Maharashtra Board Class 7 Geography Chapter 5 Winds Solutions

Rewrite The Following Statements After Choosing The Correct Option:

Question 1. When the air expands, it –
(a) becomes solid,
(b) becomes thinner,
(c) gets lost.
(d) becomes humid.
Answer: (b) becomes thinner,
In simple words: When air warms up and expands, its molecules spread out, causing it to become less dense, or thinner.

🎯 Exam Tip: Understanding the relationship between temperature, expansion, and density of air is crucial for explaining atmospheric phenomena.

Question 2. From high air pressure regions, winds _______.
(a) blow to regions of still higher pressure.
(b) blow towards regions of cooler air.
(c) blow towards regions of low air pressure.
(d) remains still.
Answer: (c) blow towards regions of low air pressure.
In simple words: Air naturally moves from areas where there is a lot of pressure to areas where there is less pressure, creating wind.

🎯 Exam Tip: The fundamental principle of wind movement is air flowing from high pressure to low pressure; remember this concept for all wind-related questions.

Question 3. In the northern hemisphere, winds blowing towards the equator due to the ______ rotation of the earth.
(a) turn to the south
(b) turn to the east,
(c) turn to the west
(d) turn to the north.
Answer: (c) turn to the west
In simple words: Due to the Earth's rotation (Coriolis effect), winds in the Northern Hemisphere are deflected to the right, causing equator-bound winds to turn westward.

🎯 Exam Tip: The Coriolis effect is a key concept; always link it to the deflection of winds (right in Northern, left in Southern Hemisphere).

Question 4. The direction of seasonal winds blowing over the Indian subcontinent during winter is from the _______.
(a) south-east to north-west.
(b) south-west towards north-east.
(c) north-east to south-west.
(d) north-west to south-east.
Answer: (c) north-east to south-west.
In simple words: During winter, the monsoon winds over India typically blow from the colder landmass in the north-east towards the warmer oceans in the south-west.

🎯 Exam Tip: For monsoon winds, remember that their direction changes seasonally, driven by temperature and pressure differences between land and sea.

Question 5. The Roaring Forties in the southern hemisphere _______.
(a) blow towards the equator.
(b) blow in the areas around 40°S parallel.
(c) blow from the subpolar region of low pressure.
Answer: (b) blow in the areas around 40°S parallel.
In simple words: The "Roaring Forties" refer to strong westerly winds found in the Southern Hemisphere, specifically between latitudes 40 and 50 degrees south.

🎯 Exam Tip: These specific wind belts (Roaring Forties, Furious Fifties, Screaming Sixties) are distinct to the Southern Hemisphere due to less landmass; know their approximate latitudinal locations.

Identify The Type Of Winds From The Description Given Below:

Question 1. These winds from the south-west bring rains to Indian subcontinent. During June to September, India gets rains. After this period these winds retreat.
Answer: South West Monsoon Winds.
In simple words: These are seasonal winds, blowing from the Arabian Sea and Bay of Bengal towards India during summer, bringing heavy rainfall, and then retreating.

🎯 Exam Tip: When identifying monsoon winds, focus on their seasonal nature and the specific period they bring rain to a region.

Question 2. These winds blowing from the north pole region towards 60°N parallel cause cold wave conditions in extensive areas covering North America, Europe and Russia
Answer: Polar Winds.
In simple words: These are cold, dry winds originating from the polar high-pressure zones and blowing towards lower latitudes, bringing extreme cold.

🎯 Exam Tip: Polar winds are characterized by their origin (poles), temperature (cold), and the widespread cold conditions they cause.

Question 3. Hilltops get heated quickly during the day. The air in this part becomes hot, light and starts ascending. Hence, a low pressure area forms in this region. At the same time the air at the foothills become cooler and also experiences high pressure. Air in that area blows towards low pressure.
Answer: Valley Winds.
In simple words: These are local winds that blow up a valley from the foothills towards the heated hilltops during the day due to temperature and pressure differences.

🎯 Exam Tip: For valley winds, remember the daytime heating of hilltops creates low pressure, drawing air upwards from the cooler valley.

Given Below Are The Values Of Air Pressure In Millibars. Using The Same, Draw Diagrams To Show A Cyclone And An Anticyclone:

Question 1. 990, 994, 996,1000
Answer:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक चक्रवात (साइक्लोन) को दर्शाता है। इसमें केंद्रीय भाग में कम दबाव (990 मिलीबार) है, जिसके चारों ओर दबाव बढ़ रहा है (994, 996, 1000 मिलीबार)। हवा उच्च दबाव वाले क्षेत्रों से कम दबाव वाले केंद्र की ओर सर्पिल गति में अंदर की ओर बहती हुई दिखाई गई है, जो उत्तरी गोलार्ध में वामावर्त दिशा में होती है।
In simple words: A cyclone is a weather system characterized by a low-pressure center surrounded by higher pressure, causing winds to spiral inward.

🎯 Exam Tip: Always associate cyclones with a low-pressure center and inward-spiraling winds. The diagram should clearly show isobars decreasing towards the center.

Question 2. 1030,1020,1010,1000
Answer:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक प्रतिचक्रवात (एंटीसाइक्लोन) को दर्शाता है। इसमें केंद्रीय भाग में उच्च दबाव (1030 मिलीबार) है, जिसके चारों ओर दबाव घट रहा है (1020, 1010, 1000 मिलीबार)। हवा उच्च दबाव वाले केंद्र से कम दबाव वाले क्षेत्रों की ओर सर्पिल गति में बाहर की ओर बहती हुई दिखाई गई है, जो उत्तरी गोलार्ध में दक्षिणावर्त दिशा में होती है।
In simple words: An anticyclone is a weather system with a high-pressure center, causing winds to spiral outward from the center.

🎯 Exam Tip: For anticyclones, remember the high-pressure center and outward-spiraling winds. The diagram should show isobars increasing towards the center.

State One Reason Why:

Question 1. A belt of calm exists near the equator.
Answer:
(i) A belt of calm exists near the equator because there is not much difference in the temperature and air pressure.
(ii) So winds do not blow in this region.
In simple words: The equatorial region experiences little temperature and air pressure variation, leading to a calm zone with minimal wind movement.

🎯 Exam Tip: The equatorial calm belt, also known as the Doldrums, is characterized by stable temperatures and low-pressure, preventing strong winds.

Question 2. The winds coming from the north-west in the southern hemisphere have greater velocities than the winds coming from the south-west in the northern hemisphere.
Answer:
(i) In the southern hemisphere the obstacle caused by the relief of the land surface is almost absent.
(ii) Therefore the winds coming from the north - west in the southern hemisphere have greater velocity than the winds coming from the south-west in the northern hemisphere.
In simple words: Southern Hemisphere winds, especially westerlies, blow stronger because there is less landmass to create friction and obstruct their flow compared to the Northern Hemisphere.

🎯 Exam Tip: Wind velocity is significantly affected by surface friction; the vast oceans of the Southern Hemisphere allow winds to gain higher speeds.

Question 3. The monsoon winds in the summer come from the sea but the retreating monsoon winds come from land.
Answer:
(i) Monsoon winds are generated due to the uneven heating of land and water in the different seasons.
(ii) During summers, land heats up quickly as compared to water & an area of low pressure is created on the land whereas an area of high pressure is created on the water.
(iii) But during winters low pressure is created on the water and an area of high pressure is created on land as it cools down quickly as compared to the water.
(iv) As winds blow from high pressure areas to low pressure areas, it blows from sea to land in summers & from land to sea in winters.
Thus the monsoon winds in summer come from sea but the retreating monsoon winds come from land.
In simple words: Monsoon winds shift direction seasonally because land and sea heat and cool at different rates, causing changes in pressure systems that drive wind flow.

🎯 Exam Tip: Emphasize the differential heating and cooling of land and water as the primary cause for the seasonal reversal of monsoon winds.

Complete The Flow Chart:

ℹ️ चित्र व्याख्या (Diagram Explanation): यह एक अधूरा प्रवाह चार्ट है जो हवाओं के प्रकारों को वर्गीकृत करता है। इसमें 'Types of Winds' शीर्ष पर है, और फिर 'Planetary Winds' और 'NE Monsoon Winds' जैसे उप-वर्ग हैं, जिनमें कुछ खाली बॉक्स भी दिखाए गए हैं जिन्हें पूरा किया जाना है।
Answer:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह प्रवाह चार्ट हवाओं के विभिन्न प्रकारों को पूर्ण रूप से वर्गीकृत करता है। इसमें 'Types of Winds' से शुरू होकर 'Planetary Winds', 'Seasonal Winds' और 'Local Winds' में विभाजित किया गया है। फिर इन मुख्य श्रेणियों को आगे उनकी उप-श्रेणियों में विस्तृत किया गया है, जैसे 'Planetary Winds' में 'Easterlies', 'Westerlies', 'Polar' और 'Seasonal Winds' में 'SW Monsoon Winds' और 'NE Monsoon Winds' शामिल हैं, साथ ही 'Local Winds' में 'Mountain Winds', 'Valley Winds', 'Land Breeze' और 'Sea Breeze' भी दिखाए गए हैं।
In simple words: The completed flowchart categorizes winds into Planetary, Seasonal, and Local types, with further subdivisions like Easterlies, Monsoons, and Land/Sea Breezes.

🎯 Exam Tip: Flow charts are excellent for visualizing classifications. Ensure all major and minor wind types are correctly placed and connected to demonstrate a full understanding of wind systems.

Answer In Short:

Question 1. Why is the air pressure high in polar areas in both the hemispheres?
Answer:
• In both the polar areas the temperature here is below 0°C.
• Hence the air is cold & heavy.
• Hence the air pressure is high in the polar areas in both the hemispheres.
In simple words: Polar regions are extremely cold, causing the air to contract and become dense, which results in high atmospheric pressure.

🎯 Exam Tip: Remember the inverse relationship: cold, dense air creates high pressure; warm, light air creates low pressure.

Question 2. What effect does the rotation of the earth have on the wind?
Answer:
• The direction of the winds is influenced by the rotation of the earth.
• In the northern hemisphere, winds get deflected towards the right of their original direction, whereas in the southern hemisphere they get deflected toward the left of their original direction.
In simple words: The Earth's rotation causes a force called the Coriolis effect, which deflects winds to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

🎯 Exam Tip: The Coriolis effect is crucial for understanding global wind patterns; clearly state the direction of deflection for each hemisphere.

Question 3. Why do the cyclonic winds blow in a circular manner?
Answer:
(i) Cyclones are created when a low pressure area is surrounded by high pressure areas. In these conditions, winds start blowing towards the low pressure area from the surrounding high pressure areas.
(ii) But due to the rotation of the earth in the northern hemisphere the winds deflected towards the right of their original direction whereas in the southern hemisphere they get deflected towards the left of their original direction which causes the cyclone winds to blow in a circular manner.
In simple words: Cyclonic winds blow circularly because the Coriolis effect, caused by Earth's rotation, deflects the air flowing into a low-pressure center, creating a spiral motion.

🎯 Exam Tip: Always connect the circular motion of cyclonic winds to the Coriolis effect acting on air moving towards a low-pressure zone.

Question 4. State the reasons that lead to the formation of cyclones and describe the effects of cyclones.
Answer:
(i) Cyclonic conditions are created when a low pressure area is surrounded by high pressure areas.
(ii) In these conditions, winds start blowing towards the low pressure area from the surrounding high pressure areas.
(iii) The effects of cyclone are as follows.
• The sky is cloudy
• Winds blow with a very high velocity
• It rains heavily
• It may cause loss of life and property in coastal regions.
In simple words: Cyclones form when air rushes into a low-pressure center, and their effects include cloudy skies, very high-speed winds, heavy rainfall, and potential destruction, especially in coastal areas.

🎯 Exam Tip: When describing cyclones, ensure you cover both their formation (low pressure surrounded by high) and their characteristic destructive effects (strong winds, heavy rain, damage).

Activity:

Using the internet, obtain information, photos and maps of the recent cyclone that arrived at India's eastern coast. Write the social and economic effects of that cyclone.

ICT Question:

Use the mobile app 'Windyty' and try to know the direction of winds and pressure areas in the world.

Formative Assessment

Can You Tell?

Observe The Diagrams Given Below. Answer The Questions Related To Sea And Land Breeze

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र समुद्री समीर (sea breeze) को दर्शाता है। दिन के समय, जमीन पर हवा गर्म होकर ऊपर उठती है जिससे कम दबाव का क्षेत्र बनता है। समुद्र पर हवा ठंडी रहती है और उच्च दबाव का क्षेत्र बनता है। परिणामस्वरूप, कूलर समुद्री हवा समुद्र से भूमि की ओर बहती है।

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र स्थलीय समीर (land breeze) को दर्शाता है। रात के समय, जमीन पर हवा ठंडी होकर भारी हो जाती है, जिससे उच्च दबाव का क्षेत्र बनता है। पानी पर हवा अपेक्षाकृत गर्म रहती है और कम दबाव का क्षेत्र बनता है। परिणामस्वरूप, ठंडी स्थलीय हवा भूमि से समुद्र की ओर बहती है।

Question 1. Why do the breezes blow from the sea to the land during the day?
Answer: During the day as land gets heated up faster than water, an area of low pressure is created on land whereas there is a region of comparatively higher pressure on the sea. As a result the breezes blow from the sea to the land during the day.
In simple words: During the day, land heats faster than water, creating low pressure over land and high pressure over the sea, causing wind to blow from sea to land.

🎯 Exam Tip: The differential heating of land and water is the core concept behind sea and land breezes; explicitly mention temperature and pressure differences.

Question 2. When do the winds blow from the d to the sea?
Answer: The winds blow from land to the sea during the night.
In simple words: Winds blow from land to sea during the night because land cools faster than water, leading to higher pressure over land.

🎯 Exam Tip: Remember that land breezes occur at night, reversing the daytime sea breeze pattern due to cooling differences.

Question 3. Describe the winds shown in fig. (a).
Answer: It is sea breeze.
In simple words: Figure (a) illustrates a sea breeze, where cool air from the sea blows towards the warmer land during the day.

🎯 Exam Tip: Be able to identify sea breeze and land breeze diagrams correctly by observing the direction of wind flow relative to land and sea.

Question 4. Compare fig.(a) and (b) with reference fo temperature conditions, air pressure and winds.
Answer: In figure (a) the temperature is higher on land & the pressure is low so winds blow from sea to land. In figure (b) the temperature is low on the land & the pressure is high. Winds blow from land to sea.
In simple words: Figure (a) (sea breeze) shows high land temperature, low land pressure, and sea-to-land winds; Figure (b) (land breeze) shows low land temperature, high land pressure, and land-to-sea winds.

🎯 Exam Tip: A comparative analysis requires you to systematically highlight the differences in temperature, pressure, and wind direction for both phenomena.

Question 5. Which winds are called sea breezes and which are called land breezes? Why?
Answer: Winds in (a) are sea breeze because they blow from the sea and (b) are land breeze because they blow from the land.
In simple words: Sea breezes originate from the sea and blow towards the land, while land breezes originate from the land and blow towards the sea.

🎯 Exam Tip: The name of the breeze indicates its origin point, which is key to distinguishing between them.

Question 6. In which part of India are land and sea breezes experienced?
Answer: In India, it is experienced near the coastal areas.
In simple words: Land and sea breezes are localized wind patterns commonly experienced in coastal regions of India due to daily temperature contrasts.

🎯 Exam Tip: Remember that land and sea breezes are local phenomena, typically confined to narrow strips along coastlines.

Question 7. Do you experience sea and land breezes in your area?
Answer: The answer may vary.
In simple words: Whether one experiences sea and land breezes depends on their proximity to a coastline and local geographical conditions.

🎯 Exam Tip: For personal experience questions, relate the answer to geographical location; if living inland, the answer would be no, explaining why.

Give It A Try.

Write The Changed Directions Of The Wind In The Table Below:

Question 1. Pressure Belts Northern Hemisphere Southern Hemisphere Mid Latitudes ........... ........... Poles ........... ...........
Answer:

In simple words: The table shows how the Coriolis effect deflects prevailing winds in different pressure belts and hemispheres, impacting their direction of flow.

🎯 Exam Tip: Accurately mapping wind directions for different pressure belts in both hemispheres requires knowledge of the Coriolis effect and general atmospheric circulation patterns.

Try This:

Question 1. Observe the pictures given below and describe the valley breeze considering the elevation of land, the heating and cooling properties of land and water, the air pressure, etc.
Answer:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र घाटी समीर (valley breeze) को दर्शाता है। दिन के समय, सूर्य की रोशनी पहाड़ों की चोटी को तेजी से गर्म करती है, जिससे वहां की हवा गर्म होकर ऊपर उठती है और कम दबाव का क्षेत्र बनता है। घाटी में हवा अपेक्षाकृत ठंडी और भारी रहती है, जिससे उच्च दबाव होता है। नतीजतन, हवा घाटी से पहाड़ों की ओर बहती है। Characteristics of Valley Breeze:
• Valleys are cooler compared to mountain tops during the day.
• Mountains are comparatively warmer.
• Air pressure is greater in the valley.
• Winds blow from valley to the mountain tops.
• Hot and light air from the mountains descend downwards and cool air from valleys ascend upwards.
• Valley breeze are set after the sun rises.
In simple words: Valley breezes occur during the day when mountain slopes heat up faster, creating low pressure, and cool air from the valley floor rises to replace it.

🎯 Exam Tip: When describing valley breezes, focus on the daytime heating differences between valley floors and mountain slopes, leading to upward air movement.

Question 2. Read the following information carefully and draw a diagram for the mountain breeze accordingly. Characteristics of the Mountain breeze:
• Mountains cool down quickly at night.
• The valley zone is comparatively warmer.
• Air pressure is greater on the mountains.
• Winds blow from the mountain towards the valley.
• The hot and light air from the valley is pushed upwards and the cool air rushes down into the valley.
• Mountain winds set in after sunset.
Answer:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र पर्वतीय समीर (mountain breeze) को दर्शाता है। रात के समय, पहाड़ों की चोटी तेजी से ठंडी हो जाती है, जिससे वहां की हवा ठंडी होकर भारी होती है और उच्च दबाव का क्षेत्र बनता है। घाटी में हवा अपेक्षाकृत गर्म रहती है और कम दबाव का क्षेत्र बनता है। नतीजतन, ठंडी हवा पहाड़ों से घाटी की ओर नीचे की ओर बहती है।
In simple words: Mountain breezes occur at night when mountain slopes cool faster than valleys, causing cool, dense air to flow down into the valley.

🎯 Exam Tip: For mountain breezes, remember the nighttime cooling of mountain slopes, creating high pressure that drives air downwards into the warmer valley.

Try This:

• Fold a piece of paper into two same sized rolls.
• Keep both the paper rolls on one side of a table
• You & your friend should select one roll each.

Question 1. Without touching the roll of the paper on the table, what can be done to move the paper rolls to the other end of the table?
Answer: To move the paper rolls to the other end of the table without touching a person can
• Blow the air from his mouth towards the roll of paper
• Use a newspaper a book or a hand fan
• Tilt the table towards the other end.
In simple words: One can move the paper rolls without touching them by blowing air, fanning them, or tilting the table.

🎯 Exam Tip: This question tests understanding of air as a force; focus on methods that create air movement or leverage gravity.

Question 2. See who moves the paper roll first to the other end of the table:
Answer: The object which blows the air with maximum force, moves the paper roll first to the other end of the table.
In simple words: The paper roll subjected to the strongest air force or most effective tilt will move across the table fastest.

🎯 Exam Tip: The speed of movement is directly proportional to the force applied by the air or the gravitational pull from tilting the table.

Question 3. What could be the reason of the delay in making the rolls reach to the other end of the table?
Answer: There will be a delay in making the rolls reach the other end of the table if the air is blown with lesser force.
In simple words: Delays occur if the air blown is too weak, or if the table tilt is insufficient to overcome friction.

🎯 Exam Tip: A weaker force (less air or gentle tilt) results in slower movement due to insufficient kinetic energy being imparted to the rolls.

Question 4. What can we do to move the rolls to the other end of the table with a greater speed?
Answer: We mostly use the technique/object which will blow air with maximum force to move the rolls to the other end of the table with a greater speed.
In simple words: To increase the speed, apply more force, such as by blowing harder, using a stronger fan, or tilting the table more steeply.

🎯 Exam Tip: To achieve greater speed, one must apply a greater force, directly correlating to the principles of acceleration.

Question 5. Can a bottle filled with water be moved to the other end of the table in this manner? Can we use the same method that you tried for moving paper rolls?
Answer: A bottle filled with water cannot be moved to the other end of the table in this manner. We cannot use the same methods that we tried for moving paper rolls to move a bottle filled with water as it is heavier in weight, (we can if we tilt the table which was an option.)
In simple words: A water-filled bottle, being much heavier than paper rolls, generally cannot be moved by blowing air, though a strong enough tilt might work.

🎯 Exam Tip: This question highlights the role of mass and friction; heavier objects require significantly more force to move using the same methods.

Fill In The Blanks Choosing The Correct Option From The Bracket:

Question 1. Air moves from high pressure to low pressure areas in a _______ manner. (vertical, horizontal, parallel)
Answer: horizontal.
In simple words: Air moves across the Earth's surface from high to low pressure in a horizontal direction, creating wind.

🎯 Exam Tip: Wind is primarily defined as the horizontal movement of air, while vertical movement is associated with convection currents.

Question 2. Winds velocity is measured in the units of _______ . (knots, metres, seconds)
Answer: knots.
In simple words: The speed of wind is commonly measured in knots, a unit reflecting nautical miles per hour.

🎯 Exam Tip: Know the standard units of measurement for meteorological parameters; knots are specific to wind speed.

Question 3. Wind which cover a large portion of the earth are called _______ wind. (local, polar, planetary)
Answer: planetary.
In simple words: Planetary winds are large-scale, global winds that blow consistently over vast regions of the Earth's surface.

🎯 Exam Tip: Planetary winds are distinguished by their extensive coverage and consistent direction, unlike local or seasonal winds.

Question 4. Winds blowing between mid latitudinal high pressure belt and the equator are called _______. (westerlies, easterlies, polar)
Answer: easterlies.
In simple words: The trade winds, or easterlies, blow from the subtropical high-pressure belts towards the equatorial low-pressure zone.

🎯 Exam Tip: Remember that easterlies (trade winds) are the dominant winds in the tropical regions, moving towards the equator.

Question 5. Winds blowing between mid latitudinal high pressure belt and the sub polar low pressure belt are called _______. (easterlies, westerlies, polar)
Answer: westerlies.
In simple words: Westerlies are prevailing winds that blow from the mid-latitude high-pressure belts towards the subpolar low-pressure belts.

🎯 Exam Tip: Westerlies are characteristic of the mid-latitudes, blowing from west to east, and are important for temperate zone weather.

Question 6. Winds that blow for a short duration of time, over a limited area are called ____ wind. (polar, local, easterlies)
Answer: local.
In simple words: Local winds are short-lived and affect only a small area, unlike global wind patterns.

🎯 Exam Tip: Understanding the characteristics of local winds helps in differentiating them from planetary or seasonal winds, a common point of confusion.

Question 7. Mountain winds blow during ____ (morning, night, midday)
Answer: night.
In simple words: Mountain breezes typically occur at night as the mountain slopes cool down rapidly.

🎯 Exam Tip: Remember the diurnal cycle of heating and cooling to correctly identify when mountain and valley breezes occur.

Question 8. Winds that blow at night in coastal areas are called ____ breeze, (sea, land, valley)
Answer: land.
In simple words: At night, land cools faster than the sea, causing winds to blow from the land towards the sea, known as a land breeze.

🎯 Exam Tip: Distinguishing between land and sea breezes requires understanding the differential heating and cooling rates of land and water.

Question 9. Cyclones occurring in the western part of the Pacific ocean are called ____ (hurricane, typhoons)
Answer: typhoons.
In simple words: Tropical cyclones are called typhoons when they form in the western Pacific Ocean.

🎯 Exam Tip: Knowing the regional names for tropical cyclones (hurricanes, typhoons, cyclones) is important for geographical accuracy.

Question 10. Hot winds blowing in the Thar Desert are called the ____ (simoons, loo, chinook)
Answer: loo.
In simple words: Loo refers to the strong, hot, and dry summer winds blowing over the plains of North India, especially the Thar Desert.

🎯 Exam Tip: Memorize specific local winds and their associated regions, as this is a common factual question type.

Rewrite The Following Statements After Choosing The Correct Option:

Question 1. During an anticyclone the sky ____
(a) is dark.
(b) is cloudy.
(c) is clear.
Answer: (c) is clear.
In simple words: Anticyclones are associated with high pressure and sinking air, which prevents cloud formation, leading to clear skies.

🎯 Exam Tip: Remember that anticyclones bring stable, clear weather, while cyclones bring stormy conditions.

Question 2. Winds blowing from the polar high pressure to sub polar low pressure belt
(a) blow from west to east.
(b) blow from east to west.
(c) blow from south to north.
(d) blow from north to south.
Answer: (b) blow from east to west.
In simple words: Polar winds, also known as Polar Easterlies, originate from the polar high pressure belts and move westward due to the Coriolis effect.

🎯 Exam Tip: Grasping the direction of planetary winds relative to pressure belts and the Coriolis effect is key to understanding global circulation.

Question 3. The minimum velocity of cyclonic storms is ____
(a) 50 km per hour
(b) 60 km per hour
(c) 70 km per hour
(d) 80 km per hour.
Answer: (b) 60 km per hour
In simple words: For a storm to be classified as a cyclone, its wind speed must meet a certain minimum threshold, typically around 60 km per hour.

🎯 Exam Tip: Specific numerical values like minimum wind velocity for cyclones are often tested, so precise recall is beneficial.

Question 4. Winds which originate in specific regions and blow over a limited area are called ____
(a) local winds.
(b) seasonal winds
(c) monsoon winds
(d) planetary winds
Answer: (a) local winds.
In simple words: Local winds are small-scale wind systems that are confined to a specific geographical area, influenced by local topography and temperature differences.

🎯 Exam Tip: Differentiate between local, seasonal, and planetary winds based on their scale, duration, and origin.

Find Out The Odd Man Out And Give Reason For Your Answer:

Question 1. Polar winds, Local winds, Easterlies, Westerlies
Answer: Local winds - Others are names of planetary winds.
In simple words: Polar, Easterlies, and Westerlies are major global wind systems (planetary winds), while local winds are confined to smaller areas.

🎯 Exam Tip: Classifying winds into major categories like planetary, seasonal, and local is fundamental for such "odd one out" questions.

Question 2. Landbreeze, Valley winds, Westerlies, Mountain winds.
Answer: Westerlies - Others are names of local winds.
In simple words: Landbreeze, valley winds, and mountain winds are local wind phenomena, whereas Westerlies are part of the global wind circulation.

🎯 Exam Tip: Be precise in identifying local wind types (e.g., land/sea breeze, mountain/valley breeze) and distinguishing them from global winds.

Question 3. Mistral, Bora, Pampero, Foehn
Answer: Foehn - Others are cold and dry winds.
In simple words: Mistral, Bora, and Pampero are cold and dry winds, while Foehn is a warm, dry wind that descends down mountain slopes.

🎯 Exam Tip: For local winds, remember not just their names and regions but also their temperature characteristics (warm/cold).

Question 4. Loo, Foehn, Mistral, Simoon
Answer: Mistral - Others are hot and dry winds.
In simple words: Loo, Foehn, and Simoon are generally hot and dry winds, while Mistral is a cold, dry wind.

🎯 Exam Tip: A clear understanding of the temperature and moisture content of various local winds is essential for accurate categorization.

Question 5. Mistral, Bora, Chinook, Foehn
Answer: Chinook - Others originate in the Alps Mountain.
In simple words: Mistral, Bora, and Foehn are associated with European mountain ranges, while Chinook is a wind primarily found in the Rocky Mountains of North America.

🎯 Exam Tip: Linking specific local winds to their geographical origin (mountain range or region) is important for these types of questions.

Question 6. Southeast Asia, West Europe, East Africa, North Australia.
Answer: West Europe - Others receive monsoon rains.
In simple words: Southeast Asia, East Africa, and North Australia are regions significantly affected by monsoon rains, whereas West Europe experiences different climatic patterns.

🎯 Exam Tip: Identify regions characterized by monsoon climates to correctly answer questions about their geographical distribution.

Question 7. India, Japan, China, Phillippines.
Answer: India - Others experience typhoons.
In simple words: Japan, China, and the Philippines are frequently affected by typhoons (tropical cyclones in the western Pacific), while India experiences cyclones from the Bay of Bengal or Arabian Sea, not typically termed typhoons.

🎯 Exam Tip: Pay attention to the specific terminology for tropical cyclones used in different regions of the world.

Question 8. Furious Fifties, Screaming Seventies, Screeching Sixties,, Roaring Forties.
Answer: Screaming Seventies - Others are names of winds in the southern hemisphere.
In simple words: Roaring Forties, Furious Fifties, and Screeching Sixties are all terms for strong westerly winds in the Southern Hemisphere, while "Screaming Seventies" is not a commonly recognized term in meteorology for a specific wind belt, making it the odd one out. (Note: The prompt had a double comma, assuming "Screaming Seventies" as the outlier).

🎯 Exam Tip: Familiarize yourself with the common names and latitudes associated with the strong westerly winds of the Southern Hemisphere.

Place A Tick Mark (√) Against The Correct Option:

Question 1. Towards which direction do the southern hemisphere winds get deflected? .
(a) Towards the left.
(b) Towards the right.
(c) Towards the centre.
Answer: (a) Towards the left.
In simple words: The Coriolis effect deflects winds to the left in the Southern Hemisphere and to the right in the Northern Hemisphere.

🎯 Exam Tip: The Coriolis effect and its directional influence on winds in different hemispheres is a fundamental concept often tested.

Question 2. What are the winds blowing between polar high pressure belt and subpolar low pressure belt called?
(a) Monsoon winds
(b) Polar winds
(c) Westerlies winds
Answer: (a) Monsoon winds
In simple words: The winds blowing from polar high-pressure belts to subpolar low-pressure belts are primarily known as Polar Easterlies. (Correction: The provided answer (a) Monsoon winds is incorrect based on typical geographical understanding. The winds blowing between polar high and subpolar low pressure belts are Polar Easterlies. If the options are fixed, I'll stick to the provided one, but add a note to the explanation.) **Given the options and likely intent for primary planetary winds, if Polar Easterlies isn't an option, and Monsoon winds are not correct here, it seems there's an error in the original provided answer. However, I must adhere to the provided solution, even if meteorologically debatable.** Let's assume the question refers to a broader context or there's a specific curriculum interpretation that leads to 'Monsoon winds' being the intended answer, even though Polar Easterlies is the standard answer for that specific belt. Re-evaluating based on content: This question is in a section about "Place a tick mark (√) against the correct option". Options are (a) Monsoon winds (b) Polar winds (c) Westerlies winds. The winds blowing between polar high pressure belt and subpolar low pressure belt are indeed Polar Easterlies, which are a type of Polar winds. So (b) Polar winds would be the more appropriate general category if "Polar Easterlies" is not an option. If (a) Monsoon winds is selected, there must be a very specific interpretation not immediately obvious. I will follow the provided answer as it is, but ensure the simple explanation clarifies the common understanding. Wait, the provided answer says (a) Monsoon winds. This is meteorologically incorrect for the described wind belt. However, my instruction is to extract verbatim and follow the provided answers. I will put the provided answer, but my simple words will reflect the correct scientific understanding if it helps the student, without explicitly stating the given answer is wrong. Let me re-read the rules carefully: "Extract every word exactly as written." "Answer line formatting:
Answer: [Text]". For MCQs, "
Answer: (x) Full option text". "Simple explanation rule: ... [Explain the core idea clearly in 1-3 highly simplified sentences for students.]". I should explain based on the *correct* concept, even if the provided answer is flawed. No, "Extract every word exactly as written" implies I should copy the provided answer including the option letter. My simple words should explain the *concept* that the question *intended* to ask about, or at least the *concept* of the selected answer, without correcting the original source. This is a difficult case. Let me adjust my interpretation for the simple words: I will explain the *concept* implied by the *question* (winds between polar high and subpolar low pressure belt) and also reflect the *answer chosen*, if possible, or explain why it's a confusing choice. Given the options, (b) Polar winds is the most general correct answer for the described belt. (a) Monsoon winds is incorrect for this belt. Since the original OCR *provides* `Answer: (a) Monsoon winds`, I *must* output that. My "simple words" explanation should attempt to rationalize *that answer* within the context, or stick to a general explanation of the *question's subject*. Let's try: "The winds blowing between polar high pressure and subpolar low pressure belts are generally known as Polar Easterlies, which are a type of polar winds. Monsoon winds are seasonal winds related to differential heating of land and sea." This would highlight the discrepancy. Alternatively: "The question asks about winds between the polar high pressure belt and the subpolar low pressure belt. Monsoon winds are seasonal winds that bring rain, typically over continents like India, due to differential heating of land and sea." This explains the chosen option without affirming it's correct for the described belt. This is probably the safest. I will follow this strategy for all potentially flawed answers: extract the given answer verbatim and provide a "simple words" explanation that clarifies the *concept* of the answer provided, or the subject of the question. Okay, let's process this one carefully. The question is about winds between polar high pressure belt and subpolar low pressure belt. These are Polar Easterlies. The provided answer is `(a) Monsoon winds`. This is incorrect. My rule says: "Extract every word exactly as written." and "Answer: (x) Full option text". And "Simple explanation rule: Immediately before closing the main question

tag block framework, append exactly:
In simple words: [Explain the core idea clearly in 1-3 highly simplified sentences for students.]" I cannot explain 'monsoon winds' as the core idea of 'winds between polar high and subpolar low pressure belt'. This would be misleading. I must explain the *core idea* of the *question*. Let's try: `Question 2. What are the winds blowing between polar high pressure belt and subpolar low pressure belt called?
(a) Monsoon winds
(b) Polar winds
(c) Westerlies winds
Answer: (a) Monsoon winds
In simple words: Winds blowing from the polar high pressure belt towards the subpolar low pressure belt are typically known as Polar Easterlies, which are a type of polar wind. Monsoon winds are seasonal winds that occur due to the differential heating of land and sea.

` This explanation addresses the question correctly AND acknowledges the provided answer choice's definition, even if it's not the correct answer for the question's premise. This seems like a good balance. **Continuing from Question 2, page 18:**

Question 2. What are the winds blowing between polar high pressure belt and subpolar low pressure belt called?
(a) Monsoon winds
(b) Polar winds
(c) Westerlies winds
Answer: (a) Monsoon winds
In simple words: Winds blowing from the polar high pressure belt towards the subpolar low pressure belt are typically known as Polar Easterlies. Monsoon winds are seasonal winds that occur due to the differential heating of land and sea.

🎯 Exam Tip: Understanding the characteristics and locations of planetary wind belts (Easterlies, Westerlies, Polar winds) is crucial for geography exams.

Question 3. Hot and destructive winds blowing in the Sahara
(a) Chinook
(b) Simoom
(c) Loo
Answer: (b) Simoom
In simple words: Simoom is a strong, dry, dust-laden wind that blows in the deserts of Africa and the Middle East, including the Sahara, causing heatstroke.

🎯 Exam Tip: Relate specific local winds to their regions and characteristic features (hot, cold, dusty, rainy) for better recall.

Question 4. Cold winds around the Mediterranean.
(a) Foehn
(b) Pampero
(c) Mistral
Answer: (b) Pampero
In simple words: Pampero is a cold, violent southwesterly wind that sweeps over the pampas of Argentina, but in the context of options for Mediterranean, it is usually Mistral. (Correction: Mistral is a cold wind affecting the Mediterranean coast of France, not Pampero. However, I must follow the provided answer.) **Again, an incorrect provided answer, I will follow the strategy.** Pampero is a cold wind in Argentina. Mistral is a cold wind in Mediterranean France. I will put the provided answer as (b) Pampero, and my simple words will define Pampero, and if needed, hint at other winds typically found there. `**Question 4. Cold winds around the Mediterranean.**
(a) Foehn
(b) Pampero
(c) Mistral
Answer: (b) Pampero
In simple words: Pampero is a strong, cold wind that sweeps across the pampas of Argentina. While Mistral is a known cold wind in the Mediterranean region, the provided answer for this question is Pampero.

🎯 Exam Tip: Accurately identifying the geographical location of various local winds and their temperature characteristics is vital for such questions.

**Page 19**

Question 5. How is cyclonic condition created?
(a) Low pressure area is surrounded by high pressure.
(b) A high pressure area is surrounded by low pressure.
(c) A low pressure area is surrounded by mid pressure.
Answer: (c) A low pressure area is surrounded by mid pressure.
In simple words: Cyclonic conditions typically form when a low-pressure center is encircled by higher pressure, causing winds to spiral inwards. (Note: Option (c) "mid pressure" is less precise than "high pressure" but if this is the chosen answer, it implies a pressure gradient from mid to low.)

🎯 Exam Tip: The core principle of cyclone formation involves a central low-pressure area attracting winds from surrounding higher-pressure zones.

Identify The Type Of Winds From The Description Given Below:

Question 1. In coastal areas, land cools down faster as compared to the sea, the air blows from land to sea.
Answer: Land Breeze.
In simple words: A land breeze occurs at night when cooler air from the land, which has cooled faster than the sea, blows towards the warmer sea.

🎯 Exam Tip: Differentiate land breeze from sea breeze by remembering that land cools faster than water at night, driving the wind direction.

Question 2. In the Indian subcontinent, dry winds blow from the Indian Subcontinent towards the equator.
Answer: North-East monsoon winds.
In simple words: North-East monsoon winds are seasonal dry winds that blow from the landmass of the Indian subcontinent towards the equator during the winter months.

🎯 Exam Tip: Understand the characteristics (dry/moist) and direction of monsoon winds in both summer and winter seasons.

Question 3. The winds blowing over the earth's surface throughout the year and covering a large portion of the earth.
Answer: Planetary winds.
In simple words: Planetary winds are global wind systems that blow consistently throughout the year, influencing large-scale atmospheric circulation.

🎯 Exam Tip: Recognize planetary winds as the overarching global wind patterns, distinct from seasonal or local winds.

Question 4. The winds that blow for a short duration of time, originate in specific regions & blow over a limited area.
Answer: Local winds.
In simple words: Local winds are regional winds caused by localized temperature and pressure differences, affecting smaller geographic areas for shorter periods.

🎯 Exam Tip: The key identifiers for local winds are their limited area of effect and shorter duration compared to larger wind systems.

Match The Pairs Correctly:

**Page 20**

Question 1. Name of the Wind (1) Loo (2) Simoom (3) Chinook (4) Mistral Nature of the Wind (a) Hot and dry (b) Cold and dry (c) Hot, dry and destructive (d) Warm and dry
Answer:
1-a
2-c
3-d
4-b
In simple words: This match identifies local winds with their primary characteristics: Loo is hot and dry, Simoom is hot, dry and destructive, Chinook is warm and dry, and Mistral is cold and dry.

🎯 Exam Tip: For matching questions, create a mental table of local winds and their associated properties (e.g., temperature, moisture, effect) for quick recall.

Define The Following Terms:

Question 1. Roaring Forties:
Answer: Beyond 40°S winds blow with tremendous velocity. These winds are called the Roaring Forties.
In simple words: The Roaring Forties are powerful westerly winds found in the Southern Hemisphere, blowing between 40°S and 50°S latitude, known for their strong and consistent speeds.

🎯 Exam Tip: Associate these terms with their specific latitude bands in the Southern Hemisphere and their characteristic strength.

Question 2. Furious Fifties:
Answer: Around 50°S winds are stormy hence they are called the Furious Fifties.
In simple words: The Furious Fifties are extremely strong and stormy westerly winds occurring between 50°S and 60°S latitude in the Southern Hemisphere.

🎯 Exam Tip: Remember the increasing intensity of westerly winds as one moves poleward in the Southern Hemisphere (Roaring Forties, Furious Fifties, Screeching Sixties).

Question 3. Screeching Sixties:
Answer: The stormy winds around 60°S make tremendous noise and hence they are called the Screeching Sixties.
In simple words: The Screeching Sixties refer to the fiercest and loudest westerly winds found near 60°S latitude, characterized by their immense power and noise.

🎯 Exam Tip: These colorful names help describe the increasing velocity and audibility of the westerlies in the southern oceanic latitudes.

**Page 21**

Question 4. Local Winds:
Answer: The winds that blow for a short duration of time, originate in specific region and blow over a limited area are called Local Winds.
In simple words: Local winds are small-scale wind systems, influenced by localized temperature and pressure variations, that affect a restricted area for a brief period.

🎯 Exam Tip: Clearly define local winds by their spatial and temporal characteristics, contrasting them with global wind patterns.

Question 5. Doldrums:
Answer: The region up to 5° North and 5° South of the equator remains calm for most of the year and winds do not blow in this region. It is called the equatorial calm zone or Doldrums.
In simple words: The Doldrums are a calm, low-pressure zone near the equator (approximately 5°N to 5°S) where winds are very light or absent, often causing sailing delays.

🎯 Exam Tip: Associate Doldrums with the Intertropical Convergence Zone (ITCZ), characterized by low pressure and calm conditions.

Question 6. Horse Latitudes:
Answer: In the area near the Tropic of Cancer and Tropic of Capricorn, that is between 25° and 35° north and south, there exist a high pressure belt, which is a calm belt. This belt is called as the Horse latitudes.
In simple words: Horse Latitudes are subtropical high-pressure zones (around 25°-35° N and S) where winds are generally light and calm, historically making sailing difficult.

🎯 Exam Tip: Remember Horse Latitudes are high-pressure, calm belts located in the subtropics, distinct from the equatorial Doldrums.

Question 7. Typhoons:
Answer: Storms arising in the months between June and October in the western part of the Pacific Ocean which blow with high velocity winds and heavy rains causing destruction are called Typhoons.
In simple words: Typhoons are powerful tropical cyclones that form in the western Pacific Ocean, typically between June and October, bringing strong winds and heavy rainfall.

🎯 Exam Tip: Understand that typhoons are regional names for tropical cyclones, characterized by their origin in the western Pacific and destructive nature.

Question 8. Hurricanes:
Answer: The cyclones in the Caribbean sea which are destructive in nature are called Hurricanes.
In simple words: Hurricanes are severe tropical cyclones that originate over the Atlantic Ocean or Caribbean Sea, known for their powerful winds and potential for widespread damage.

🎯 Exam Tip: Distinguish hurricanes from typhoons based on their geographical areas of formation (Atlantic/Caribbean vs. Western Pacific).

Observe The Pictures Given Below Of Seasonal Winds And Write Its Characteristics:

**Page 22**

Question 1.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र मानसून हवाओं को दर्शाता है। बाईं ओर का आरेख ग्रीष्मकालीन मानसून को दिखाता है जहाँ हवाएँ दक्षिण-पश्चिम से समुद्र से ज़मीन की ओर कम दबाव वाले क्षेत्र में बहती हैं। दाईं ओर का आरेख शीतकालीन (पीछे हटते) मानसून को दिखाता है जहाँ हवाएँ उत्तर-पूर्व से ज़मीन से समुद्र की ओर उच्च दबाव वाले क्षेत्र से बहती हैं। यह भारतीय उपमहाद्वीप पर हवा के दबाव और तापमान के मौसमी बदलाव को स्पष्ट करता है।
Answer: Characteristics of the Seasonal winds (Monsoon):
• Monsoon winds are generated due to the uneven heating of land and water in the different seasons.
• During summer, monsoon winds blow from the sea to the land and in winter they blow from the land to the sea.
• Southern Asia, East Africa, North Australia are the regions where the pronounced effects of these winds are felt.
• The influence of monsoon winds is seen in the summer and winter seasons in the Indian subcontinent.
In simple words: Monsoon winds are seasonal winds driven by the difference in heating between land and water, leading to a reversal of wind direction between summer and winter and bringing significant rainfall to regions like the Indian subcontinent.

🎯 Exam Tip: Focus on the cause (differential heating), direction reversal, and regional impact as key characteristics of monsoon winds.

**Page 23**

change in direction of wind:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र पृथ्वी के घूमने के कारण हवा की मूल दिशा में परिवर्तन को दर्शाता है। इसमें दिखाया गया है कि उच्च दबाव से कम दबाव की ओर बहने वाली हवाएँ उत्तरी गोलार्ध में दाईं ओर और दक्षिणी गोलार्ध में बाईं ओर विक्षेपित होती हैं, जिससे हवा की दिशा बदल जाती है।
In simple words: This diagram illustrates how the Earth's rotation, through the Coriolis effect, deflects winds from their original straight path, causing them to curve right in the Northern Hemisphere and left in the Southern Hemisphere.

🎯 Exam Tip: Understand that the Coriolis effect, a result of Earth's rotation, is the primary reason for the deflection of winds and ocean currents.

Draw A Neat Labelled Diagram:

Question 1. Planetary winds and pressure belts on the earth

**Page 24**

ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख पृथ्वी पर प्रमुख ग्रहीय पवनें और दबाव पेटियों को दर्शाता है। इसमें भूमध्यरेखीय निम्न दबाव पेटी, उपोष्णकटिबंधीय उच्च दबाव पेटी (हॉर्स अक्षांश), उपध्रुवीय निम्न दबाव पेटी और ध्रुवीय उच्च दबाव पेटी को दिखाया गया है, साथ ही ईस्टरली, वेस्टरली और ध्रुवीय पवनों की दिशाओं को भी दर्शाया गया है।
Answer: [Diagram showing Planetary winds and pressure belts on the earth]
In simple words: This diagram illustrates the Earth's global atmospheric circulation, showing the major pressure belts (equatorial low, subtropical high, subpolar low, polar high) and the corresponding planetary wind systems (Easterlies, Westerlies, Polar winds) that blow between them.

🎯 Exam Tip: A well-labeled diagram of planetary winds and pressure belts is crucial for visualizing global atmospheric circulation and understanding climate zones.

Distinguish Between The Following:

Question 1. Easterlies and Westerlies:
Answer:

In simple words: Easterlies are global winds blowing from subtropical highs towards the equator, generally from east to west, while Westerlies blow from subtropical highs towards the poles, generally from west to east.

🎯 Exam Tip: Clearly differentiate Easterlies and Westerlies by their pressure belts of origin, destination, and general directional flow in both hemispheres.

**Page 25**

Question 2. Valley breeze and Mountain breeze:
Answer:

In simple words: Valley breezes occur during the day with air rising from the valley to the heated mountain slopes, while mountain breezes occur at night with cool, dense air flowing down from the mountains into the valley.

🎯 Exam Tip: Understand that mountain and valley breezes are driven by the differential heating and cooling of mountain slopes and valleys over a 24-hour cycle.

Question 3. Cyclones and Anticyclones:
Answer:

In simple words: Cyclones are low-pressure systems with inward spiraling winds, bringing stormy, cloudy, and rainy weather, while anticyclones are high-pressure systems with outward spiraling winds, resulting in clear, pleasant weather.

🎯 Exam Tip: Distinguishing cyclones and anticyclones requires knowing their pressure centers, wind directions (Coriolis effect), and associated weather conditions.

State One Reason Why:

**Page 26**

Question 1. Planetary winds change their original direction.
Answer: The rotation from the west to east causes the change in the original direction of the planetary winds.
In simple words: Planetary winds change direction due to the Coriolis effect, which is caused by the Earth's rotation from west to east, deflecting moving objects like winds.

🎯 Exam Tip: The Coriolis effect is the fundamental reason for the deflection of all large-scale winds and ocean currents on Earth.

Question 2. The air pressure in land and water is different
Answer:
(a) The land is made up of dense matter. Land is stable and opaque. As a result, heat is transferred at a greater speed and in a higher proportion. Hence, land gets heated quickly.
(b) The density of water is comparatively less. Water is transparent and unstable. Hence, water does not get heated quickly.
(c) As a result, the air pressure in land and water areas is different.
In simple words: Land heats up and cools down faster than water due to their different specific heat capacities and transparency, leading to distinct temperature and thus air pressure differences between land and water bodies.

🎯 Exam Tip: The differential heating and cooling of land and water is a key concept explaining phenomena like land/sea breezes and monsoons.

Question 3. The Indian subcontinent experiences monsoon and retreating monsoon seasons.
Answer:
(a) Monsoon winds are generated due to uneven heating of land & water in different seasons. During summers, monsoon winds blow from sea to land & in winter they blow from land to the sea.
(b) The influence of monsoon winds is seen in summer season in the Indian subcontinent due to high temperature & low pressure in Thar desert region & Punjab plains.
(c) As these winds blow from sea to land the Indian subcontinent experiences monsoon (rainy) season.
(d) During winters, due to high pressure & low temperature in the Indian subcontinent & comparatively low pressure & high temperature in the Indian ocean winds blow from land to sea.
(e) This is the retreating monsoon season in the Indian subcontinent.
Thus the Indian subcontinent experiences monsoon & retreating monsoon season.
In simple words: The Indian subcontinent experiences both monsoon and retreating monsoon seasons because of the distinct seasonal temperature and pressure differences between its landmass and the surrounding ocean, leading to a complete reversal of wind direction.

🎯 Exam Tip: Focus on the annual cycle of land-sea temperature and pressure differences to understand the onset and retreat of monsoon winds in India.

**Page 27**

Answer The Following In Detail:

Question 1. Give detailed information about the types of planetary winds.
Answer: The following are the types of Planetary winds:
(i) Easterlies:
• In both the hemispheres, the winds that blow from the high pressure area between 25° & 35° parallels, to the equatorial low pressure belt (between 5°N & 5°S parallel) are called Easterlies.
• In the northern hemisphere they blow from northeast to southwest whereas in the southern hemisphere they blow from southeast to northwest.
(ii) Westerlies:
• In both the hemispheres, winds that blow from the mid-latitudinal high pressure belt to sub polar low pressure belt situated near 60° parallel are called westerlies.
• In the northern hemisphere, these winds blow from the southwest to the northeast & in the southern hemisphere, they blow from the northwest to the southeast.
(iii) Polar winds:
• In both the hemispheres, winds blowing from the polar high pressure belt to the sub polar low pressure belt (55° to 65°) are called polar winds.
• Generally they blow from east to west.
In simple words: Planetary winds are global wind systems that blow consistently throughout the year, including Easterlies (from subtropics to equator), Westerlies (from subtropics to poles), and Polar winds (from poles to subpolar low pressure belts).

🎯 Exam Tip: For detailed answers, clearly describe each type of planetary wind by its origin (pressure belt), destination, and general direction in both hemispheres.

Question 2. Write in detail about cyclonic storms.
Answer:
(i) Cyclones occurring in the western part of the Pacific ocean along the coasts of Japan, China, Philippines, etc. are known as 'Typhoons'.
(ii) These storms arise in the months between June & October.
(iii) Due to high velocity winds & heavy rains, these prove to be destructive.
In simple words: Cyclonic storms are intense low-pressure systems that bring strong winds, heavy rain, and can cause widespread destruction, often receiving regional names like 'Typhoons' in the Western Pacific.

🎯 Exam Tip: When describing cyclonic storms, include their origin, intensity, associated weather, and regional variations in terminology.

**Page 28**

(iv) The cyclones in the Caribbean Sea are known as 'hurricanes'. These are also destructive in nature.
(v) During these storms, the minimum velocity of the wind is 60 km per hour.
(vi) Cyclones also originate in the temperate zone but they are not so powerful & hence are not destructive.
In simple words: Cyclonic storms are intense low-pressure systems that bring strong winds, heavy rain, and can cause widespread destruction, often receiving regional names like 'Typhoons' in the Western Pacific and 'Hurricanes' in the Caribbean Sea. Their intensity varies, with tropical cyclones being more destructive than temperate ones.

🎯 Exam Tip: For comprehensive answers, include details about the types of cyclones, their typical season, wind velocity, and destructive potential, along with regional names.

Question 3. What are anticyclones?
Answer:
(i) Under specific atmospheric conditions, the air pressure in a particular region increases & the pressure in the surrounding areas remain low.
(ii) In this situation, winds blow from the centre towards the surrounding areas in a circular manner.
(iii) In the northern hemisphere, these winds blow in a clockwise direction whereas in the southern hemisphere they blow in an anticlockwise direction.
(iv) During anticyclone, the skies are clear, winds blow with lesser velocities and the weather is pleasant.
In simple words: Anticyclones are high-pressure weather systems where air sinks and flows outward, rotating clockwise in the Northern Hemisphere and counter-clockwise in the Southern Hemisphere, leading to clear skies, calm winds, and pleasant weather.

🎯 Exam Tip: When defining anticyclones, highlight the central high pressure, outward wind flow, rotational direction (due to Coriolis effect), and associated fair weather conditions.

Can You Tell?

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र पृथ्वी के वैश्विक वायुदाब पेटियों (विषुवतीय निम्न, मध्य-अक्षांशीय उच्च, उपध्रुवीय निम्न, ध्रुवीय उच्च) और दोनों गोलार्धों में प्रचलित ग्रहीय पवनों (पूर्वा पवनें, पछुआ पवनें, ध्रुवीय पवनें) को उनके सामान्य दिशाओं और संबंधित अक्षांशों (जैसे 0°, 5°, 25°, 35°, 55°, 65°, 80°, 90°) के साथ दर्शाता है। यह दर्शाता है कि हवाएं उच्च दबाव से निम्न दबाव क्षेत्रों की ओर कैसे चलती हैं और पृथ्वी के घूर्णन के कारण कैसे विक्षेपित होती हैं।

Question 1. Which are the winds in the northern hemisphere that blow from the mid latitudinal high pressure belt to the equatorial low pressure belt?
Answer: Easterlies blow from mid latitudinal high pressure belt to equatorial low pressure belt in the northern hemisphere
In simple words: These winds are called Easterlies, and they move from the warmer mid-latitude regions towards the equator in the Northern Hemisphere.

🎯 Exam Tip: Understanding the location and direction of Easterlies in the Northern Hemisphere is key for explaining global wind patterns.

Question 2. What is the direction of the Westerlies in the southern hemisphere?
Answer: Westerlies blow from north west to south east in the southern hemisphere
In simple words: In the Southern Hemisphere, Westerlies travel from the northwest towards the southeast.

🎯 Exam Tip: Remember that the Coriolis effect causes wind deflection, influencing the specific direction of Westerlies in each hemisphere.

Question 3. Which planetary winds blow from the mid-latitudinal high pressure belts to the subpolar low pressure belts in the northern hemisphere?
Answer: The Westerlies blow from mid latitudinal high pressure belts to subpolar low pressure belts in the northern hemisphere
In simple words: The winds blowing from the mid-latitudinal high pressure belts to the subpolar low pressure belts in the Northern Hemisphere are the Westerlies.

🎯 Exam Tip: Distinguishing between different planetary winds based on their origin, destination, and hemisphere is crucial for scoring well.

Question 4. Why is the direction of polar winds not the same in both the hemispheres?
Answer: The rotation of the earth causes the change in the direction of winds in both the hemisphere. So polar winds blow from northeast to south west in the northern hemisphere & from south east to north-west in the southern hemisphere.
In simple words: The Earth's rotation, through the Coriolis effect, deflects polar winds differently in each hemisphere, causing them to blow from northeast to southwest in the Northern Hemisphere and southeast to northwest in the Southern Hemisphere.

🎯 Exam Tip: The Coriolis effect is a fundamental concept in understanding global wind patterns; ensure you grasp its impact on wind direction in both hemispheres.

Question 5. Name the winds that blow in the southern hemisphere.
Answer: Easterlies, Westerlies and Polar Winds blow in the southern hemisphere.
In simple words: The main winds in the Southern Hemisphere are Easterlies, Westerlies, and Polar Winds.

🎯 Exam Tip: Being able to list the major planetary wind systems by hemisphere demonstrates a comprehensive understanding of global atmospheric circulation.

Question 6. In which direction do the Easterlies blow in the Northern and Southern hemisphere?
Answer: Easterlies blow from northeast to southeast in northern hemisphere & from southeast to northwest in the southern hemisphere.
In simple words: In the Northern Hemisphere, Easterlies blow from northeast to southeast, while in the Southern Hemisphere, they blow from southeast to northwest.

🎯 Exam Tip: Accurately stating the direction of Easterlies in both hemispheres, as influenced by the Coriolis effect, is essential.