What is the simplest reason for high moisture in sea air?
Correct answer: A
The sea is a vast water source so water vapour continuously enters the atmosphere from it. This is why coastal regions have higher humidity.
View question detailsGeography
Humidity, evaporation, and condensation
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Medium · Level 87 · geography,sea_air,humidity
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- Continuous evaporation from the sea
- No evaporation from the sea
- Sea water always being solid
- Absence of air above sea
Medium · Level 87 · geography,desert,evaporation
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- More clouds and more rainfall
- High temperature and low humidity
- Low solar heat and saturated air
- Excess water vapour in air
Medium · Level 87 · geography,condensation,visible_droplets
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- Evaporation
- Runoff
- Condensation
- Flow
Medium · Level 87 · geography,relative_humidity,evening
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- Falling temperature reduces air capacity
- Day temperature always rises
- Moisture completely disappears from air
- Ground dries instantly
Medium · Level 87 · geography,water_vapour,cloud_formation
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- Colour of rocks
- Cloud formation
- Rotation speed of Earth
- Magnetic field
Medium · Level 87 · geography,water_vapour,weather
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- Because it only forms rocks
- Because it changes Earth's shape
- Because it is linked with clouds rainfall and heat balance
- Because it stops the sea
Medium · Level 87 · geography,wet_bulb,psychrometer
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- Because evaporation on wet bulb takes heat
- Because dry bulb is covered with ice
- Because wet bulb blocks the Sun
- Because air has no moisture
Medium · Level 87 · geography,saturated_air,condensation
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- Soil erosion
- Condensation
- Earthquake
- Magnetism
Medium · Level 87 · geography,condensation,cold_surface
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- Dust blowing in an open field
- Cracks in dry soil
- Droplets forming outside a cold glass
- Sand becoming hot
Medium · Level 87 · geography,sweat,evaporation
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- Slow
- Stopped
- Impossible
- Fast
Medium · Level 87 · geography,afternoon,relative_humidity
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- Rising temperature increases air capacity
- Oxygen is removed from air
- Water vapour always freezes
- Air pressure becomes zero
Medium · Level 87 · geography,fog,visibility
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- It makes roads longer
- It reduces visibility
- It makes vehicles lighter
- It stops gravity
Medium · Level 87 · geography,mountain_clouds,orographic_lift
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- Freezing of sea
- Air descending and warming
- Moist air rising and cooling
- Complete drying of ground
Medium · Level 87 · geography,latent_heat,evaporation_condensation
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- Heat is always destroyed in both
- Heat is released in evaporation and absorbed in condensation
- Heat has no relation in both
- Heat is absorbed in evaporation and released in condensation
Medium · Level 87 · geography,dry_air,warm_air
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- Warm and dry air
- Cold saturated air
- Very humid and cold air
- Air at dew point
Medium · Level 87 · geography,cooling,relative_humidity
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- Relative humidity will decrease
- Relative humidity will increase
- Moisture in air will become zero
- Evaporation will necessarily increase
Medium · Level 87 · geography,water_cycle,evaporation
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- Condensation
- Precipitation
- Evaporation
- Leaching
Medium · Level 87 · geography,frost,crops
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- Warm humid morning
- Surface cooling below freezing
- Hot wind blowing
- Continuous sunshine
Medium · Level 87 · geography,humidity,evaporation,air circulation,atmospheric moisture
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- Air circulation is lower in a closed room
- Water vapour immediately condenses into liquid water in a closed room
- Evaporation from clothes does not occur in an open field
- The freezing point of water becomes higher in a closed room
Medium · Level 87 · geography,wind_speed,evaporation
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- It removes moist air above the surface
- It turns water into stone
- It blocks solar energy
- It destroys water vapour
What is the main reason water dries quickly in deserts during summer?
Correct answer: B
High temperature gives energy to water and low humidity lets air take more vapour. Therefore evaporation is faster.
View question detailsIn which process does invisible water vapour change into visible droplets?
Correct answer: C
Water vapour is invisible in gaseous form and changes into droplets during condensation. Clouds and fog are examples of this.
View question detailsWhy can relative humidity increase during evening?
Correct answer: A
In the evening falling temperature reduces the water vapour holding capacity of air. With the same moisture relative humidity increases.
View question detailsIf there were no water vapour in the atmosphere which process would be directly affected?
Correct answer: B
Clouds form from droplets and ice particles produced by condensation of water vapour. Without water vapour cloud formation would not be possible.
View question detailsWhy does the amount of water vapour affect weather?
Correct answer: C
Water vapour is related to clouds rainfall and latent heat. Therefore it plays an important role in weather conditions.
View question detailsWhy can wet bulb temperature be lower than dry bulb temperature?
Correct answer: A
Evaporation of water from the wet bulb absorbs heat so its temperature can be lower. Humidity is found from this temperature difference.
View question detailsWhat becomes more likely if more water vapour is added to saturated air?
Correct answer: B
Saturated air already holds maximum water vapour. Extra moisture or cooling can begin condensation.
View question detailsIn which example is condensation clearly visible?
Correct answer: C
A cold glass cools nearby air and water vapour changes into droplets. This is a daily example of condensation.
View question detailsIf the air is very dry how will sweat evaporation be?
Correct answer: D
Dry air has less water vapour so it takes more vapour from sweat. This makes evaporation faster and cooling stronger.
View question detailsWhat is the common reason for relative humidity decreasing in the afternoon?
Correct answer: A
In the afternoon higher temperature allows air to hold more vapour. If moisture stays the same relative humidity decreases.
View question detailsWhy does fog affect road transport?
Correct answer: B
In fog tiny droplets obstruct the path of light and reduce visibility. Visibility is a key safety factor in transport.
View question detailsWhat is one major reason for cloud formation in mountain regions?
Correct answer: C
Moist air rises along mountains and cools. On reaching dew point condensation forms clouds.
View question detailsWhich statement about heat in evaporation and condensation is correct?
Correct answer: D
Evaporation needs latent heat and condensation releases latent heat. This is important for understanding weather energy.
View question detailsWhich type of air is more capable of taking more water vapour?
Correct answer: A
Warm air has higher capacity and dry air lacks moisture. Therefore it can take more water vapour.
View question detailsIf the actual amount of water vapour does not change but air cools what result is possible?
Correct answer: B
Cool air has lower water vapour holding capacity. Therefore with the same vapour relative humidity increases.
View question detailsThrough which process does water reach the atmosphere from Earth's surface?
Correct answer: C
Evaporation changes surface water into vapour and sends it to the atmosphere. It is a main stage of the water cycle.
View question detailsIn which condition can frost damage crops in fields?
Correct answer: B
Below freezing water vapour turns into ice crystals on the surface and can harm crop cells. Remember the temperature difference between frost and dew.
View question detailsWhy may wet clothes dry more slowly in a closed room than in an open field?
Correct answer: A
In a closed room, limited air circulation allows the air around the clothes to become humid quickly. Humid air can take up less additional water vapour, so the rate of evaporation decreases. In an open field, moving air removes the moist air and brings relatively drier air, helping clothes dry faster. Exam tip: wind increases the rate of evaporation.
View question detailsHow does wind speed increase evaporation?
Correct answer: A
Strong wind removes the moist layer near the surface. Then new drier air takes vapour from water.
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