Geography

Distribution of temperature and inversion of temperature

Q: If a mountain town is cooler than a plain town at the same latitude which analysis is most correct?

Lapse effect due to altitude is effective At the same latitude altitude can reduce temperature. In exams treat altitude as a key clue when latitude is same.

Q: If isotherms form a closed warm centre over an inland desert area what does it indicate?

Local high thermal centre Closed warm isotherms can show a local thermal anomaly. In exams read closed patterns as heat centres.

Q: If fog is trapped near the surface in a valley morning while sky above looks clear which conclusion is more suitable?

Low level temperature inversion exists Inversion can trap moisture and fog near the surface. In exams link valley fog with a stable lower layer.

Q: If a black rocky surface becomes very hot by day and nearby vegetated surface is less hot what is the main reason?

Difference in low albedo and transpiration Dark surface absorbs more energy and vegetation cools through transpiration. In exams check surface properties together.

Q: If a coastal area has a cold current but a hot dry wind comes from land during day how should temperature be evaluated?

Both opposite effects must be analyzed together Cold current cools but hot land wind can raise temperature. In exams balance opposing factors.

Q: If pollution is high in the morning after clear winter nights in an area which process has the largest role?

Radiation temperature inversion A clear winter night cools the surface and forms a stable lower layer. Link winter morning pollution with inversion in exams.

Q: If two coastal places are affected by warm and cold currents respectively what will cause difference in isotherms?

Thermal effect of ocean currents Direct answer: Option D, the thermal effect of ocean currents. Isotherms are lines joining places with equal temperature. Ocean currents transport warm or cold water and transfer heat to or from the air over nearby coastal areas. A warm current can make a coast warmer than places at the same latitude, while a cold current can make it cooler. This changes the expected temperature pattern and may bend or shift isotherms near the coast. Option D identifies the physical cause. Option A, language difference, has no direct effect on temperature distribution. Option B, river names, are labels and cannot explain thermal patterns. Option C, population difference, may influence local urban heat in limited areas, but it is not the main reason for the contrast between warm- and cold-current coasts. Exam cue: when coastal temperature differs unusually from latitude, check ocean currents.

Q: If temperature should decrease by normal lapse but the lower layer is colder than the layer above what is the conclusion?

A local temperature inversion has formed Cold lower layer and warmer upper layer identify inversion. In exams read vertical temperature order by layers.

Q: If an inland continental area is very hot in July and very cold in January which factor explains it?

Continentality Land heats and cools quickly so annual range is large. In exams link inland areas with continentality.

Q: If cold closed lines appear over a mountain region on an isotherm map what is the most likely reason?

Temperature decrease due to altitude Mountain altitude can lower temperature and form a cold centre. Link closed cold lines with altitude in exams.

This Class 11 Geography topic explains how temperature varies across the Earth’s surface and through the atmosphere as part of solar radiation, heat balance, and temperature studies. Students learn about horizontal and vertical temperature distribution, the normal decrease of temperature with altitude, and the factors that influence it, including latitude, land and water, ocean currents, winds, and relief. The topic also examines temperature inversion, its causes, types, and effects on air movement, fog, pollution, and local weather conditions.

Hard · Level 3 · 25 questions

Practice questions

01If a mountain town is cooler than a plain town at the same latitude which analysis is most correct?

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Answer and explanation

Correct answer: B. Lapse effect due to altitude is effective

At the same latitude altitude can reduce temperature. In exams treat altitude as a key clue when latitude is same.

Distribution of temperature and inversion of temperature

Practice questions

13If the temperature inversion layer is thick what effect on pollution dispersion is more likely?यदि तापमान उलटाव की परत मोटी है तो प्रदूषण फैलाव पर क्या प्रभाव अधिक संभव है?

15If temperature is higher than expected from latitude which combination is most suitable?यदि तापमान अपेक्षित अक्षांशीय ताप से अधिक है तो कौन सा संयोजन सबसे उचित है?

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13If the temperature inversion layer is thick what effect on pollution dispersion is more likely?

15If temperature is higher than expected from latitude which combination is most suitable?