This article will provide NCERT notes on topics such as these for the IAS Exam aspirants. The latter are the focus of discussion in this section. Wind always moves from high pressure areas to low pressure areas.Q2. Ans. Only 1b. The smaller scale weather systems – mid-latitude depressions, or tropical convective cells … Only 2c. Sci. Only 2c. Global atmospheric circulation - Polar, Ferrel and Hadley cells. Which of the following is/are about “Fronts”?1. Atmosphere MCQ is important for exams like IBPS, SCC, UPSC, NEET etc. (a) the Equatorial forest (b) the Himalayas  (c) the Siberian Plain  (d) the Deccan Plateau, Related: Subtropical High, Subpolar Low, Easterlies, Westerlies | Pressure Belts of World. If the warm air mass moves towards the cold air mass, the contact zone is a cold front.2. latitudinal variation of atmospheric heating (from equator to poles), emergence of pressure belts (HP and LP system), the migration of belts following the path of the sun (warm temperature cause air to rise), the distribution of continents and oceans (land heats faster than water). This pressure belts is not permanent in nature, it oscillate with the movement of the sun. 1. (ii) While the pressure gradient force is from north to south, i.e. This movement of air is called global atmospheric circulation. Pattern of movement of planetary winds and local winds is called general circulation of atmosphere.Select the correct answer from the following codesa. They derive their energy through the evaporation of water from the ocean surface, which ultimately re-condenses into clouds and rain when moist air rises and cools to saturation. This causes accumulation of air at about 30o N and S. Part of the accumulated air sinks to the ground and forms a subtropical high. The rotation of earth3. Only 2 and 3d. Frictional Force – It affects the speed of the wind. As a result, equator is a low pressure zone. 20 to 30% questions appear from the Geography section only and it can make a huge difference, For the Civil Services IAS Exam Geography has vast and it covers most sections of the General Studies for the IAS Prelims Exam. Ans. It contains life-giving gases like Oxygen for humans and animals and carbon dioxide for plants. The corresponding anomalous sinking branch lies over the eastern Amazon basin and western deep tropical Atlantic (i.e., 5°S–15°N, 35°–65°W). This results in variations in the atmospheric pressure. They bring abrupt changes in temperature.Select the correct answer from the following codesa. Only 1b. The easterlies from either side of the equator converge in the Inter Tropical Convergence Zone (ITCZ).Q9. Only 1b. Warm air of tropical desertc. General Circulation of the atmosphere is one of many concepts for UPSC Geography that candidates must familiarize themselves with. It raises upto 14km in troposphere and reaches land surfaces near equator as Easterlies.3. The rate of change of pressure with respect to distance is the pressure gradient. Factors affecting the speed and direction of wind are:-. Only 1 and 2c. Air in horizontal motion is wind. In contrast to the Hadley, Ferrel and polar circulations that run along north-south lines, the Walker circulation is an east-west circulation. A pilot enters the weather service office and wants to know what time of the day she can expect to encounter the least turbulent winds at 760 m above central Kansas. Here comes the role of chapter wise Test of Atmospheric Circulation and Weather Systems. They cover a larger area and can originate over the land and sea. It is zone of convergence of easterlies from either side of the equator.Select the correct answer from the following codesa. Neither 1 nor 2 Answer: bExplanation: Frictional force affects the speed of the wind. Consider the following statements 1. (Remember that it just appears to deflect to the right because the ground beneath it moves.) It goes up to a height of 14 km from the surface of the earth. The atmosphere is a mixture of different gases. Figure C. Walker Circulation. Topics relevant for CSE Prelims in following books are covered in crack IAS Prelims Booklets of World Geography, Indian Geography, Geography Theory and Environment related portions. a) 1 only b) 2, 4 and 5 only c) 2 and 4 only d) 3 and 5 only Both 1 and 2d. The air is a mixture of several gases and it encompasses the earth from all sides. With reference to Inter Tropical Convergence Zone (ITCZ), which of the following is/are true?1. The adjective thermohaline derives from thermo-referring to temperature and -haline referring to salt content, factors which together determine the density of sea water. Thus, pressure gradient from sea to land is created and the wind blows from the sea to the land as sea breeze. The air surrounding the earth is called the atmosphere. Both 1 and 2d. Which of the following is/are true about Extra tropical cyclones?1. ... Clear frontal system is visible in tropical cyclones. Thunderstorms occur over short area and are violent.3. Subtropical High, Subpolar Low, Easterlies, Westerlies | Pressure Belts of World, Industrial Regions of North America – USA and Canada, Migration| Types, Causes & Consequences – Chapter 2 Class 12 NCERT Geography, Population | Distribution, Density, Growth & Composition – Chapter 1 Class 12 NCERT Geography, Everything on Ramsar Convention – Wetlands in India | UPSC, IAS, CDS, NDA, SSC CGL, Types of Forests in India – Evergreen, Deciduous, Thorny, Montane, Littoral Swamp | UPSC, IAS, CDS, NDA, Biodiversity and Conservation – Chapter 16 Class 11 Geography NCERT Solutions. (iii) The direction of wind around a low pressure in northern hemisphere is: (a) clockwise (b) perpendicular to isobars (c) anti-clock wise (d) parallel to isobars. In which part of the tropical cyclone do torrential rains and high velocity winds blow and why? Over the sea surface the friction is minimal. Only 2 and 3d. The atmosphere is essential for the survival of plant and animal life. (i) Discuss the factors affecting the speed and direction of wind. and moves towards the poles. They are characterised by steep gradient in temperature and pressure.3. Thunderstorms are caused by intense convection on moist hot days. Atmosphere is the air surrounding the earth. It is low pressure zone where winds from tropics converge.2. The higher the pressure gradient force, the more is the velocity of the wind and the larger is the deflection in the direction of wind.Q5. Another reason for sinking is the cooling of air when it reaches 30o N and S latitudes. Clear frontal system is visible in tropical cyclones.2. They also require the optimum temperature to keep themselves warm and grow. Ans. Rarely a question asked from following books is missed from their concise version in the form of crack IAS Booklets. Only 1b. This force is called the Coriolis force. Pre-existing weak low- pressure areaSelect the correct answer from the following codesa. Coriolis forces is maximum at the poles and is zero or absent at the equator. 8) The movement of air across the planet occurs in a specific pattern. When tropical cyclones reach latitudes near 30 degrees North, they often move northeast. atmospheric circulation, the turbulent pattern of wind, the formation of air masses, the disturbed weather when air masses interact with each other and the phenomenon of violent tropical storms. Powered by WordPress. It is greatest at the surface and its influence generally extends up to an elevation of 1 – 3 km. Only 1 and 2c. 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