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

Question 1MediumLevel 90

If there is dew in a field in the morning but visibility is normal, which conclusion is correct?

ACondensation occurred on surfaces, not as dense fog in airBThere was no water vapour in airCDew and fog are always the same eventDFrost has definitely formed

Question 2MediumLevel 90

White frost after a clear calm winter night is the result of which combined condition?

AStrong hot wind and low moistureBCloudy warm night and dry surfaceCStrong surface cooling, enough moisture, and below-freezing temperatureDOnly dust and air without water vapour

Question 3HardLevel 88

If on a clear night grass temperature falls below dew point but remains above freezing point which form is most appropriate?

AFrost because surface is coldBDew because condensation will occur as liquid dropletsCFog because droplets form only in airDSnowfall because ice falls from clouds

Question 4HardLevel 88

If surface temperature is below freezing and water vapour directly deposits as ice crystals what will be the result?

ADewBMistCFrostDLiquid rain

Question 5HardLevel 88

Why is it most correct to call fog a cloud near the ground?

ABecause it is made of suspended tiny droplets in air near the groundBBecause it is only a group of dry dustCBecause it forms below sea levelDBecause it is vapour-free air

Question 6HardLevel 88

Which statement correctly explains the visibility-based difference between mist and fog?

AVisibility is lower in mist than in fogBFog reduces visibility more than mistCVisibility is always same in bothDMist has no water droplets

Question 7HardLevel 88

What is the main reason for less dew formation on a cloudy night?

AClouds reduce radiational heat loss from the surfaceBClouds destroy water vapourCClouds always keep surface below freezingDClouds remove condensation nuclei

Question 8HardLevel 88

How can strong wind affect dew formation?

AIt prevents a stable cool moist layer near the surfaceBIt turns all vapour into frostCIt always keeps surface below dew pointDIt changes clouds into ground

Question 9HardLevel 88

What may cause fog to persist more in a valley during morning?

ARising of hot dry airBAccumulation of cold moist air in the valleyCAbsence of water vapour in valleyDMelting of valley rocks

Question 10HardLevel 88

If warm moist air flows over a cold land surface which type of fog may form?

AFog formed by contact coolingBDesert dust fogCVolcanic fogDGlacial lava fog

Question 11HardLevel 88

Why can fog form when relatively warm moist air moves over cold water?

AAir warming and dryingBAir cooling by contact and condensingCWater turning into saltDComplete absence of water vapour

Question 12HardLevel 88

Why can steam-like mist appear when cold air moves over a warm lake?

AWarm water supplies moisture and cold air saturates quicklyBCold air has infinite vapour capacityCLake changes vapour into soilDMist forms only from dust

Question 13HardLevel 88

How can urban pollution particles help make fog denser?

AThey provide condensation nuclei for water vapourBThey remove water vapour from airCThey turn fog into frostDThey always increase visibility

Question 14HardLevel 88

Why can fog remain for longer during a temperature inversion?

ACold moist air is trapped below and mixing decreasesBWarm air falls rapidly belowCWater vapour becomes stoneDUpper air pulls away all droplets

Question 15HardLevel 88

If field leaves have white crystals instead of liquid droplets what is the correct identification?

ADewBFrostCMistDFog

Question 16HardLevel 88

What mainly decides whether dew or frost forms?

ARelation of surface temperature with freezing pointBSpeed of river flowCHeight of sea wavesDColour of rock

Question 17HardLevel 88

What is the main process-related difference between fog and rainfall?

AFog droplets remain suspended while raindrops fallBFog has no waterCRainfall is unrelated to water vapourDFog is always solid

Question 18HardLevel 88

What is the physical explanation for low visibility in dense fog?

AScattering of light by tiny dropletsBAir weight becoming zeroCSunlight stopping completelyDWater vapour becoming black

Question 19HardLevel 88

If both fog and mist form from tiny droplets why are they differentiated?

ABecause their visibility effect differsBBecause mist has no waterCBecause fog is always iceDBecause they form on different planets

Question 20HardLevel 88

Why can frost form more easily in an open field?

AOpen surface can undergo greater radiational cooling at nightBOpen field is always seaCOpen field has no water vapourDOpen surface stops the Sun

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

Quiz this set

If there is dew in a field in the morning but visibility is normal, which conclusion is correct?

White frost after a clear calm winter night is the result of which combined condition?

If on a clear night grass temperature falls below dew point but remains above freezing point which form is most appropriate?

If surface temperature is below freezing and water vapour directly deposits as ice crystals what will be the result?

Why is it most correct to call fog a cloud near the ground?

Which statement correctly explains the visibility-based difference between mist and fog?

What is the main reason for less dew formation on a cloudy night?

How can strong wind affect dew formation?

What may cause fog to persist more in a valley during morning?

If warm moist air flows over a cold land surface which type of fog may form?

Why can fog form when relatively warm moist air moves over cold water?

Why can steam-like mist appear when cold air moves over a warm lake?

How can urban pollution particles help make fog denser?

Why can fog remain for longer during a temperature inversion?

If field leaves have white crystals instead of liquid droplets what is the correct identification?

What mainly decides whether dew or frost forms?

What is the main process-related difference between fog and rainfall?

What is the physical explanation for low visibility in dense fog?

If both fog and mist form from tiny droplets why are they differentiated?

Why can frost form more easily in an open field?

Quiz result

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

Quiz this set

If there is dew in a field in the morning but visibility is normal, which conclusion is correct?

White frost after a clear calm winter night is the result of which combined condition?

If on a clear night grass temperature falls below dew point but remains above freezing point which form is most appropriate?

If surface temperature is below freezing and water vapour directly deposits as ice crystals what will be the result?

Why is it most correct to call fog a cloud near the ground?

Which statement correctly explains the visibility-based difference between mist and fog?

What is the main reason for less dew formation on a cloudy night?

How can strong wind affect dew formation?

What may cause fog to persist more in a valley during morning?

If warm moist air flows over a cold land surface which type of fog may form?

Why can fog form when relatively warm moist air moves over cold water?

Why can steam-like mist appear when cold air moves over a warm lake?

How can urban pollution particles help make fog denser?

Why can fog remain for longer during a temperature inversion?

If field leaves have white crystals instead of liquid droplets what is the correct identification?

What mainly decides whether dew or frost forms?

What is the main process-related difference between fog and rainfall?

What is the physical explanation for low visibility in dense fog?

If both fog and mist form from tiny droplets why are they differentiated?

Why can frost form more easily in an open field?

Quiz result

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