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Friday, May 2 nd , 2014

Friday, May 2 nd , 2014. Did you know… House flies have a lifespan of 2 wks. The Atlantic Giant Squid's eye can be as large as 40cm (15.75in) wide. It takes ~12 hrs for food to entirely digest. Do Now: May 2 nd. What is differential heating?

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Friday, May 2 nd , 2014

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  1. Friday, May 2nd, 2014 • Did you know… • House flies have a lifespan of 2 wks. • The Atlantic Giant Squid's eye can be as large as 40cm (15.75in) wide. • It takes ~12 hrs for food to entirely digest.

  2. Do Now: May 2nd • What is differential heating? • What are the differences btwn polar, temperate, & tropical zones? • How can cities at the same latitude have different weather patterns?

  3. YouTube Friday • http://www.youtube.com/watch?v=cU-eAzNp5Hw • http://www.youtube.com/watch?v=OQm3FjLo-mk

  4. Early Atmosphere • Produced by erupting volcanoes • Mostly Nitrogen, little Oxygen • O2 appeared as orgs photosynthesized (made food from sunlight)

  5. Air Composition • 78% Nitrogen (N2) • 21% Oxygen (O2) • >1% Argon (Ar) Trace Gases Dust, bacteria, & particulates

  6. Trace Gases • ppmv: parts per million by volume • Carbon dioxide (CO2) = 340 ppmv • Neon (Ne) = 18 ppmv • Helium (He) = 5 ppmv • Methane (CH4) = 2 ppmv • Hydrogen (H2) = 0.5 ppmv

  7. Red Tint of Sunrise/Sunset • http://formontana.net/sun.html

  8. Atmosphere has 5 layers • Air pressure & temp change w/ altitude

  9. Troposphere • Lowest/closest atmospheric level • 0 - 16km (~10mi) • Weather takes place • Temp drops as height incr • Most air pollution

  10. Stratosphere • 2nd closest atmospheric layer • 16 - 50km (31mi) • Concentrated, protective ozone • Temp incr as height incr • Jets fly here • Jet stream: rivers of air in base of layer

  11. Mesosphere • Middle atmospheric layer • 50 - 90km (56mi) • Coldest layer of atmosphere • Temp decr as height incr • Meteors burn up here

  12. Thermosphere • 4th atmospheric layer • 90 - 300km (186mi) • Temp incr as height incr • Hottest layer • Lonosphere: makes auroras (curtains of light)

  13. Exosphere • Outermost/farthest atmospheric layer • Temp incr w/ height incr • Composed mostly of hydrogen & helium • Satellites orbit earth • No clear boundary btwn atmosphere & space

  14. Pressure & Density • Gravity pulls gases toward surface • Air pressure: force exerted over an area of surface • Air Density: # of air molecules in a given space/volume

  15. Atmospheric Layers • Air pressure & density decr w/ elevation • Temp has complex vertical profile • Lapse Rate: temp decr due to sunlight warming earth’s surface, then surface warms air above it • ~3.6°F per 1000ft rise • Temp inversion: air temp incr w/ height

  16. Remembering the Layers… • The • Science • Monkey • Took • Earth • Troposphere • Stratosphere • Mesosphere • Thermosphere • Exosphere

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