Atmosphere By: Agustin Peñaherrera
What is it? • It is a layer of gasses that surrounds the Earth. • All these gasses are hold down by Earths Gravity. • Our atmosphere is what makes life sustainable by retaining gasses as Oxygen and dispersing many UV rays from the sun. • It is composed by 78% Nitrogen, 21% Oxygen and 1% Argon.
How it is divided? • It is divided in 5 main layers. • These layers are: exosphere, thermosphere, mesosphere, stratosphere, troposphere (from highest). • As higher the altitude, the thinner the atmosphere becomes.
Outer Space? • The boundary to outer space has been in question for many years. • The FIA (FédérationAéronautiqueInternationale) says the Karman Line located at a height of 100 kilometres is the boundary to outer space. • The Karman Line is located in the Thermosphere
Troposphere • The first layer from Earth. • It extends form the surface of Earth to 9 km normally and 20 km in the poles. • It contains at least 80% of the mass in the atmosphere. • The bottom of the Troposphere is the warmest, and it goes down with height. • The tropopause is the boundary between the Stratosphere and the Troposphere. • Pressure is at 1 bar.
Stratosphere • It extends at a height of 20 km to 50 km. • Near the Tropopause temperature may drop to -60 Celsius. • The Stratopause is the boundary between the stratosphere and Mesosphere. • Pressure rounds from 100 millibars to 1 millibar.
Mesosphere • It extends at a height of 50 km to 85 km. • Most meteors burn in this layer. • Here the temperature may drop to -100 Celsius, the coldest place in Earth. • Pressure rounds from 1millibar to 0.01 millibars.
Thermosphere • It extends at a height of 85 km to 690 km. • Temperature can rise to 1500 Centigrade. • Particles travel a average of 1 km before crashing. • The Karman Line is located in this layer. • Pressure rounds at 0.001millibars.
Exosphere • It is the outermost layer of the atmosphere. • Mainly composed by helium and hydrogen. • Particles can travel thousands of km before crashing. • It extends at a height of 690 km to 10,000.
Temperature and Pressure • In our atmosphere the higher you get the lower the pressure will get.
Bibliography • "Layers of the Earth's Atmosphere." : Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere. Web. 17 May 2012. <http://www.windows2universe.org/earth/Atmosphere/layers.html>. • "Layers of the AtmosphereMouseover the Pictures and Scroll down to Learn More." Layers of the Atmosphere. Web. 17 May 2012. http://www.vtaide.com/png/atmosphere.htm • "Atmosphere Layers." Atmosphere Layers. Web. 17 May 2012. <http://www.eoearth.org/article/Atmosphere_layers>. • "Atmosphere of Earth." Wikipedia. Wikimedia Foundation, 17 May 2012. Web. 17 May 2012. <http://en.wikipedia.org/wiki/Atmosphere_of_Earth>. • Images • http://e4.data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAkGBhQPDg4NDQ8Q • http://t0.gstatic.com/images?q=tbn:ANd9GcSyg8tKUxIYr_Foea-LGEKoTz5a4jlIMkmzfvwyUe021Iti0Arm