These Water in the Atmosphere Important Questions cover important NCERT concepts related to humidity, evaporation, condensation, cloud formation, precipitation and atmospheric moisture.
The chapter-wise questions include MCQs, one-word questions, assertion and reason questions and analytical descriptive questions useful for UPSC, SSC, Railways, State PSC, CUET, CBSE board exams and competitive examinations.
NCERT Page Coverage: Page 84–89
These MCQs from Water in the Atmosphere help students revise important concepts related to humidity, clouds, condensation and precipitation processes.
The main source of atmospheric moisture is:
Page Reference: Page 84
The process through which water changes into vapour is called:
Page Reference: Page 84
Evaporation increases with:
Page Reference: Page 84
The amount of water vapour present in air is called:
Page Reference: Page 85
Humidity expressed as percentage is called:
Page Reference: Page 85
Air becomes saturated when:
Page Reference: Page 85
The temperature at which air becomes saturated is called:
Page Reference: Page 85
Condensation occurs when:
Page Reference: Page 86
Tiny drops of water suspended in air near ground form:
Page Reference: Page 86
Clouds are formed mainly due to:
Page Reference: Page 87
Which clouds appear as high thin white sheets?
Page Reference: Page 87
Dark rain-bearing clouds are generally called:
Page Reference: Page 87
Heap-like clouds with flat bases are called:
Page Reference: Page 87
Continuous layered clouds are called:
Page Reference: Page 87
Rainfall caused by surface heating is called:
Page Reference: Page 88
Rainfall occurring due to mountains obstructing winds is called:
Page Reference: Page 88
The leeward side of mountains generally experiences:
Page Reference: Page 88
Rainfall caused by meeting of warm and cold air masses is called:
Page Reference: Page 89
Snowfall occurs when:
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Hailstones are formed mainly in:
Page Reference: Page 89
| Question | Answer | Page Reference |
|---|---|---|
| What is atmospheric moisture called? | Humidity | Page 85 |
| Which process converts water into vapour? | Evaporation | Page 84 |
| Which process converts vapour into liquid water? | Condensation | Page 86 |
| What is temperature of saturation called? | Dew point | Page 85 |
| What are ground-level clouds called? | Fog | Page 86 |
| Which clouds are thin and feathery? | Cirrus clouds | Page 87 |
| Which clouds are rain-bearing? | Nimbus clouds | Page 87 |
| Which clouds are heap-like? | Cumulus clouds | Page 87 |
| Which clouds occur in layers? | Stratus clouds | Page 87 |
| Which rainfall occurs due to convection currents? | Convectional rainfall | Page 88 |
| Which rainfall occurs due to mountains? | Orographic rainfall | Page 88 |
| Which side of mountain receives less rainfall? | Leeward side | Page 88 |
| Which rainfall occurs due to fronts? | Cyclonic rainfall | Page 89 |
| Which instrument measures rainfall? | Rain gauge | Page 89 |
| Which precipitation form consists of ice pellets? | Hail | Page 89 |
| Which process changes ice directly into vapour? | Sublimation | Page 84 |
| Which humidity is expressed in percentage? | Relative humidity | Page 85 |
| Which atmospheric layer contains clouds? | Troposphere | Page 87 |
| Which side of mountain receives maximum rainfall? | Windward side | Page 88 |
| What is released during condensation? | Latent heat | Page 86 |
Assertion (A): Evaporation increases with rise in temperature.
Reason (R): Higher temperature provides more energy to water molecules.
Options:
Page Reference: Page 84
Assertion (A): Warm air can hold more moisture than cold air.
Reason (R): Capacity of air to retain water vapour increases with temperature.
Options:
Page Reference: Page 85
Assertion (A): Condensation occurs after air cools below dew point.
Reason (R): Saturated air cannot hold excess water vapour.
Options:
Page Reference: Page 86
Assertion (A): Fog is a ground-level cloud.
Reason (R): Water vapour condenses near Earth’s surface under suitable conditions.
Options:
Page Reference: Page 86
Assertion (A): Cirrus clouds generally indicate fair weather.
Reason (R): Cirrus clouds are high thin clouds made of ice crystals.
Options:
Page Reference: Page 87
Assertion (A): Orographic rainfall occurs on windward mountain slopes.
Reason (R): Moist air rises, cools and condenses when obstructed by mountains.
Options:
Page Reference: Page 88
Assertion (A): Leeward side of mountains receives less rainfall.
Reason (R): Descending air becomes warmer and drier on leeward side.
Options:
Page Reference: Page 88
Assertion (A): Convectional rainfall is common in equatorial regions.
Reason (R): Strong heating causes rapid upward movement of moist air.
Options:
Page Reference: Page 88
Assertion (A): Cyclonic rainfall occurs due to meeting of warm and cold air masses.
Reason (R): Warm air rises above cold air causing condensation.
Options:
Page Reference: Page 89
Assertion (A): Relative humidity changes with temperature.
Reason (R): Warm air has greater moisture-holding capacity.
Options:
Page Reference: Page 85
Explain the importance of atmospheric moisture.
Page Reference: Page 84
Discuss the process and factors affecting evaporation.
Page Reference: Page 84
Explain the concept and types of humidity.
Page Reference: Page 85
Differentiate between absolute humidity and relative humidity.
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Explain the meaning and significance of dew point.
Page Reference: Page 85
Discuss the conditions necessary for condensation.
Page Reference: Page 86
Explain the formation of fog and mist.
Page Reference: Page 86
Describe the different types of clouds.
Page Reference: Page 87
Differentiate between cirrus, cumulus, stratus and nimbus clouds.
Page Reference: Page 87
Explain the process of cloud formation.
Page Reference: Page 87
Discuss the different forms of precipitation.
Page Reference: Page 89
Explain the mechanism of convectional rainfall.
Page Reference: Page 88
Describe the process of orographic rainfall with suitable diagram explanation.
Page Reference: Page 88
Explain why rain shadow regions develop on leeward slopes.
Page Reference: Page 88
Discuss the mechanism of cyclonic rainfall.
Page Reference: Page 89