What is the heterosphere what is the homosphere heterosphere is above the from geography 100 at southwestern college. 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. The heterosphere is the upper portion of the earths atmosphere, in which gases are fractionated according to their molecular weight. Appendix a1 was largely developed by the following workshop group. What is the heterosphere what is the homosphere heterosphere. It is the earths atmosphere below the altitude of roughly 80 kms where there is an almost. Understand the difference between the homosphere and the heterosphere and give the approximate altitude of the transition. 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. Above the homopause is the heterosphere, where diffusion is faster than mixing, and heavy gases decrease in. Be able to describe the general temperature structure of the atmosphere, including names of the major spheres and their boundaries.
Heterosphere definition and meaning collins english dictionary. 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. 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 homosphere dominated by lighter gases with increasing altitude, such as hydrogen and helium. The heterosphere lies above the homosphere and is a zone of poor mixing where the average composition varies depending on the location within it. At altitudes from 80 to 1,000 kilometers km, the motion of ionospheric ions caused by the electric fields imposed by the magnetosphere drives largescale winds in the thermosphere. The below mentioned article provides quick notes on the atmospheric temperature and composition. Article about atmosfer by the free dictionary planetary atmospheres faculty. 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.
Some of the processes driving this uniformity include heating convection and air flow patterns. A complete and accurate knowledge of the geomagnetic field and how it changes with time is. Atmosphere stratosphere atmosphere of earth free 30. 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. The main reason for this wellmixed condition is that the mean free path between molecules is small compared to the scale of bulk motions of the air. Above about 64 kilometers 40 miles, in the upper homosphere and through the heterosphere, gases can be readily ionized by very shortwave radiation.
Exploring creation with physical science, second edition apologia has earned the reputation of being the premier science course for collegebound students. On average the heterosphere begins at an altitude of about 80 km. Atmosphere defined anatmospherenew latinatmosphaera, created in the 17th century fromgreek atmos vaporand sphaira sphere is a layer ofgasessurrounding a planet or othermaterial bodyof sufficientmassthat is held in place by thegravityof the body. Form 3 geography structure of the earth msomi maktaba. Although the composition of air is the same throughout these three regions, the concentration of air decreases significantly with increasing altitude. The upper part of the atmosphere, above about sixty miles, in which there is great variation in its composition heterosphere meaning. Wherever you see the prefix homo it indicates something that is the same, while the prefix hetero indicates difference. Understand the difference between the homosphere and the.
The heterosphere has many different compositions, depending on altitude. Winner of the standing ovation award for best powerpoint templates from presentations magazine. The lower part of the atmosphere, up to about sixty miles, in which there is no great change in its composition homosphere meaning. Other gases are argan, carbon dioxide, neon, helium, krypton, xenon, hydrogen etc. Heterosphere chemical p4 ionosphere oxygen univerthabitat. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The difference is that the temperature gradient rate of change, changes with each layer. An atmosphere is more likely to be retained if the gravity is high and the atmospheres. The heterosphere is the layer of an atmosphere where the gases are separated out by. The atmosphere also change composition with height and can be divided into two layers. What are the differences between, heterosphere and homosphere.
If you find that a lesson is too lengthy, simply end the. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. The heterosphere atmospheric temperature and composition atmosphere. The heterosphere atmospheric temperature and composition atmosphere geog. Know how the temperature lapse rate is defined and how to estimate the lapse rate in a layer from graphical or numerical data. It is very important to remember that the concentration of gases in the homosphere throughout the troposphere, the. The top of the homosphere is called the homopause, also known as the turbopause. The homosphere is the layer of earths atmosphere where chemical constituents are wellmixed. This part of the atmosphere continually circulates, so that the principal atmospheric gases are well mixed. Joule heating associated with these currents is an important energy.
Within the heterosphere, the thermosphere extends from the bottom of the. Homosphere exobase density collisional cross section 3x1015 cm2 scale height mean free path heterosphere critical level. Heterosphere article about heterosphere by the free. Homosphere can be defined as the lowest part of the earths atmosphere. The layer next to the earths surface is called the troposphere. The heavier molecules and atoms tend to be present in the lower layers of the heterosphere while the lighter ones are present higher up. Formation of the homosphere and heterosphere in the atmosphere can be explained as follows. It lies between the heterosphere and the surface of the earth. Heterosphere article about heterosphere by the free dictionary. Two layers of the atmosphere global climate climate policy.
This is the lowest part of the atmosphere which composed of uniform composition gas of uniform composition of gases and temperature homosphere consist of three layers. 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. Heterosphere dictionary definition heterosphere defined. Just read up on this myself, so this is a bit basic, but hopefully helpful. It is the mixture we learned in the previous module. Homosphere definition and meaning collins english dictionary. The heterosphere is the outermost sphere of the atmosphere, where the gases are distributed on distinct layers according to their atomic weight and gravitational pull. Above the homopause is the heterosphere, where diffusion is faster than mixing, and heavy gases decrease in density with altitude more rapidly than lighter gases.
Troposphere, stratosphere, mesosphere another atmosphere video, this one showing scenes from when joe kittenger skyjumped from over 19 miles from an air balloon. 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. Based on the atmospheric temperature profile, the atmosphere is classified into four regions. 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.
Define the difference between the homosphere and heterosphere. Ifor most purpose, we consider the homosphere virtually the entire atmosphere. 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. The homosphere extends from the earths surface up to an altitude of about 60 miles. The temperature changes in the homosphere also, and is called a temperature gradient. The text is written in a friendly, conversational style and is easy to understand, even for parents. Information and translations of homosphere in the most comprehensive dictionary definitions resource on the web. Ppt atmospheric structure and composition powerpoint. It lies above the homosphere, where chemical constituents are well mixed. The air in the upper atmosphere is very different from the air we breathe.
The exact boundaries between the different molecules. Homosphere article about homosphere by the free dictionary. Why dont the gases in our atmosphere separate and stratify. Heterosphere chemical p4 ionosphere oxygen 20200316 0 os411b. The homosphere is a zone of the atmosphere where the constituent gases are fairly well mixedon average the composition is homogeneous throughout. Its thickness ranges between 8 to 16 km depending upon the season and the latitude. Atmospheric temperature and composition atmosphere.
In the homosphere, the mixture of gases in the air is the same throughout. Thus free electrons and ions are plentiful, giving this region the name. The heliopause is that part of the solar system which is exposed to particles and ions of deep space. The lower portion of a twopart division of the atmosphere according to the general homogeneity of atmospheric composition. Homosphere homosphere is the layer which found between 0 80km above the sea level. No collision above exobase exosphere chamberlain 1978.