Which criterion is most useful in practical weather observation to distinguish fog from mist?

Why does dew formation decrease when clouds cover the sky at night?

What is the main difference between frost and snowfall?

Why does dew disappear quickly after sunrise?

If a hill station has a cold, clear, calm night with moist air, which surface condensation is most likely in the morning?

Which statement gives the required physical condition for fog formation most accurately?

On which surface can frost be more clearly visible?

Why does rainfall not occur despite droplets being present during mist?

If frost warning is issued for a field, why may farmers use light irrigation or smoke at night?

Which common condition is necessary for dew, frost, fog, and mist?

Which statement explains the difference between fog and mist most scientifically?

Why may more dew appear on an exposed car roof at night than under a tree?

If water vapour first condenses as liquid on a cold surface and then freezes, what may the result be called?

Which form is more clearly present in air near the ground rather than on the ground surface?

A thin whitish haze lies above a road in the morning, but visibility is not severely reduced. What does it indicate?

Why is moisture alone not enough for fog formation?

Quiz result

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

Quiz this set

What is the real reason for low visibility in fog?

In which condition will frost not form but dew may form?

Why can fog become denser in urban areas?

Why will little dew form even if a surface cools strongly when the air is very dry?

Which criterion is most useful in practical weather observation to distinguish fog from mist?

Why does dew formation decrease when clouds cover the sky at night?

What is the main difference between frost and snowfall?

Why does dew disappear quickly after sunrise?

If a hill station has a cold, clear, calm night with moist air, which surface condensation is most likely in the morning?

Which statement gives the required physical condition for fog formation most accurately?

On which surface can frost be more clearly visible?

Why does rainfall not occur despite droplets being present during mist?

If frost warning is issued for a field, why may farmers use light irrigation or smoke at night?

Which common condition is necessary for dew, frost, fog, and mist?

Which statement explains the difference between fog and mist most scientifically?

Why may more dew appear on an exposed car roof at night than under a tree?

If water vapour first condenses as liquid on a cold surface and then freezes, what may the result be called?

Which form is more clearly present in air near the ground rather than on the ground surface?

A thin whitish haze lies above a road in the morning, but visibility is not severely reduced. What does it indicate?

Why is moisture alone not enough for fog formation?

Quiz result

Analytics choices