4. 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

5. 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

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

7. THERMOSPHERE 50 to 300 miles -90 ⁰ to + 1000 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

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

19. Conduction,Convection or Radiation ?

20. CONDUCTION

21. Conduction, Convection or Radiation ?

22. CONVECTION

23. Conduction, Convection or Radiation ?

24. Radiation

25. Conduction, Convection, or Radiation ?

26. CONDUCTION RADIATION CONVECTION

28. 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)

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

30. CO NO SO VOC PM

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