Climate – Short Answer Type Questions
Class: CBSE Class 9
Subject: Social Science — Geography
Chapter: 4 — Climate
Geography: Contemporary India – I — Chapter 4: Climate
50 short answer-type questions (topic-wise) with clear, exam-focused answers — NCERT-aligned for CBSE Class 9 revision.
CBSE Board Focus
- Understand concepts, controls & seasons
- Explain factors affecting rainfall and monsoon
- Answer short descriptive questions with examples
Content Bank — Topic-wise Questions
Topics: Concept of Climate | Climatic Controls | Latitude | Altitude | Pressure & Winds | Seasons | Distribution of Rainfall | Monsoon as a Unifying Bond
Concept of Climate (Q1–Q6)
Q1. Define climate and explain how it differs from weather.
Climate is the long-term average of weather conditions of a region, typically measured over 30 years or more. Weather refers to short-term atmospheric conditions (daily or weekly). Climate describes the usual pattern; weather describes the current state.
Q2. Why is climate important in geography?
Climate affects vegetation, agriculture, settlement patterns, and water resources. Studying climate helps understand regional differences and plan for resource management, crop selection and disaster preparedness.
Q3. What parameters are commonly used to describe climate?
Temperature, precipitation (rainfall), humidity, wind patterns, and atmospheric pressure are commonly used to describe climate of a region.
Q4. What is meant by tropical climate?
A tropical climate is characterised by high temperatures year-round and significant seasonal rainfall, commonly found near the equator and low latitudes.
Q5. How does long-term climate data help in agriculture?
Long-term climate data informs farmers about expected rainfall patterns and temperature ranges, which supports crop planning, sowing times and irrigation strategies to improve yields.
Q6. Give an example of how climate influences human activity.
In regions with heavy monsoon rainfall, agriculture (rice cultivation) dominates; in arid areas, people rely on drought-resistant crops and irrigation. Festivals and cultural events are also timed to seasons.
Climatic Controls (Q7–Q13)
Q7. What are climatic controls? Give two examples.
Climatic controls are physical factors that determine a region's climate. Examples include latitude, altitude, distance from the sea, and pressure and wind systems.
Q8. How does distance from the sea influence climate?
Coastal areas have maritime climates with moderate temperatures and higher humidity due to nearby oceans; interiors are more continental with larger temperature extremes and often lower humidity.
Q9. Explain the role of mountains in determining climate.
Mountains force air to rise, causing cooling and condensation (orographic rainfall) on windward slopes while creating dry rain-shadow regions on leeward sides, leading to varied local climates.
Q10. What influence does the Indian Ocean have on India’s climate?
The Indian Ocean supplies moisture-laden winds that fuel the southwest monsoon. It also moderates coastal temperatures and affects humidity levels along the coasts.
Q11. Why is the monsoon considered a climatic control for India?
Because the monsoon’s seasonal reversal of winds brings the majority of India’s rainfall, influencing temperature, agriculture and water resources across the country.
Q12. How do ocean currents affect climate?
Ocean currents transfer heat across the globe; warm currents raise temperatures of nearby coastal regions while cold currents lower them, affecting local climate and fishing activities.
Q13. Mention one human activity that modifies local climate.
Urbanisation leads to heat islands where temperatures are higher than surrounding rural areas due to concrete surfaces and reduced vegetation.
Latitude (Q14–Q18)
Q14. Briefly explain how latitude affects climate.
Latitude determines the angle of solar radiation; regions near the equator receive more direct sunlight making them warmer, while higher latitudes get slanted rays and are cooler.
Q15. What is India’s latitudinal range and why is it significant?
India lies roughly between 8°N and 37°N, covering tropical to subtropical zones. This range leads to varied climates from humid tropics in the south to cooler northern regions.
Q16. How does latitude influence seasonal contrasts in India?
Higher latitudes in northern India experience greater seasonal temperature variation because of changes in solar angle between summer and winter compared to southern low latitudes.
Q17. Do equatorial regions have distinct seasons like India?
Equatorial regions often have less temperature variation and more uniform climates, with seasons distinguished mainly by rainfall rather than temperature changes.
Q18. Give one example of latitude affecting vegetation in India.
Tropical evergreen forests in the southern lowlands exist due to high temperature and rainfall, while temperate forests occur in higher latitude/higher altitude Himalayan regions.
Altitude (Q19–Q23)
Q19. Explain the lapse rate briefly.
The lapse rate is the rate at which air temperature decreases with altitude, roughly 6.5°C per 1000 metres in the troposphere, causing cooler climates at higher elevations.
Q20. Why do mountains receive snowfall while plains do not?
Higher altitudes have lower temperatures, often below freezing, allowing precipitation to fall as snow; plains are warmer and receive rain instead.
Q21. How does altitude affect human settlement patterns?
Higher altitude areas have sparser settlements due to harsh climate and difficult terrain, while plains and coastal lowlands support dense populations and agriculture.
Q22. Give an example of altitude creating local climate differences in India.
Shimla is much cooler than nearby plains in Himachal Pradesh due to its higher altitude, attracting people to hill stations in summer.
Q23. Can altitude influence rainfall? Explain.
Yes — mountains force moist air to ascend, cool and condense, producing orographic rainfall on windward slopes while leeward sides remain drier.
Pressure and Winds (Q24–Q31)
Q24. How are pressure differences created in the atmosphere?
Pressure differences are created by unequal heating of Earth's surface; warmer regions develop low pressure and cooler regions develop high pressure, causing air movement (winds).
Q25. Describe in brief the mechanism of the southwest monsoon.
In summer, intense heating of the Asian landmass creates low pressure, drawing moist air from the Arabian Sea and Bay of Bengal. These moist southwest winds bring heavy rainfall over India.
Q26. What are the main branches of the southwest monsoon?
The two main branches are the Arabian Sea branch (which moves north along the west coast) and the Bay of Bengal branch (which moves northwards along the east coast into northeastern India).
Q27. Explain the role of the Tibetan Plateau in monsoon circulation.
The Tibetan Plateau heats up in summer and contributes to the formation of a strong low-pressure area over northwestern India and central Asia, enhancing the monsoon circulation.
Q28. Why are winter winds dry over most of India?
In winter, high pressure over the Eurasian landmass pushes cold, dry air southwards; these northeast winds travel over land, carrying little moisture and causing dry conditions.
Q29. What is the Inter-Tropical Convergence Zone (ITCZ)?
ITCZ is a belt near the equator where trade winds from both hemispheres converge, leading to rising air and frequent precipitation; its seasonal shift influences monsoon patterns.
Q30. How does pressure gradient affect wind speed?
The stronger the pressure gradient (difference between high and low pressure), the faster the wind as air moves more rapidly to equalize pressure differences.
Q31. Mention one way in which winds influence temperature.
Winds from the sea moderate temperatures of coastal areas, while continental winds from land can bring extreme hot or cold temperatures depending on season.
Seasons of India (Q32–Q41)
Q32. List and briefly describe the four seasons recognised in NCERT.
Cold weather (Dec–Feb): dominated by dry, cool northeast winds; Hot weather (Mar–May): rising temperatures and pre-monsoon thunderstorms; Advancing monsoon (Jun–Sep): southwest monsoon rains; Retreating monsoon (Oct–Nov): withdrawal of rains and occasional cyclonic showers.
Q33. What causes the onset of the hot weather season?
Increasing solar radiation and lengthening days in spring raise temperatures, leading to hot conditions and formation of low pressure over the interior, which precedes monsoon onset.
Q34. Explain the term 'nor'wester' and where it occurs.
'Nor'westers' are sudden, violent thunderstorms accompanied by gusty winds, common in eastern India (West Bengal, Bihar, Odisha) during the pre-monsoon hot season.
Q35. How does the retreating monsoon affect southern India?
During retreating monsoon, the eastern coast (Tamil Nadu and parts of Andhra Pradesh) may receive cyclonic rainfall from depressions in the Bay of Bengal; some regions become dry and pleasant.
Q36. Why is winter in northern India colder than in southern India?
Northern India is at higher latitudes and often farther from maritime influence; cold continental air masses from Eurasia lead to lower winter temperatures, unlike the moderating coastal south.
Q37. What is the agricultural importance of the monsoon season?
Monsoon provides water for Kharif crops like rice, maize and pulses and influences sowing dates, crop yields and irrigation planning vital for rural economy.
Q38. Describe one typical weather feature of the hot season in northwest India.
Extreme heat with high daytime temperatures, dust storms and scarcity of moisture, often culminating in pre-monsoon thunderstorms in some areas.
Q39. What causes fog in northern plains during winter?
Clear skies and calm winds during cold winter nights lead to radiational cooling, causing moisture near the surface to condense as fog.
Q40. How does seasonal change influence tourism in hill stations?
Hill stations attract tourists in summer for relief from heat, while winter may attract visitors for snowfall; seasonal accessibility and weather govern tourist flows and local economy.
Distribution of Rainfall (Q41–Q46)
Q41. Why do northeastern India and the windward side of the Himalayas receive heavy rainfall?
Moist monsoon winds from the Bay of Bengal ascend the Himalayan slopes and cool, causing heavy orographic rainfall on the windward side and in the northeast.
Q42. Explain why the western coast of India is wet.
The Arabian Sea branch of the southwest monsoon strikes the western coast and is forced upward by the Western Ghats, producing heavy rainfall along the windward coast (Konkan and Malabar).
Q43. What causes the Thar Desert to be dry?
The Thar Desert lies in the rain-shadow region of the Aravalli and is far from moisture-bearing winds, receiving scanty rainfall and high evaporation rates.
Q44. How does relief influence rainfall distribution in peninsular India?
Local hills and plateaus cause variability — windward slopes get more rain due to uplift, while leeward areas and interior plateaus receive less, creating pockets of high and low rainfall.
Q45. Give two examples of regions with very high and very low rainfall respectively.
Very high: Mawsynram/Cherrapunji (Northeast); Very low: Western Rajasthan (Thar Desert).
Q46. Why is accurate knowledge of rainfall distribution important?
It guides water resource planning, agriculture zoning, flood management and infrastructure design to reduce climate-related risks and improve crop choices.
Monsoon — A Unifying Bond (Q47–Q50)
Q47. Explain briefly how the monsoon acts as a unifying bond for India.
The monsoon synchronises agricultural cycles, water availability and social life across diverse regions. Despite regional differences, the timing and impact of monsoon link economies, festivals and food systems nationwide.
Q48. Mention an economic consequence of monsoon failure.
Monsoon failure can lead to crop failure, reduced rural incomes, increased food prices, strain on government relief measures, and slowed economic growth in agrarian sectors.
Q49. How does monsoon impact cultural practices?
Many festivals, rituals and traditional practices in India are tied to the beginning or continuation of monsoon rains, reflecting its central role in agrarian life.
Q50. Suggest one measure to reduce monsoon-related agricultural risk.
Diversify crops, implement efficient irrigation (drip), invest in water harvesting, and adopt weather-indexed insurance to reduce vulnerability to monsoon variability.