TROPOSPHERE 0-6 miles (poles) 12 miles (equator) As A↑T↓ (15 ⁰ to -55⁰ C) Where weather happens We live here Highest air pressure/water vapor 75% of all air molecules

STRATOSPHERE 6 TO 30 MILES -55⁰ to 0⁰ C As A↑ T↓ Contains the OZONE (O 3 ) Protects us from ULTRAVIOLET Radiation Planes fly here The JET STREAM occurs here

MESOSPHERE 30 to 50 miles 0⁰ to -90⁰ C As A↑ T↓ Coldest layer of the atmosphere METEORS burn up here

THERMOSPHERE 50 to 300 miles -90 ⁰ to ⁰ C As A↑ T↓ Contains charged particles/ ionosphere Transmits radio waves (ISS orbits here) Northern/southern lights (aurora) Absorbs gamma rays and x-rays

EXOSPHERE Above 300 miles As A↑ T↓ Has some H, He, OUTER SPACE Hubble Space Telescope orbits here

Conduction,Convection or Radiation ?

CONDUCTION

Conduction, Convection or Radiation ?

CONVECTION

Conduction, Convection or Radiation ?

Radiation

Conduction, Convection, or Radiation ?

CONDUCTION RADIATION CONVECTION

AIR POLLUTION When harmful substances build up in the air to harmful levels Most is the result of human activities Some from natural activities (volcanoes, dust, pollen, spores)

PRIMARY POLLUTANTS Put directly into the air from human activity Chart p 304 Carbon Monoxide Nitrogen Oxides Sulfur Dioxide Volatile Organic Compounds Particulate Matter

CO NO SO VOC PM

Secondary Pollutants Form when primary pollutants interact Chemical reaction between primary pollutants