Geography

Heating and cooling of the atmosphere

Q: Why do clouds reduce surface heating during the day?

They reflect part of solar radiation Clouds return part of solar energy, so the surface heats less. Exam tip: understand clouds as a daytime cooling factor.

Q: Why can clouds keep temperature relatively higher at night?

They trap part of longwave radiation Clouds trap terrestrial radiation and reduce heat loss. Exam tip: remember that the night effect of clouds differs from the day effect.

Q: Why does evaporation cool a surface?

Because latent heat is used During evaporation water takes heat to become vapour. Exam tip: cooling by drying sweat is a simple example.

Q: Which heat is released in the atmosphere during condensation?

Latent heat Latent heat is released when water vapour changes into water droplets. Exam tip: remember heat release during cloud formation.

Q: How is the heat capacity of water compared with land?

Higher Water can store more heat, so its temperature changes slowly. Exam tip: connect marine influence with this property.

Q: Why does land heat faster than water?

Land has lower heat capacity Due to lower heat capacity, land temperature rises quickly. Exam tip: explain land-water contrast through heat capacity.

Q: Why is temperature range usually smaller in coastal areas?

Because the sea moderates temperature The sea heats and cools slowly, keeping temperature moderate. Exam tip: connect coastal climate with moderating influence.

Q: What generally happens to temperature with increasing height in the atmosphere?

Decreases The atmosphere is heated from below, so temperature generally decreases with height. Exam tip: link it with normal lapse rate.

Q: What may happen opposite to the normal condition in temperature inversion?

Temperature increases with height In inversion cold air may stay below and warm air above. Exam tip: understand it as the reverse of normal lapse rate.

Q: Why is heat loss greater on a clear-sky night?

Because longwave radiation escapes easily Under clear sky, surface heat escapes more toward space. Exam tip: connect clear night with strong cooling.

In this Class 11 Geography topic, students learn how the atmosphere is heated and cooled through incoming solar radiation and outgoing terrestrial radiation. The lesson explains Earth’s heat balance and the roles of conduction, convection, advection, and latent heat in transferring energy through the atmosphere. Students also examine how land and water surfaces, cloud cover, humidity, and atmospheric circulation influence temperature patterns and help produce differences between places and times.

Easy · Level 4 · 25 questions

Practice questions

01Why do clouds reduce surface heating during the day?

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Answer and explanation

Correct answer: B. They reflect part of solar radiation

Clouds return part of solar energy, so the surface heats less. Exam tip: understand clouds as a daytime cooling factor.

Heating and cooling of the atmosphere

Practice questions

01Why do clouds reduce surface heating during the day?दिन में बादल धरातल को कम गर्म क्यों करते हैं?

02Why can clouds keep temperature relatively higher at night?रात में बादल तापमान को अपेक्षाकृत अधिक क्यों रख सकते हैं?

03Why does evaporation cool a surface?वाष्पीकरण सतह को ठंडा क्यों करता है?

04Which heat is released in the atmosphere during condensation?संघनन के समय वायुमंडल में कौन सी ऊष्मा मुक्त होती है?

05How is the heat capacity of water compared with land?जल की ऊष्मा धारिता स्थल की तुलना में कैसी होती है?

06Why does land heat faster than water?स्थल जल की तुलना में जल्दी क्यों गर्म होता है?

07Why is temperature range usually smaller in coastal areas?समुद्री तटीय क्षेत्रों में तापांतर सामान्यतः कम क्यों होता है?

08What generally happens to temperature with increasing height in the atmosphere?वायुमंडल में ऊंचाई बढ़ने पर सामान्यतः तापमान कैसा होता है?

09What may happen opposite to the normal condition in temperature inversion?तापमान प्रतिलोमन में सामान्य स्थिति के विपरीत क्या हो सकता है?

10Why is heat loss greater on a clear-sky night?साफ आकाश वाली रात में ताप हानि अधिक क्यों होती है?

11Which condition helps in frost formation?पाला बनने की स्थिति में कौन सा कारक सहायक होता है?

12Why does the daily maximum temperature not always occur exactly at noon?दिन का अधिकतम तापमान ठीक दोपहर पर ही हमेशा क्यों नहीं आता?

13When is the minimum temperature usually recorded?न्यूनतम तापमान प्रायः कब दर्ज होता है?

14How do greenhouse gases help keep the atmosphere warm?हरितगृह गैसें वायुमंडल को गर्म रखने में कैसे मदद करती हैं?

15Carbon dioxide is useful in absorbing which radiation?कार्बन डाइऑक्साइड किस विकिरण को सोखने में उपयोगी है?

16Why can water vapour make nights relatively warmer?जलवाष्प रातों को अपेक्षाकृत गर्म क्यों बना सकता है?

17Why can deserts have a large difference between day and night temperature?मरुस्थल में दिन और रात के ताप में बड़ा अंतर क्यों हो सकता है?

18Why can a black surface become warmer than a white surface?काली सतह सफेद सतह की तुलना में अधिक गर्म क्यों हो सकती है?

19How is the albedo of a snowy surface?बर्फीली सतह का अल्बीडो कैसा होता है?

20Which surface is likely to show more temperature rise during the day?किस सतह पर दिन में अधिक ताप वृद्धि की संभावना होती है?

21Horizontal transfer of heat in the atmosphere occurs by what?वायुमंडल में ताप का क्षैतिज स्थानांतरण किससे होता है?

22The cooling effect of sea breeze is related to which process?समुद्री हवा का ठंडा प्रभाव किस प्रक्रिया से जुड़ा है?

23Why does warm air rise?गर्म हवा ऊपर क्यों उठती है?

24Why does cold air generally sink?ठंडी हवा सामान्यतः नीचे क्यों बैठती है?

25Why does rising air become cooler?ऊपर उठती हवा ठंडी क्यों हो जाती है?

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01Why do clouds reduce surface heating during the day?

02Why can clouds keep temperature relatively higher at night?

03Why does evaporation cool a surface?

04Which heat is released in the atmosphere during condensation?

05How is the heat capacity of water compared with land?

06Why does land heat faster than water?

07Why is temperature range usually smaller in coastal areas?

08What generally happens to temperature with increasing height in the atmosphere?

09What may happen opposite to the normal condition in temperature inversion?

10Why is heat loss greater on a clear-sky night?

11Which condition helps in frost formation?

12Why does the daily maximum temperature not always occur exactly at noon?

13When is the minimum temperature usually recorded?

14How do greenhouse gases help keep the atmosphere warm?

15Carbon dioxide is useful in absorbing which radiation?

16Why can water vapour make nights relatively warmer?

17Why can deserts have a large difference between day and night temperature?

18Why can a black surface become warmer than a white surface?

19How is the albedo of a snowy surface?

20Which surface is likely to show more temperature rise during the day?

21Horizontal transfer of heat in the atmosphere occurs by what?

22The cooling effect of sea breeze is related to which process?

23Why does warm air rise?

24Why does cold air generally sink?

25Why does rising air become cooler?