(iv) Which one of the following is the source region for the formation of air masses? Only 1b. Page-1 section-2 Only 2c. They are characterised by steep gradient in temperature and pressure.3. We all know that earth is a unique planet due to the presence of life. On average, this circulation corresponds to large-scale wind systems arranged in several east–west belts that encircle the Earth. It is greatest at the surface and its influence generally extends up to an elevation of 1 – 3 km. The land loses heat faster and is cooler than the sea. Only 2c. They move from west to east.2. The extra tropical cyclones move from west to east but tropical cyclones, move from east to west.Q14. Which of the following is/are favourable conditions for the formation of tropical cyclones?1. Warm air of tropical desertc. 3. Only 1b. Consider the following statements 1. Over the sea frictional force is minimum.Select the correct answer from the following codesa. Environ. This Pattern of movement of planetary winds is called General circulation of atmosphere. The Pacific/North American Pattern, or PNA, describes the variation of atmospheric circulation patterns over the Pacific Ocean and North America. Tropical cyclones, move from east to west.Q13. It reaches the top of the troposphere up to an altitude of 14 km. The pressure gradient at nigh is from the land to the sea and the wind blows from the land to the sea as land breeze. 8) Atmospheric Pressure is measured by an instrument called ‘barometer’. It is low pressure zone where winds from tropics converge.2. The fronts occur in middle latitudes and are characterised by steep gradient in temperature and pressure. It raises upto 14km in troposphere and reaches land surfaces near equator as Easterlies.3. Along 30° N and 30° S exists high-pressure areas known as the subtropical highs. The rotation of earth3. Figure C. Walker Circulation. Air in horizontal motion is wind. Pattern of movement of planetary winds and local winds is called general circulation of atmosphere.Select the correct answer from the following codesa. The differences in atmospheric pressure causes the movement of air from high pressure to low pressure, setting the air in motion. Extra tropical cyclones originate over land only.Select the correct answer from the following codesa. 1,2 and 3Answer: cExplanation: When two different air masses meet, the boundary zone between them is called a front. It goes up to a height of 14 km from the surface of the earth. The rate of change of pressure with respect to distance is the pressure gradient. Atmospheric circulation, any atmospheric flow used to refer to the general circulation of the Earth and regional movements of air around areas of high and low pressure. The general circulation of the atmosphere also affects the oceans. Sometimes the winds in the middle and upper levels of the atmosphere change and steer the cyclone toward the north and northwest. These winds which are  straight and parallel to the isobar are known as geostrophic wind. Print The General Circulation of the Atmosphere Worksheet 1. sea breezes, and land breezes The air is a mixture of several gases and it encompasses the earth from all sides. 7, top). These winds affect temperatures and weather in a number of ways, like when air is pushed up mountains by winds, it expands as pressure decreases, causing temperature to decrease as well. 1,2 and 3Answer: dExplanation: It deflects the wind to the right direction in the northern hemisphere and to the left in the southern hemisphere. And the north easterlies winds move towards south western region. Neither 1 nor 2 Answer: bExplanation: Frictional force affects the speed of the wind. Absence of the Coriolis force2. Your email address will not be published. Only 1 and 2c. It is greatest at the surface and its influence generally extends up to an elevation of 1 - 3 km. They bring abrupt changes in temperature.Select the correct answer from the following codesa. In contrast to the Hadley, Ferrel and polar circulations that run along north-south lines, the Walker circulation is an east-west circulation. Atmosphere MCQ is important for exams like IBPS, SCC, UPSC, NEET etc. It is zone of convergence of easterlies from either side of the equator.Select the correct answer from the following codesa. ... Clear frontal system is visible in tropical cyclones. Only 1b. The cool air, of the high plateaus and ice fields draining into the valley is called katabatic wind.Q10. Front. 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. Neither 1 nor 2 Answer: aExplanation: The pattern of the movement of the planetary winds is called the general circulation of the atmosphere. I. Inter Tropical Convergence Zone (ITCZ) at equator. Only 1 and 2c. The negative shortwave anomalies are collocated with an increase in upper-level divergence, indicating an anomalous rising branch in the atmospheric circulation over the IAS (Fig. This results in variations in the atmospheric pressure. The geography is scientific in its orientation and hence the IAS Aspirants having Arts background find it very difficult to prepare the geography for the IAS Prelims Exam.Q1. Designed using Magazine Hoot. After completing the Atmospheric Circulation and Weather Systems it becomes important for students to evaluate themselves how much they have learned from the chapter. It sets in motion the ocean water circulation which influences the Earth’s climate. (ii) While the pressure gradient force is from north to south, i.e. The student knows that Earth's global ocean, powered by the Sun, is a major driving force for weather and climate through complex atmospheric interactions. 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