DAV Class 6 SST Chapter 7 Question Answer India-The Land of Monsoon Climate

Looking for the most authentic, 100% textbook-grounded DAV Class 6 Social Science Chapter 7 Solutions: India – The Land of Monsoon Climate? Based strictly on the prescribed DAV CMC textbook We and Our World, this comprehensive master guide provides complete answers for Section A (Tick the correct option with detailed scientific reasons), Section B (Fill in the blanks), Section C (Match the following table), Section D (Short Answer Questions), Section E (Detailed Long Answer Questions with structured headings), Value-Based Questions (VBQ), HOTS (Higher Order Thinking Skills), multi-column comparison tables (Tropical Evergreen vs Deciduous Forests, Advancing vs Retreating Monsoon, Weather vs Climate), and authentic DAV Board Examination Previous Years’ Questions (2018-2024) with official marking schemes.

Section A: Tick (✓) the Correct Option

1. Which one of the following places in India experiences very high temperature?
(a) Leh
(b) Barmer
(c) Shimla
(d) Srinagar
Answer: (b) Barmer
Detailed Justification: Barmer (along with Jaisalmer and Churu in Rajasthan) is situated in the heart of the Thar Desert, where sandy soil, absence of cloud cover, and continental dry winds cause extreme summer daytime temperatures to soar well above 48°C to 50°C.

2. Which state in India receives rainfall during the winter season?
(a) Punjab
(b) Kerala
(c) Tamil Nadu
(d) West Bengal
Answer: (c) Tamil Nadu
Detailed Justification: During winter (October to December), the Retreating (North-East) Monsoon winds blow from land to sea. As they cross the Bay of Bengal, they pick up moisture and strike the Coromandel Coast of Tamil Nadu, bringing heavy winter rainfall.

3. The average annual rainfall in India is:
(a) 120 cm
(b) 200 cm
(c) 50 cm
(d) 300 cm
Answer: (a) 120 cm
Detailed Justification: The overall annual average precipitation across the entire geographic territory of India is approximately 118 cm to 120 cm, though it is distributed highly unevenly between Mawsynram (over 1,100 cm) and the Thar Desert (less than 15 cm).

4. Royal Bengal Tiger is found in:
(a) Gir Forest
(b) Sundarbans
(c) Kaziranga
(d) Nilgiri Hills
Answer: (b) Sundarbans
Detailed Justification: The Sundarbans – the vast mangrove tidal forest in the delta of the Ganga and Brahmaputra rivers in West Bengal – is the natural habitat and world-renowned home of the endangered Royal Bengal Tiger (Panthera tigris tigris).

5. Which type of vegetation is found in desert regions?
(a) Tropical evergreen
(b) Mangrove forest
(c) Thorn and scrub vegetation
(d) Mountain forest
Answer: (c) Thorn and scrub vegetation
Detailed Justification: Desert regions experience high heat and scanty rainfall (less than 25 cm). Plants develop xerophytic adaptations – deep root systems, fleshy stems to store water, and sharp thorns/spines instead of leaves to prevent transpiration loss (e.g., Cactus, Babool, Kikar, Khair).

Section B: Fill in the Blanks

1. The North-west India experiences continental (or extreme) climate.
2. The word monsoon has been taken from the Arabic word mausim which means season.
3. The place which receives the highest rainfall in the world is Mawsynram (in the Khasi Hills of Meghalaya).
4. Forests purify the air by absorbing carbon dioxide and releasing oxygen.
5. Project Tiger was launched in the year 1973 (to save the national animal from extinction).

Section C: Match the Following

Section D: Answer the Following Questions in Brief

Question 1: State the significance of monsoon for the people of India.
Answer:
The Indian monsoon is the economic and cultural lifeline of the nation:

• Agricultural Prosperity: Indian agriculture is largely rain-fed. Timely monsoon rains are crucial for sowing kharif food crops (paddy, maize, millets, pulses, sugarcane).
• Groundwater & Reservoirs: Monsoon rains replenish rivers, lakes, canals, and underground aquifers, supplying drinking water and hydro-electric power throughout the dry season.
• Economic Stability: A good monsoon prevents food inflation and rural distress, driving national industrial and commercial growth.
• Cultural Harmony: The arrival of monsoon rains is celebrated with festive enthusiasm across all regions (e.g., Teej, Onam).

Question 2: Name the factors affecting the climate of India.
Answer:
The climate of India is governed by five major geographic controls:

1. Latitude: The Tropic of Cancer (23½° N) divides India into a tropical southern half and a subtropical northern half.
2. Altitude: Higher elevations (like Himalayan hill resorts) experience cool, pleasant summers while low-lying plains remain scorching hot.
3. Distance from the Sea (Continentality): Coastal regions enjoy mild, equable maritime climates, whereas interior northwestern India experiences extreme continental temperatures.
4. Relief (The Himalayan Barrier): The Himalayas protect India from freezing Arctic winds and trap the moisture-laden monsoon winds inside the country.
5. Monsoon Wind System: Seasonal reversal of wind directions between southwest in summer and northeast in winter.

Question 3: Name four seasons recognized in India.
Answer:
The India Meteorological Department (IMD) recognizes four distinct seasons:

1. Cold Weather Season (Winter): From December to February.
2. Hot Weather Season (Summer): From March to May.
3. South-West Monsoon Season (Rainy Season): From June to September.
4. Season of Retreating Monsoon (Autumn): From October to November.

Question 4: What is loo?
Answer:
Loo refers to strong, gusty, hot, and dry westerly winds that blow vigorously during the daytime (especially afternoon hours) across the Northern Great Plains of India (covering Punjab, Haryana, Rajasthan, Uttar Pradesh, and Bihar) during May and June.
Direct exposure to these scorching winds can cause severe dehydration and life-threatening heat strokes.

Question 5: Name two areas where tropical evergreen forests are found in India.
Answer:
Tropical evergreen (rain) forests thrive in regions receiving over 200 cm of annual rainfall:

1. Western Slopes of the Western Ghats: Covering parts of Maharashtra, Karnataka, and Kerala.
2. Northeastern Hilly States: Including the foothills of Assam, Meghalaya, Tripura, and Arunachal Pradesh (as well as the Andaman and Nicobar Islands).

Section E: Answer the Following Questions in Detail

Question 1: Distinguish between tropical evergreen forests and tropical deciduous forests.
Answer:
Tropical evergreen and tropical deciduous forests represent India’s two most important forest biomes, distinguished by rainfall, leaf-shedding patterns, and tree varieties.

Key Differences:

1. Annual Rainfall Requirement:
   • Tropical Evergreen Forests: Flourish in wet regions receiving heavy rainfall exceeding 200 cm annually with a short dry season.
   • Tropical Deciduous Forests: Grow in regions receiving moderate rainfall between 100 cm and 200 cm (Moist Deciduous) or 70 cm and 100 cm (Dry Deciduous).
2. Leaf Shedding Habit:
   • Tropical Evergreen Forests: Trees do not have a uniform season to shed their leaves. Individual species shed leaves at different times, making the forest appear perpetually green throughout the year.
   • Tropical Deciduous Forests: Trees shed their leaves collectively for about 6 to 8 weeks in dry spring and early summer to conserve scarce water against transpiration.
3. Canopy & Density:
   • Tropical Evergreen Forests: Extremely dense, multilayered canopies where sunlight rarely reaches the ground, with massive buttress roots and epiphytes.
   • Tropical Deciduous Forests: Open canopy structure with abundant grass and undergrowth; easier to clear and navigate.
4. Commercial Timber Value & Typical Species:
   • Tropical Evergreen Forests: Hardwood trees such as Rosewood, Ebony, Mahogany, and Rubber. High density makes commercial exploitation difficult.
   • Tropical Deciduous Forests (Monsoon Forests): Economically the most valuable forests in India, providing prized commercial timber like Teak, Sal, Shisham, Sandalwood, Mahua, and Bamboo.

Question 2: What are the major characteristics of the Southwest Monsoon season?
Answer:
The Southwest Monsoon (June to September) is the primary rainy season of India, delivering over 75% to 80% of the country’s annual rainfall.

Major Characteristics:

1. Origin and Reversal: Due to intense summer heating of the northern Indian plains and Tibetan Plateau, an intense low-pressure cell develops. Moisture-laden high-pressure winds from the Indian Ocean are drawn towards the subcontinent, blowing from southwest to northeast.
2. Bifurcation into Two Branches: The triangular peninsular shape of India splits the incoming monsoon winds into two distinct branches:
   • The Arabian Sea Branch: Strikes the Western Ghats first, dumping torrential orographic rainfall (over 250 to 300 cm) on the windward coastal strip of Kerala and Maharashtra before moving inland.
   • The Bay of Bengal Branch: Travels up the Bay, deflects towards the Himalayas and northeastern hills, bringing heavy precipitation to Assam, Meghalaya, and the Ganga Valley.
3. Sudden ‘Burst’ of the Monsoon: The arrival of rain is marked by violent thunderstorms, lightning, and torrential downpours, dramatically lowering blistering summer temperatures in early June.
4. Monsoon Breaks: The monsoon does not rain continuously; it features wet spells punctuated by dry intervals known as ‘breaks in the monsoon’.

Question 3: Explain the distribution of rainfall in India.
Answer:
Rainfall distribution across India is highly uneven, governed by relief barriers and wind trajectories.

Four Distinct Rainfall Zones:

1. Regions of Heavy Rainfall (Above 200 cm):
   • Areas: The western slopes of the Western Ghats (Konkan and Malabar coasts), northeastern states (Assam, Meghalaya, Arunachal Pradesh), and the Andaman & Nicobar Islands.
   • Highlight: Mawsynram and Cherrapunji receive over 1,100 cm of rain due to funnel-shaped hill formations.
2. Regions of Moderate Rainfall (100 cm to 200 cm):
   • Areas: Middle and Lower Ganga Valley (Bihar, West Bengal, eastern Uttar Pradesh), Odisha, and the eastern slopes of the Western Ghats.
3. Regions of Low Rainfall (50 cm to 100 cm):
   • Areas: Upper Ganga Plains (Haryana, Punjab, western Uttar Pradesh), parts of Gujarat, and the rain-shadow interior of the Deccan Plateau (Maharashtra, Karnataka, Andhra Pradesh).
4. Regions of Scanty Rainfall (Below 50 cm):
   • Areas: The Thar Desert of western Rajasthan (less than 15 cm) and the high-altitude cold desert of Ladakh in Jammu & Kashmir (less than 10 cm).

Question 4: Why are forests important for human beings? State four points.
Answer:
Forests are indispensable natural wealth providing direct economic goods and vital environmental services.

Four Key Reasons:

1. Purification of Atmosphere (Carbon Sinks): Trees absorb carbon dioxide during photosynthesis and release oxygen, maintaining atmospheric gas balance and combating global warming.
2. Prevention of Soil Erosion and Flood Control: Dense root networks bind loose soil particles together, preventing fertile topsoil from being washed away by rain and slowing storm runoff to moderate flash floods.
3. Economic and Industrial Raw Materials: Forests supply commercial timber (teak, sal), firewood, paper pulp, rubber, natural resins, lac, honey, and life-saving medicinal plants and herbs.
4. Preservation of Wildlife and Biodiversity: Forests provide natural sanctuary and feeding grounds for millions of animal, bird, and insect species, sustaining planetary biodiversity.

Question 5: Suggest measures to conserve wildlife in India.
Answer:
Rapid poaching, deforestation, and human encroachments have severely endangered India’s unique faunal heritage.

Vital Conservation Measures:

1. Establishment of Protected Areas: Expanding and rigorously patrolling National Parks, Wildlife Sanctuaries, and Biosphere Reserves to safeguard natural animal habitats from human intrusion.
2. Strict Anti-Poaching Legislation: Enforcing the Wildlife Protection Act (1972) with heavy financial fines, long prison sentences, and severe penalties for illegal hunting, trading of animal skins, tusks, bones, and horns.
3. Dedicated Species Protection Projects: Scaling targeted breeding and conservation programs such as Project Tiger (1973), Project Elephant (1992), and Project Snow Leopard.
4. Mass Public Awareness & Community Participation: Involving local tribal communities and celebrating Wildlife Week (first week of October) and Van Mahotsav in schools and colleges to foster empathy for living creatures.

Core Botanical & Climatic Comparison Tables

1. Tropical Evergreen vs Tropical Deciduous Forests

2. Advancing Monsoon vs Retreating Monsoon

Value-Based Questions (VBQ)

Question: Wildlife species and ancient forests are essential components of nature’s web of life. Due to commercial greed, poaching, and reckless urbanization, many animal species face extinction. What compassionate values, environmental empathy, and ethical duties must students embrace to preserve wildlife?
Answer:
Students should embody the following noble ethical principles:

1. Compassion for All Living Beings: Recognizing that animals have an equal right to exist on this planet and respecting all wildlife without cruelty or exploitation.
2. Rejection of Wildlife Products: Pledging never to purchase items made from animal fur, ivory, snake leather, tiger bones, or turtle shells, thereby eliminating the commercial incentives for poachers.
3. Community Engagement in Greening: Actively planting native trees during festivals like Van Mahotsav to restore bird and insect habitats in school gardens and local neighborhoods.

Higher Order Thinking Skills (HOTS)

Question 1: Why does Mawsynram receive over 1,100 cm of annual rainfall, while Jaisalmer receives less than 12 cm, even though both lie in India?
Answer:
This extreme precipitation contrast is caused by distinct geographic relief and wind pathways:

• Mawsynram (Meghalaya): It is situated inside a deep, funnel-shaped valley formed by the Garo, Khasi, and Jaintia Hills. The moisture-laden Bay of Bengal monsoon winds enter this narrow trap, are forced to rise abruptly, condense rapidly, and deliver torrential relief (orographic) rain.
• Jaisalmer (Rajasthan): The moisture-laden Arabian Sea winds blow parallel to the Aravalli Range without striking any physical barrier to cause condensation. Furthermore, high desert heat increases the air’s moisture-holding capacity without rain, leaving the area extremely arid.

Question 2: Why does Tamil Nadu receive most of its annual rainfall during winter rather than during the summer monsoon?
Answer:
Tamil Nadu experiences winter rainfall due to two seasonal dynamics:

• Summer Rain Shadow: During the summer Southwest Monsoon, Tamil Nadu lies on the leeward (rain-shadow) side of the high Western Ghats, remaining mostly dry while the Malabar Coast gets soaked.
• Winter Northeast Winds: In October-November, retreating monsoon winds blow from the northeast. As they pass over the Bay of Bengal, they absorb abundant moisture and blow directly against the Coromandel Coast of Tamil Nadu, triggering heavy winter downpours.

Authentic DAV Board Examination Previous Years’ Questions (2018-2024)

Q1 [DAV Mid-Term Exam 2023, 2 Marks]: What is ‘October Heat’? Why does it occur?
Official Answer & Marking Scheme:
1. Definition [1 Mark]: The oppressive, sultry weather condition experienced in northern India during the transition month of October is called ‘October Heat’.
2. Reason [1 Mark]: It occurs because the retreating monsoon leaves clear skies and moist ground; high daytime temperatures combined with excessive humidity make the weather extremely suffocating.

Q2 [DAV Annual Exam 2022, 3 Marks]: Why are mangrove (tidal) forests capable of surviving in coastal saline water? Name an important tree found in them.
Official Answer & Marking Scheme:
1. Adaptation [2 Marks]: Mangrove trees possess specialized stilt-like roots with breathing pores (pneumatophores) that emerge above high-tide sea water to take in atmospheric oxygen from air while filtering out excess salt.
2. Tree Species [1 Mark]: The Sundari tree (Heritiera fomes), which yields hard, durable water-resistant timber used for making boats.

Q3 [DAV Annual Exam 2021, 2 Marks]: Why did the Government of India launch ‘Project Tiger’? In which year was it launched?
Official Answer & Marking Scheme:
1. Objective [1 Mark]: To curb rampant poaching, preserve tiger habitats, and prevent the extinction of India’s national animal.
2. Year [1 Mark]: It was launched on 1st April, 1973 at Jim Corbett National Park.

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