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Copy of Composition of the Atmosphere

Why is the atmosphere important?

Houston Svoboda

on 14 February 2011

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Transcript of Copy of Composition of the Atmosphere

Why Is the Atmosphere Important? First of all, we need to know what weather is. Weather is the condition of the Earth's atmosphere at a particular time and place. So what is the atmosphere? Earth's Atmosphere It is a thin layer of gases that surrounds the Earth.
It makes conditions on the Earth suitable for living things. Composition of the Atmosphere Nitrogen - 78% Oxygen - 21% Carbon Dioxide Nitrogen Most abundant gas in the atmosphere
78% of the air we breathe
Essential to living things - needed to grow and repair cells
Bacteria convert nitrogen from the air and then plants use it to create proteins that people and animals need. Oxygen Second most abundant gas in the air
Only 21% of the volume
Usually in the form of O2
Plants and animals use it
Important in other processes
Ozone (O3) forms when lightning interacts with Oxygen Carbon Dioxide CO2
Only in small amounts - .036%
Essential to life plants need it to make food Other Gases Called trace gases because only small amounts are present Water Vapor Particles Amount in the air varies from place to place
Plays an important role in the earth’s weather
Clouds, precipitation Pure air is only gases, but this exists only in a lab
In the real world, there are many different particles
Other chemicals Water Vapor Other Gases Particles of liquids and solids test Troposphere 75% of the Mass 99% of water vapor
of the Atmosphere 20 Km thick at
equator 7 Km thick at
the poles 11 Km Thick Average
(middle latitudes) tropopause Stratosphere Stratopause Jet Stream 99% dust particles All of the Weather 51 Km 20 km Temperatrure drops
as altitude increases 3.56 deg. per 1000ft. Lapse Rate - 64 *F Warmed fron ground heat 250 mph 19% of atm gas - 76 *F 65 *F Temperature INCREASES with
greater altitude Increase in absorbtion of Ultraviolet energy Ozone Ozone Ozone Ozone Ozone Ozone Ozone Ozone Ozone Ozone Ozone Ozone Ozone Ozone Most people can detece about 0.01 ppm (parts pre million) of ozone in the air. Odor is very sharp and distinct resembling chlorine bleach Exposure to 0.1 to 1 ppm produces headaches, burning eyes and irritation to throat and lungs. Low concentrations are very distructive to organic materials such as latex, plastics, and lungs. Filters out photons of ultraviolet light, also called UV rays, from the Sun that would be harmful to most forms of life in large doses. Commercial airliners travel in the bottom of the stratosphere. Low Temperature Less drag More Fuel efficient Bar- Headed Geese Ruppell's Vulture Sucked into jet engine @ 37,900 ft Mesosphere Thermosphere 85 Km Temperature drops Rapidly Very Thin Gases Where most meteors brurn up. 500-1000 Km Very Very Thin Massive Temperature variations. 500 - 2000 * F Contains Ionosphere Region of charged particles When hit with charged particle from the sun can cause Aurora http://gtm-media.discoveryeducation.com/videos/24436/chp921871_256k.asf Mesopause Thermopause
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