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

Question 1ExpertLevel 90

Why may a farmer consider irrigation or covering during a frost warning?

ATo protect the crop microclimate from extreme coolingBTo turn soil into seaCTo make air pressure zeroDTo turn fog into earthquake

Question 2ExpertLevel 90

If fog is greater at the foot of a hill and less at the summit what conclusion is appropriate?

AVapour is always higher at summitBCold moist air has accumulated in lower partCThere is no air at the footDThe hill destroys fog

Question 3ExpertLevel 90

Why does visibility fall sharply when droplet number increases in dense fog?

ADroplets lift soilBDroplets remove gravityCMore droplets scatter more lightDDroplets make air a vacuum

Question 4ExpertLevel 90

If lower air is cold but strong mixing continues why can mist remain weak?

AMixing prevents formation of a stable moist layerBMixing turns vapour into stoneCMixing blocks the SunDMixing always makes frost

Question 5ExpertLevel 90

If dew is on the surface but the air is clear what is the best conclusion?

ACondensation occurred on surface but suspended air droplets are not enoughBFog is definitely denseCThere is no water vapour in airDFrost has definitely formed

Question 6ExpertLevel 90

When can the chance of dew formation increase near an open water surface?

AWhen the water surface increases moisture in local airBWhen the water surface makes air completely dryCWhen temperature becomes infiniteDWhen surface becomes volcanic

Question 7ExpertLevel 90

If droplets are present in air but have not grown to raindrop size which form is more likely?

ADewBFrostCFog or mistDSnowfall

Question 8ExpertLevel 90

Why is moisture also considered along with minimum temperature in frost forecasting?

ABecause moisture always prevents frostBBecause temperature has no relationCBecause frost is unrelated to vapourDBecause water vapour is needed to form ice crystals

Question 9ExpertLevel 90

If moisture is high but the surface is very warm what will hinder dew formation?

AThe surface has not cooled to dew pointBThere is no water vapour in airCAir will always form frostDMoisture prevents condensation

Question 10ExpertLevel 90

If dense fog seems to sit low on a road what atmospheric condition can it indicate?

AVery warm upper air is the only reasonBCold moist and stable lower airCComplete absence of vapourDSurface becoming lava

Question 11ExpertLevel 90

Which group of clues is most useful for scientific identification of dew frost fog and mist?

ASoil colour river speed rock hardnessBSalinity tide earthquakeCLocation on surface or in air state of water and visibilityDSun distance moon size planet number

Question 12ExpertLevel 90

If dew on leaves and frost on metal occur on the same night what is the deeper explanation?

AVapour cannot reach metalBFrost never forms on leavesCDifferent surfaces cool at different rates and give different final statesDDew and frost are unrelated to temperature

Question 13ExpertLevel 90

What is the basic reason for considering both fog and mist as forms of condensation?

ABoth are dry airBBoth form by earthquakesCBoth are only rocksDWater vapour cools and changes into tiny droplets in air

Question 14ExpertLevel 90

Why is dew generally not considered as harmful to crops as frost?

ADew is liquid droplet while frost can damage tissues with ice crystalsBDew has no waterCFrost always warms plantsDDew cuts roots

Question 15ExpertLevel 90

If fog is dense only in an industrial area and lighter outside which local cause is possible?

AMore particles increased the number of condensation nucleiBIndustrial area has no airCPollution always removes moistureDFog is unrelated to industry

Question 16ExpertLevel 89

If the surface cools rapidly at night while the air above remains comparatively warmer, what mainly causes dew on the surface?

AAir in contact with the surface cooling to dew pointBUpper air suddenly becoming rainfallCSurface air pressure becoming zeroDImmediate increase of solar heat

Question 17ExpertLevel 89

Which condition indicates fog formation rather than frost formation?

AWhite ice crystals forming on the surfaceBTiny droplets remaining suspended in lower airCLiquid droplets settling on grassDAir becoming completely dry

Question 18ExpertLevel 89

If visibility is reduced but road signs can still be read from a moderate distance, which condensation form is most likely?

ADense fogBMistCFrostDDew

Question 19ExpertLevel 89

Why can fog droplets form more easily when dust or smoke is present?

AThese particles act as condensation nucleiBThese particles make air completely hotCThese particles destroy water vapourDThese particles stop gravity

Question 20ExpertLevel 89

What is the correct difference between dew and fog based on depth of saturation?

ADew has limited saturation near the surface, fog has a saturated lower-air layerBDew always falls from clouds, fog forms in soilCBoth are only ice crystalsDNeither requires moisture

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

Quiz this set

Why may a farmer consider irrigation or covering during a frost warning?

If fog is greater at the foot of a hill and less at the summit what conclusion is appropriate?

Why does visibility fall sharply when droplet number increases in dense fog?

If lower air is cold but strong mixing continues why can mist remain weak?

If dew is on the surface but the air is clear what is the best conclusion?

When can the chance of dew formation increase near an open water surface?

If droplets are present in air but have not grown to raindrop size which form is more likely?

Why is moisture also considered along with minimum temperature in frost forecasting?

If moisture is high but the surface is very warm what will hinder dew formation?

If dense fog seems to sit low on a road what atmospheric condition can it indicate?

Which group of clues is most useful for scientific identification of dew frost fog and mist?

If dew on leaves and frost on metal occur on the same night what is the deeper explanation?

What is the basic reason for considering both fog and mist as forms of condensation?

Why is dew generally not considered as harmful to crops as frost?

If fog is dense only in an industrial area and lighter outside which local cause is possible?

If the surface cools rapidly at night while the air above remains comparatively warmer, what mainly causes dew on the surface?

Which condition indicates fog formation rather than frost formation?

If visibility is reduced but road signs can still be read from a moderate distance, which condensation form is most likely?

Why can fog droplets form more easily when dust or smoke is present?

What is the correct difference between dew and fog based on depth of saturation?

Quiz result

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

Quiz this set

Why may a farmer consider irrigation or covering during a frost warning?

If fog is greater at the foot of a hill and less at the summit what conclusion is appropriate?

Why does visibility fall sharply when droplet number increases in dense fog?

If lower air is cold but strong mixing continues why can mist remain weak?

If dew is on the surface but the air is clear what is the best conclusion?

When can the chance of dew formation increase near an open water surface?

If droplets are present in air but have not grown to raindrop size which form is more likely?

Why is moisture also considered along with minimum temperature in frost forecasting?

If moisture is high but the surface is very warm what will hinder dew formation?

If dense fog seems to sit low on a road what atmospheric condition can it indicate?

Which group of clues is most useful for scientific identification of dew frost fog and mist?

If dew on leaves and frost on metal occur on the same night what is the deeper explanation?

What is the basic reason for considering both fog and mist as forms of condensation?

Why is dew generally not considered as harmful to crops as frost?

If fog is dense only in an industrial area and lighter outside which local cause is possible?

If the surface cools rapidly at night while the air above remains comparatively warmer, what mainly causes dew on the surface?

Which condition indicates fog formation rather than frost formation?

If visibility is reduced but road signs can still be read from a moderate distance, which condensation form is most likely?

Why can fog droplets form more easily when dust or smoke is present?

What is the correct difference between dew and fog based on depth of saturation?

Quiz result

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