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Chapter 15: The Atmosphere youtube/watch?v=AkaY1dvZer4

Chapter 15: The Atmosphere youtube/watch?v=AkaY1dvZer4

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Chapter 15: The Atmosphere youtube/watch?v=AkaY1dvZer4

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  1. Chapter 15: The Atmospherehttp://www.youtube.com/watch?v=AkaY1dvZer4 Section 1 : characteristics

  2. What is the Atmosphere?? • It is a mixture of gases that surround Earth • It is always changing • Made up mostly of Nitrogen, with Oxygen in 2nd place. Following is argon, Carbon Dioxide, water vapor and other gases.

  3. Pressure and Temperature • Pressure: force of which the air particles push on a surface • Ears pop, human pyramid example • Altitude: height of an object above Earth’s Surface • As altitude increases, pressure decreases • Temperature varies between colder and warmer, due to gases contained in the different layers

  4. Layers of the Atmosphere • Four (Troposphere, Stratosphere, Mesosphere, thermosphere)

  5. Troposphere • Lies next to earth’s surface, lowest one • 90% of atmosphere’s total mass • All of earth’s “stuff” found here

  6. Stratosphere • Right above troposphere; air very thin, little moisture, extremely cold • Has OZONE---3 oxygen molecules and absorbs solar energy in the form of UV which warms the air and protects our surface

  7. Mesosphere • COLDEST LAYER: BRRR • -93 degrees • Reach storm winds of 320 km/hr.

  8. Thermosphere • Uppermost layer • Can become very hot? ( 1, 700 degrees) • Difference between heat and temp: Particles just move very fast • Ionosphere: upper part of thermosphere- particles become negatively charged like IONS • Northern Lights, radio waves