Humidity, evaporation, and condensation

Question 1ExpertLevel 86

When can surface temperature be more important than air temperature in dew formation on grass?

AWhen grass surface cools by radiation to dew pointBWhen air is completely dryCWhen the Sun is strongest at noonDWhen relative humidity is very low

Question 2ExpertLevel 86

Why is a larger open water surface area important for evaporation?

AMore molecules get contact with air and chance to escapeBWater surface area has no effectCLarger area makes water solidDLarger area reduces oxygen in air

Question 3ExpertLevel 86

If morning air is cool and humid but afternoon air feels warm and dry, what may be the main reason?

ATemperature rise lowers relative humidityBVapour necessarily became zeroCAtmosphere disappearedDCondensation nuclei do not exist at noon

Question 4ExpertLevel 86

What is the scientific explanation for air feeling sticky before rain?

AAir near saturation slows evaporation of sweatBAir has no water vapourCSweat becomes solidDAir pressure always becomes zero

Question 5ExpertLevel 86

Why does condensation release heat while evaporation absorbs heat?

AThey are opposite phase changesBBoth take energy in same directionCEnergy has no role in condensationDEvaporation happens only at night

Question 6ExpertLevel 86

If relative humidity is low, why is soil kept in sunlight more likely to dry quickly?

ADry air can accept more vapour from soilBEvaporation is impossible in dry airCSunlight increases condensationDSoil cannot contain water

Question 7ExpertLevel 86

Why is it wrong to treat relative humidity as only the actual amount of water vapour?

ABecause it is a ratio of actual amount to saturation capacityBBecause it is only rainfall heightCBecause it is wind directionDBecause it is soil moisture

Question 8ExpertLevel 86

Why does the chance of cloud formation increase when moist air rises?

ARising air can cool and reach dew pointBRising air always becomes dryCVapour is destroyed in rising airDTemperature of rising air necessarily increases

Question 9ExpertLevel 86

What condition allows warm moist air over a cold surface to first condense and then form visible droplets?

AAir near the surface cooling to dew pointBAir becoming completely dryCVapour becoming nitrogenDSurface becoming extremely hot

Question 10ExpertLevel 86

Which is the most correct conclusion for understanding humidity, evaporation and condensation together?

AHumidity shows moisture in air and thermal conditions decide evaporation or condensationBHumidity and temperature have no relationCEvaporation and condensation are same-direction processesDCondensation occurs only in absence of water

Question 11ExpertLevel 86

If air shows a very small difference between dry-bulb and wet-bulb temperatures, what can be concluded about humidity?

AThe air is very dryBEvaporation is high and humidity is lowCThe air is close to saturationDThere is no water vapour in air

Question 12ExpertLevel 86

When wet-bulb depression is large, what is the correct conclusion about evaporation and humidity?

AAir is very close to saturationBEvaporation has almost stoppedCRelative humidity is very highDEvaporation is high and relative humidity is low

Question 13ExpertLevel 87

Why can two unsaturated air masses sometimes form fog after mixing?

ABecause the mixed air temperature and moisture balance can reach saturationBBecause unsaturated air has no water vapourCBecause mixing always makes air pressure zeroDBecause fog forms only without moisture

Question 14ExpertLevel 87

If rising air becomes saturated, why does further cooling become slower than the dry rate?

ABecause latent heat released by condensation partly offsets coolingBBecause saturated air has no pressureCBecause water vapour is instantly destroyedDBecause rising completely stops

Question 15ExpertLevel 87

Why can dew point be a better indicator of mugginess than (RH) in meteorology?

ABecause dew point is more directly linked with actual vapour amountBBecause dew point only tells wind directionCBecause (RH) is always the actual vapour massDBecause mugginess has no relation with vapour

Question 16ExpertLevel 87

If energy is limited in evaporation, why can the rate remain limited even with a large humidity deficit?

ABecause water molecules need latent heat to become vapourBBecause dry air does not accept vapourCBecause humidity deficit removes pressureDBecause evaporation needs no water

Question 17ExpertLevel 87

How can increasing water vapour in air affect cloud formation height?

ACloud base may become lower because less cooling is needed for saturationBCloud base always moves to spaceCClouds never formDMore dryness is needed for saturation

Question 18ExpertLevel 87

If cold air collects in a valley at night and moisture is sufficient, what is most likely to form?

AValley fogBHeat waveCSea stormDDust devil

Question 19ExpertLevel 87

Why can evaporation from saline water be slightly lower than from pure water?

ABecause dissolved salts reduce the vapour pressure of waterBBecause saline water has no (H_2O)CBecause salt completely stops airDBecause saline water is always ice

Question 20ExpertLevel 87

Why can droplets remain very small even when condensation nuclei are abundant?

ABecause available vapour is divided among many particlesBBecause more particles make condensation impossibleCBecause vapour has no massDBecause droplets form only on rocks

Humidity, evaporation, and condensation

Quiz this set

When can surface temperature be more important than air temperature in dew formation on grass?

Why is a larger open water surface area important for evaporation?

If morning air is cool and humid but afternoon air feels warm and dry, what may be the main reason?

What is the scientific explanation for air feeling sticky before rain?

Why does condensation release heat while evaporation absorbs heat?

If relative humidity is low, why is soil kept in sunlight more likely to dry quickly?

Why is it wrong to treat relative humidity as only the actual amount of water vapour?

Why does the chance of cloud formation increase when moist air rises?

What condition allows warm moist air over a cold surface to first condense and then form visible droplets?

Which is the most correct conclusion for understanding humidity, evaporation and condensation together?

If air shows a very small difference between dry-bulb and wet-bulb temperatures, what can be concluded about humidity?

When wet-bulb depression is large, what is the correct conclusion about evaporation and humidity?

Why can two unsaturated air masses sometimes form fog after mixing?

If rising air becomes saturated, why does further cooling become slower than the dry rate?

Why can dew point be a better indicator of mugginess than (RH) in meteorology?

If energy is limited in evaporation, why can the rate remain limited even with a large humidity deficit?

How can increasing water vapour in air affect cloud formation height?

If cold air collects in a valley at night and moisture is sufficient, what is most likely to form?

Why can evaporation from saline water be slightly lower than from pure water?

Why can droplets remain very small even when condensation nuclei are abundant?

Quiz result

Humidity, evaporation, and condensation

Quiz this set

When can surface temperature be more important than air temperature in dew formation on grass?

Why is a larger open water surface area important for evaporation?

If morning air is cool and humid but afternoon air feels warm and dry, what may be the main reason?

What is the scientific explanation for air feeling sticky before rain?

Why does condensation release heat while evaporation absorbs heat?

If relative humidity is low, why is soil kept in sunlight more likely to dry quickly?

Why is it wrong to treat relative humidity as only the actual amount of water vapour?

Why does the chance of cloud formation increase when moist air rises?

What condition allows warm moist air over a cold surface to first condense and then form visible droplets?

Which is the most correct conclusion for understanding humidity, evaporation and condensation together?

If air shows a very small difference between dry-bulb and wet-bulb temperatures, what can be concluded about humidity?

When wet-bulb depression is large, what is the correct conclusion about evaporation and humidity?

Why can two unsaturated air masses sometimes form fog after mixing?

If rising air becomes saturated, why does further cooling become slower than the dry rate?

Why can dew point be a better indicator of mugginess than (RH) in meteorology?

If energy is limited in evaporation, why can the rate remain limited even with a large humidity deficit?

How can increasing water vapour in air affect cloud formation height?

If cold air collects in a valley at night and moisture is sufficient, what is most likely to form?

Why can evaporation from saline water be slightly lower than from pure water?

Why can droplets remain very small even when condensation nuclei are abundant?

Quiz result

Analytics choices