test, which makes it an ideal choice for Indians residing We follow a systematic approach to the process of learning, examining and certifying. These gases are found in layers (troposphere, stratosphere, mesosphere, thermosphere, and exosphere) defined by unique features such as temperature and pressure. Which of the following is a major greenhouse gas? This book describes the needs for end user communities, focusing in particular on needs that are not being met by current urban-level forecasting and monitoring. The other three are biosphere, hydrosphere and lithosphere. graduation. Heat moves in the atmosphere the same way it moves through the solid Earth (Plate Tectonics chapter) or another medium.What follows is a review of the way heat flows and is transferred, but applied to the atmosphere. The air has a special place among the conditions necessary for life. d) Suggest a reason why the surface wind speed and upper atmosphere wind speed near Hawaii are so different. Not all light and energy bounce off real objects, so reflectivity can be thought of as a continuum from objects being perfectly reflective to having no reflectivity. D. Carbon dioxide . (d) Oxygen. Several other gases, such as water vapor, carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and ozone (O3) play significant roles in global climate through their interaction with energy emitted by the Sun and re-emitted by the Earth. Multiple choice questions. 9. Stratosphere 3. Answer. GEOGRAPHY 9 ATMOSPHERE COMPOSITION AND STRUCTURE Earth is a unique planet because the life is found only on this planet. It has following features: Its average height is 13 km. It contains the air we breathe, clouds, wind, rain, and other aspects of weather. It is held near the surface of the planet by Earth's gravitational attraction. Let us take the word "geography" apart. Geography is not only one of the interesting or fun subjects but it is also one of the most important subjects that you are asked about in the competitive exams. The density of Atmosphere is maximum at sea level and decreases with increasing height. Aerosols play an important role in the energy balance of the Earth and aid in the formation of clouds and precipitation. The atmosphere is not homogeneous in any of its attributes, but instead has different layers that vary in temperature, air pressure, and the amount and composition of gases. The concept of "space" may be conceived as a supplement to things, i.e. How to use atmosphere in a sentence. Weather is how the atmosphere is behaving on a day to day basis including temperature, rain and wind. This dark, dull-textured sphere is highly absorbent, retaining most of the light that strikes it, accounting for the sphere's dark color (not much light coming back off the surface). This volume develops and refines the concept of atmosphere, seeking to render it productive for anthropological and social scientific research by bringing together a range of original ethnographic studies in combination with investigation ... There is no work in geography that does not certain it. It is one of the four components of the Earth's ecosystem. The lowest layer of the atmosphere is the one with which we surface-dwellers interact. 7. Grade 10 and 12 level courses are offered by NIOS, Indian National Education Board established in 1989 by the Ministry of Education (MHRD), India. The outermost layer of the earth's atmosphere is known as the exosphere which lies between 400-1000km. Physical geography is the branch of natural science which deals with the study of processes and patterns in the natural environment such as the atmosphere, hydrosphere, biosphere, and geosphere, as opposed to the cultural or built environment, the domain of human geography. When the entire textbook (30 chapters) is finished its cost will be only $29.70 in USA dollars. This is far less expensive than similar textbooks from major academic publishing companies whose eBook are around $50.00 to $90.00. An airmass ascends and becomes unstable when it becomes warmer than the surrounding airmass while . The third most prominent gas is argon, which is only 0.9 percent. Factors that affect the temperature of different places around the world: latitude, altitude, ocean currents and distance from oceans. Atmospheric Moisture. Absorption — Objects retain some of the energy that strikes them, and this process of retention is called absorption. Question 2. This could significantly raise the temperature at lower levels of the atmosphere thus inducing drastic climatic changes. The moisture it contains is an essential part of the water cycle. The book first discusses the atmospheric system, including atmospheric circulation and energy in the system. The text then examines the variable atmosphere. National Geographic Society is a 501 (c)(3) organization. If the area receives little rainfall, then evapotranspiration can reach 100% of the total precipitation as in the southwestern United States . An atmosphere is the layers of gases surrounding a planet or other celestial body. Perfect E Learn is committed to impart quality education through online mode of learning – the future of education across the globe in an international perspective. The air we breathe exists here. It will totally squander the time. The text is a valuable reference for geographers and readers interested in physical geography. Question 1. All living things need some of the gases in air for life support. The movement of air across the planet occurs in a specific pattern. The air encompasses the earth from all sides. asked Mar 28 in The upper part of the mesosphere is very cold (?85°C, ?120°F), and is considered by many scientists to be the coldest place within the Earth system. Answer. Carbon capture is a term used to describe the use of technology capturing carbon emitted from power stations. Insolation is the incoming solar radiation. These particulates help in the scattering of solar radiation which adds varying charming colour of red and orange at dawn and dusk. In the previous articles in the Geography section, we have discussed in detail about the composition and structure of the earth's atmosphere, how and from where the earth receives its energy, how the earth maintains its temperature, methods through which the heat energy gets transferred in the atmosphere (insolation and heat balance of the earth) etc. Ionosphere 5. Near the surface, the greater weight of the overlying atmosphere results in more molecules being tightly packed close to the surface of the Earth and a rapid thinning of the number of molecules with distance upward in the atmosphere, away from the surface. The Stratosphere layer is very dry as it contains little water vapour. Answer: Use the above-provided NCERT MCQ Questions for Class 7 Geography Chapter 4 Air with Answers Pdf free download and get a good grip on the fundamentals of real numbers topic. Hydrogen and helium gases predominate in this outermost region. Contact Us. Global atmospheric circulation - Polar, Ferrel and Hadley cells. What is the Atmosphere? The small solid particles present in the atmosphere originate from different sources and include sea salts, fine soil, smoke-soot, ash, pollen, dust and disintegrated particles of meteors. Ozone (03) Ozone (03) is another important gas in the atmosphere, which is actually a type of oxygen molecule consisting of three, instead of two, atoms. The first person to use the word γεωγραφία was Eratosthenes (276-194 BC). Fact 4: The Earth is known as water planet in light of the fact that life on the Earth entirely depends on the water that exists in the hydrosphere. Here we discuss four types of interactions: transmission, reflection, absorption, and scattering.
Geography is the study of physical features of the earth and its atmosphere, the study of its people, earth and environment. The Atmosphere. Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Geography is the study of the physical features of the earth's surface and atmosphere and how those features are affected by natural and human effects. Class 11 Geography Chapter 11 NCERT Textbook Questions Solved. The atmosphere is the body of gasses that surrounds our planet, held in place by earth's gravity. Physical Geography. Atmosphere definition is - the whole mass of air that surrounds the Earth. Almost all the weather phenomena like rainfall, fog and hailstorm occur in this layer. In geography, all the water on Earth, whether it is found in water bodies, the ground, the air, or in living organisms is known as the hydrosphere. These can change hour by hour, day by day. Heating of the atmosphere. Gases in the atmosphere preferentially scatter blue light, which spreads out in all directions through the atmosphere, causing the dominantly blue color of the sky. What is the character and composition of the atmosphere, and how does it interact with light coming from the Sun? (c) Dust particle. a natural feature of the earth's surface. BA Geography. Examine the figure below and then read the text from the bottom left, starting with the lowest and most familiar part of the atmosphere. The atmosphere of Earth is actually primarily made from nitrogen, with a composition of 78 percent. One of the main components of Earth's interdependent physical systems is the atmosphere. It's partly demographics, and its part hydrology But all of it includes that thing we call humanity And now you've got your shingle and you're headed out the door Cleaning up this mess is what Geography is for tuition and home schooling, secondary and senior secondary level, i.e. Climate and Weather; People and Places; CAPS Doc; Virtual Tours. Educational programs for all ages are offered through e learning, beginning from the online One of the main components of Earth’s interdependent physical systems is the atmosphere. Radiation is the transfer of energy between two objects by electromagnetic waves.Heat radiates from the ground into the lower atmosphere. Question 2. The concept of "space" is one of the most fundamental of geographical concepts. The solar output received at the top of the atmosphere varies slightly in a year due to the variations in the distance between the earth and the sun. Most of our atmosphere is located close to the earth's surface where it is most dense. An atmosphere (from Ancient Greek ἀτμός (atmós) 'vapour, steam', and σφαῖρα (sphaîra) 'sphere') is a layer of gas or layers of gases that envelope a planet, and is held in place by the gravity of the planetary body. This book has been designed to cover the syllabus of physical geography required for the B.A. students of Indian Universities. Climate means the average weather conditions in a particular location based on the . A. Decreases . 1. Carbon dioxide, helium, ozone, argon and hydrogen are found in lesser quantities. A systems-based approach to physical geography written in an easy-to-understand narrative style that is closely integrated with clear, single-concept illustrations. Geography (from Greek: γεωγραφία, geographia, literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and phenomena of the Earth and planets. Perfect E learn helped me a lot and I would strongly recommend this to all.. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. 1145 17th Street NW (b) absolute humidity. I A stellar atmosphere is the outer region of a star, which . The air of our planet is 79% nitrogen and just under 21% oxygen; the small amount remaining is composed of argon, carbon dioxide, and other trace gasses. 10. The atmosphere is largely transparent to visible light, allowing it to pass through and illuminate Earth's surface. Examine this view of Earth, taken from a spacecraft orbiting high above the Earth. The atmosphere blocks harmful ultra-violet radiations to reach Earth. Physical Geography. pedology. The Atmosphere is a domain that consists of layers which are the troposphere, stratosphere, mesosphere, thermosphere as well as the exosphere. The annual mean temperature on the surface of the earth is always constant. Nitrogen is required for the fertility of . glaciology. The atmosphere is held in place by the balance between gravity (which is directed downward and keeps the gases close to the surface) and a buoyancy force (which is directed upward and exists because material tends to flow toward the vacuum of outer space). Layer # 1. The insolation is made up of energy transmitted directly through the atmosphere and scattered energy. The atmosphere is not completely homogeneous in its vertical, horizontal, or temporal composition, but chemists and atmospheric scientists have estimated its average composition, as represented in the graph and table below. www.pmt.education Air Masses - A body of air which share similar conditions in terms of temperature, humidity and pressure.. Air Pressure - The weight of the atmosphere above a particular point, due to gravity. Answer: The blanket of air upto 1500 km surrounding the earth is known as atmosphere. Found insideATMOSPHERES OF AND IN GEOGRAPHY by Libera D'Alessandro, Rosario Sommella and Lida Viganoni19 1. The atmospheres of geography The most effective way to introduce this contribution is to paraphrase the title we have chosen, i.e. not only ... The great majority of Earth's water is contained in the oceans , seas, and bays with 96.5% and totals about 321,000,000 cubic miles. Privacy Notice | Geography is an all-encompassing discipline that seeks an understanding of Earth and its human and . in KSA, UAE, Qatar, Kuwait, Oman and Bahrain. What Might Happen If This Location Is Deforested? Our atmosphere is divided into five layers which are: troposphere, stratosphere, mesosphere, thermosphere and exosphere. atmosphere synonyms, atmosphere pronunciation, atmosphere translation, English dictionary definition of atmosphere. These heat-trapping gases can be thought of as a blanket wrapped around Earth, keeping the planet toastier than it would be without them. The greenhouse effect is the way in which heat is trapped close to Earth's surface by "greenhouse gases.". This book has been designed to cover the syllabus of physical geography required for the B.A. Students of the Indian Universities. Italy is 600 miles long and 150 miles wide. We are most aware of air when it moves and creates wind. Atmosphere refers to the gases surrounding a star or planetary body held in place by gravity. Question 1 (i). Over 70% of the mass of the atmosphere is in the lowest 10 km, that is, within the troposphere. With many interesting real-world examples, this book offers a unified vision of the chemical and physical processes occurring in planetary atmospheres. Ancillaries are available at www.ajax.ehu.es/planetary_atmospheres/ The Atmosphere; Geomorphology; Population; Water in the World; Grade 11 CAPS. When Sun's energy directly falls over the water bodies, it makes it immensely warm. For visible light, objects that are white or made of shiny, polished metal are highly reflective, whereas dark, rough objects have low reflectivities. So even if geography was the worst subject for you, you have to study it to clear some of the competitive exams. But, our concern was whether she could join the universities of our preference in abroad. However below, subsequent to you visit this web page, it will be suitably certainly easy to acquire as with ease as download guide geography atmosphere question paper grade 11 1. The lowest part of the stratosphere is an altitude at which many commercial jets fly because the air offers less resistance to motion, allowing appreciable fuel savings. Newsroom | c) What explains the difference in wind direction between the surface and the upper atmosphere in the tropical Pacific near Hawaii? and water vapour in . At the outermost boundary of our atmosphere, the kinetic temperatures may reach to about 55700C. Without the atmosphere there will be no life on Earth.
Apart from the energy generated by the decay of radioactive minerals in rock, the energy that drives terrestrial radiation ultimately comes from the Sun, and it is a major factor in the study of global warming. The Atmosphere; Geomorphology; Population; Water in the World; Grade 11 CAPS. Q 6 - The actual amount of water vapour present in the atmosphere is known as (a) humidity (b) absolute humidity (c) aridity (d) relative humidity. The air is a mixture of sev-eral gases. In the summer sun, a white car, which reflects much of the Sun's heat, is cooler than a dark car that is not so reflective. Composition of the Atmosphere. Without an atmosphere, Earth would likely be just . A RELATIVELY THIN LAYER OF GAS — the atmosphere — surrounds Earth's surface. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. program which is essential for my career growth. The mesosphere and thermosphere contain only a few tenths of a percent of the atmosphere's mass. The atmosphere in this region is so rarefied that it resembles a nebula. and with the Hebrew . geographic or geographical (adjective): relates to geography and refers to the features and location of an area. More carbon dioxide in the atmosphere means more heat absorption. Name the important layers of the atmosphere. Online tuition for regular school students and home schooling children with clear options for high school completion certification from recognized boards is provided with quality content and coaching. A stellar atmosphere is the outer region of a star, which . This layer provides some advantages for flight because it is above stormy weather and has steady, strong, horizontal winds. have discontinued my MBA as I got a sudden job opportunity after Question 2. How is the atmosphere kept in place around the earth? Above the stratosphere is the mesosphere, where “meso” is Greek for “middle,” in reference to this layer being in the middle of the atmosphere. Clouds, which are so conspicuous in any image of Earth taken from space, mostly circulate within the lower atmosphere, bringing rain and snow. The sun heats layers of the atmosphere causing it to convect driving air movement and weather patterns around the world.
Nitrogen and oxygen are the two gases which make up the bulk of the atmosphere. The shiny but rough sphere shown here has a highly reflective surface, but the roughness causes light to be scattered in various directions. Climate and Weather (Grade 12 CAPS) Geomorphology (Grade 12 CAPS) Grade 12. It has five layers: troposphere, stratosphere, mesosphere, thermosphere and exosphere. The MCQ Questions for Class 11 Geography with answers have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Standard 11 by CBSE, NCERT and KVS. Answer: The important gases that are found in atmosphere are nitrogen, oxygen, carbon-dioxide, hydrogen, helium and argon. Lifeform sustains on troposphere which is the first layer of the atmosphere. The air without vertical movement is called stable air while unstable air undergoes vertical movement (both upward and downward). helped me to continue my class without quitting job. CBSE Class 11 Geomorphic Composition and Structure of Atmosphere MCQs with answers available in Pdf for free download. ADVERTISEMENTS: Different forms of precipitation (dew, fog, rainfall, frost, snowfall, hailstorm etc.) Which one of the following is the most important constituent of the atmosphere for human beings? the scientific study of climate. This text gives a simple view of the structure of the boundary layer, the instruments available for measuring its mean and turbulent properties, how best to make the measurements, and ways to process and analyse the data.
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