Transcript ES air
AIR Add to note sheet during powerpoint Earth’s Atmosphere Objectives: • Name the common gases in the atmosphere • Describe the structure of our atmosphere • Explain what causes air pressure Mixture of solids, liquids and gases Normally: • 78% Nitrogen • 21 % Oxygen • 0.93% Argon • 0.03 Carbon Dioxide • Up to 4% Water Vapor Sulfur+ Oxygen + Nitrogen + Sunlight SMOG Other things in the Atmosphere • Solids ===> Dust & ice • Liquids ==> Rain Why is the atmosphere important? • Protects us from UV rays from the Sun • Holds in heat to warm the Earth at night • No atmosphere = No Life Troposphere Closest to Earth 75% of air molecules are here Weather, Clouds, & Smog are here Colder with rising Altitude The tropopause is the altitude at which the temperature stops decreasing. Stratosphere • • • • Jets fly here Ozone layer is here Hot !! At the stratopause, air temperature stops increasing with altitude. Mesophere • “Middle Layer” • Coldest layer of the atmosphere • Air temperature decreases with altitude. • Temperatures stop decreasing with altitude at the mesopause. Thermosphere • Very Hot!!!! • This is where meteors burn & turn into “shooting stars” • Includes the IONOSPHERE – – Layer of electrically charged particles Exosphere • Merges with outer space Magnetosphere • Invisible force field • Acts as a shield from Electromagnetic radiation from the SUN Atmosphere Foldable Answer the following questions on the back of the direction sheet: • #1, 2, 3, 4, 5, 6,7 Air Pressure • Measured with a BAROMETER • What causes it???? Assignment • 1)foldable on Tuesday