Homosphere can be defined as the lowest part of the earths atmosphere. What links here related changes upload file special pages permanent link page. Elements and compounds are transferred through the four spheres of the earth system in biogeochemical. Ifor most purpose, we consider the homosphere virtually the entire atmosphere. The homosphere extends from the earths surface up to an altitude of about 60 miles. The heterosphere is characterized by variation in the composition and the mean molecular weight of constituent gases. Diatomic nitrogen n 2, a relatively heavy gas, drops off rapidly with height and read more. Although the composition of air is the same throughout these three regions, the concentration of air decreases significantly with increasing altitude. The heterosphere is the layer of an atmosphere where the gases are separated out by. Be able to describe the general temperature structure of the atmosphere, including names of the major spheres and their boundaries.
In the homosphere, the mixture of gases in the air is the same throughout. The upper portion of a twopart division of the atmosphere according to the general homogeneity of atmospheric composition. The homosphere is composed of the troposphere, the stratosphere, and the mesosphere. It lies between the heterosphere and the surface of the earth. Homosphere lower area of earths atmosphere heterosphere heterosphere the layers of the atmosphere, above 80 km altitude, through which the chemical composition of the air changes markedly with height, principally as a result of oxygen dissociation.
Above 80 km, in the layer known as the heterosphere, the gases settle out based on their molecular weights. In this region, which occurs below 100 km about 60 miles or so, the composition of the atmosphere tends to be independent of height. Jun 04, 2017 the atmosphere also change composition with height and can be divided into two layers. Heterosphere homosphere dominated by lighter gases with increasing altitude, such as hydrogen and helium. The proportions of the principal gases nitrogen and oxygen change with altitude in the. The heterosphere filters out high energy solar radiation, as a result of which the temperature of the troposphere is conducive to life on earth. As nouns the difference between heterosphere and homosphere is that heterosphere is the upper part of the atmosphere, above about sixty miles, in which there is great variation in its composition while homosphere is the lower part of the atmosphere, up to about sixty miles, in. Know how the temperature lapse rate is defined and how to estimate the lapse rate in a layer from graphical.
Dec 04, 2016 the atmosphere up to 80 km is called the homosphere and the atmosphere aloft is heterosphere. Understand the difference between the homosphere and the. The ionosphere protects us from dangerous radiation by absorbing or. Troposphere lapse rate usually positive where we live stratosphere lapse rate negative ozone is in the stratosphere and causes warming mesosphere lapse rate positive thermosphere lapse rate negative scotts mnemonic. Formation of the homosphere and heterosphere in the atmosphere can be explained as follows. Oct 14, 2008 the homosphere is the portion of the earths atmosphere, up to an altitude of about 50 miles above sea level, in which there is continuous turbulent mixing, and hence the composition of the atmosphere is relatively constant. The atmosphere up to 80 km is called the homosphere and the atmosphere aloft is heterosphere. The main difference between the atmospheres is that of different or uniform. The lower portion of a twopart division of the atmosphere according to the general homogeneity of atmospheric composition. Jul 10, 2010 the homosphere is a zone of the atmosphere where the constituent gases are fairly well mixedon average the composition is homogeneous throughout. With reference to my previous blogs regarding the referred heading, earths atmosphere is segmented into two major zones. The lower part of the atmosphere, up to about sixty miles, in which there is no great change in its composition homosphere meaning. What links here related changes upload file special pages permanent link.
July 31, 2012 5 chapter 4 presents a background to the issue of the solar and geomagnetic indices that. Define the difference between the homosphere and heterosphere. The homosphere is the lower of the two and the location in which turbulent mixing dominates the molecular diffusion of gases. Compare contrast the homosphere and the heterosphere.
How does the ozone layer demonstrate gods provision. True or false based on the information in the chapter, determine whether each of these statements is true or false. It lies above the homosphere, where chemical constituents are well mixed. Beyond the molecular nitrogen layer there are layers containing predominantly atomic oxygen, helium and hydrogen respectively. The heterosphere lies above the homosphere and is a zone of poor mixing where the average composition varies depending on the location within it. The heterosphere is the layer of an atmosphere where the gases are separated out by molecular diffusion with increasing altitude such that lighter species become more abundant relative to heavier species. The bulk composition of the air is mostly uniform so the concentrations of molecules are the same throughout the homosphere. As nouns the difference between heterosphere and homosphere is that heterosphere is the upper part of the atmosphere, above about sixty miles, in which there is great variation in its composition while homosphere is the lower part of the atmosphere, up to about sixty miles, in which there is no great. Except for the extremely variable water vapour in the troposphere and ozone in stratosphere, the atmosphere is well mixed and has a constant composition up to about 80 km.
On average the heterosphere begins at an altitude of about 80 km. In protonosphere the earths atmosphere, called the homosphere 100 km about 65 miles, turbulence causes a continuous mixing of the atmospheric constituents, whereas in the heterosphere, above 100 km, the various constituents tend to separate out. The upper portion of a twopart division of the atmosphere the lower portion is the homosphere according to the general homogeneity of atmospheric composition. Heterosphere article about heterosphere by the free. On the basis of composition, it can be divided into three main regions, the homosphere, the heterosphere, and the exosphere. Atmospheric temperature and composition atmosphere. The lower layer is called the homosphere and has the composition we talked about earlier. Homosphere definition and meaning collins english dictionary. The heterosphere has many different compositions, depending on altitude. Read the paragraph on page v in solutions and tests for exploring creation with physical science regarding cumulative tests, which are.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. Above 1,000 km about 600 miles, helium and hydrogen are the dominant species. Grades 2 closedbook exams, 650 points total 3 takehome quizzes, 150 points total 5 of 7 inlecture quizzes, 100 points total 4 indiscussion quizzes, 100 points. Heterosphere definition and meaning collins english dictionary. The homosphere is the layer of an atmosphere where the bulk gases are homogeneously. The homosphere begins at the earths surface and extends to an altitude of about 80 km.
The top of the homosphere is called the homopause, also known as the turbopause. The heterosphere also incorporates the ionosphere with ions present in the heterosphere s lower levels. The upper part of the atmosphere, above about sixty miles, in which there is great variation in its. Information and translations of homosphere in the most comprehensive dictionary definitions resource on the web. A test scores sheet is provided so that all test scores can be recorded in one place for a permanent record. At about 2025 km, however, there is high concentration of. The heavier molecules and atoms tend to be present in the lower layers of the heterosphere while the lighter ones are present higher up. The homosphere is the portion of the earths atmosphere, up to an altitude of about 50 miles above sea level, in which there is continuous turbulent mixing, and hence the composition of the atmosphere is relatively constant. A hypothetical atmosphere in which the density is constant with height. Homosphere is the lower of the two and the location in which turbulent mixing dominates the molecular diffusion of gases. The layer adjacent to the homosphere contains mainly molecular nitrogen.
Understand the difference between the homosphere and the heterosphere and give the approximate altitude of the transition. Heterosphere definition and meaning collins english. Heterosphere below the turbopause at an altitude of about 100 km, the earths atmosphere has a moreorless uniform composition apart from water vapor as described above. Due to the diffused nature of the heterosphere s gases, its density at any given height is not entirely dependent on the temperature. At about 2025 km, however, there is high concentration of ozone. The homosphere is a zone of the atmosphere where the constituent gases are fairly well mixedon average the composition is homogeneous throughout. Atmospheric and oceanic sciences 33l introduction to the atmospheric environment instructor dr. The thermosphere comprises roughly the same layer as the homosphere. The atmosphere also change composition with height and can be divided into two layers.
First, because separation of the gases is highly energetically unfavorable, since the definition of gibbs free energy, which governs process spontaneity, has an entropy term that is minimzed when gases are well mixed over any given volume. Heterosphere is the upper portion of a twopart division of the atmosphere according to the general homogeneity of atmospheric composition. Cospar international reference atmosphere cira2012 version. Websters new world college dictionary, 4th edition. However, above about 100 km, the earths atmosphere begins to have a composition which varies with altitude. It is the earths atmosphere below the altitude of roughly 80 kms where there is an almost. This part of the atmosphere continually circulates, so that the principal atmospheric gases are well mixed. It is the earths atmosphere below the altitude of roughly 80 kms where there is an almosthomogenous composition of nitrogen 78%, oxygen 21%, argon 10%, carbon dioxide as well as traces of constituents. Gases in the heterosphere are evenly mixed and generally inert. The homosphere is the layer of an atmosphere where the bulk gases are homogeneously mixed due to turbulent mixing or eddy diffusion. As nouns the difference between heterosphere and homosphere is that heterosphere is the upper part of the atmosphere, above about sixty miles, in which there is great variation in its composition while homosphere is the lower part of the atmosphere, up to about sixty miles, in which there is no great change in its composition. A storm that typically develops in warm humid air masses, away from fronts. Composition, structure and stratification of the atmosphere. It is the mixture we learned in the previous module.
Above the homosphere is the heterosphere, which is stratified according to the molecular weight of its constituent gases. The homosphere is the region in which there is no gross change in atmospheric compositionthat is, all the atmosphere from the earths surface to about 50 miles 80 km. The second is 95% helium, 4% hydrogen, and 1% other. Above the homopause is the heterosphere, where diffusion is faster than mixing, and. The variable gases are those that occur in different amounts in different times and places. An atmospheric gas that varies significantly in concentration from one location to another near sealevel is. The heterosphere is the upper portion of the earths atmosphere, in which gases are fractionated according to their molecular weight. Already noted is that water vapor is not uniformly mixed in the homosphere. Homosphere article about homosphere by the free dictionary. Above the homosphere lies the heterosphere, a layer in which the gases are stratified into four shells. Heterosphere article about heterosphere by the free dictionary. Other gases are argan, carbon dioxide, neon, helium, krypton, xenon, hydrogen etc. There are 4 layers in the atmosphere that are defined by lapse rate from the bottom up. A cross section through the homosphere, heterosphere, and exosphere.
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