1. Also, this layer of the atmosphere has the lowest temperature of all layers, and they drop down to -90° C. 4. Atmosphere - Diagram Diagram of the layered atmosphere In its lowest layer (the troposphere, bounded by the tropopause) it comprises oxygen (21%), nitrogen (78%), carbon dioxide, water vapour, and other gases. Though its gaseous composition is similar, but the gaseous mass is only 15% of the total atmosphere, and it contains more ozone. Its lower boundary is called exobase or exopause, and this is the altitude above which atmospheric temperature remains almost constant. Most of the thermosphere is actually considered part of outer space due to this low air density. Content Guidelines 2. Exam includes questions surrounding: - Labelling the five major layers of the atmosphere and stating the elevation, temperature and common sightings in each layer - The importance of the ozone layer - Different gases found in the atmosphere and their percentage - Insolation and its affect on the Ea. All rights reserved. Ans. Beyond 500 km the thermosphere becomes increasingly rarefied and extends to the extreme outer limit of the atmosphere at about 40,000 km. Namely, troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). A further region, beginning about 500 km above the Earth’s surface, is called the exosphere. Share Your Word File Save Comp. Ans. Download a Free Preview or High Quality Adobe Illustrator Ai, EPS, PDF and High Resolution JPEG versions. © 2021 (Science Facts). Its size varies with daytime and nighttime. The first slide consists of a semi-circular shaped atmosphere diagram with 5 divisions. Temperature: 932°F (500°C) to 3,632°F (2,000°C) – depends on how hot the sun is. It contains most of our weather - clouds, rain, snow. Welcome to BiologyDiscussion! The names of these layers, in order of lowest to highest, are: Temperature: 62°F (17°C) around the lowest point  to -60°F (-51°C) near the top. Also, jet aircraft and weather balloons fly in this layer as there is less turbulence. 12. Diagram of the layers within Earth's atmosphere. In this layer the gases are present in the atomic state and exhibit a sort of layering. The troposphere is the lowest layer of the atmosphere. In troposphere, the average rate of temperature decrease is 6.4°C per km of ascent, but in Stratosphere the temperature shows a gradual increase. Temperature: Ranges from 32°F (0°C) to -130°F (-90°C), the lowest temperature found on Earth. Privacy Policy3. The troposphere contains about 75% of the air found in the atmosphere and nearly all the water vapor. The fourth layer or the thermosphere or heterosphere starts at an altitude of about 80 km. Atmosphere Layers Diagram Layers of the atmosphere project: Use CH 17 Section 1, pgs 477-480 for help. Atmosphere is usually divided into four layers called the troposphere, stratosphere, mesosphere, and the thermosphere (Fig. Science for kids. It is the densest layer, containing more than half the volume of total air. Troposphere. It is called as Troposphere. With a starry background and appropriate doodle art/figures, it perfectly explains the use of each layer. Lying between the upper mesosphere and the lower thermosphere is the so-called ionosphere because free electrons and ions exist in this region. Use the entire sheet for the diagram, then the next page for the questions: 1. 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