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Chapter 22 Section 2 Review Page 560

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									Chapter 22 Section 2 Review
         Page 560
          #’s 1-9
Earth’s Atmosphere
    1. Explain how radiant
    energy reaches Earth.

• Radiation from the sun travels
 through space in the form of
 electromagnetic waves.
  2. List and describe the
    types of electromagnetic

• Long wavelength: TV/radio waves,
 microwave, infrared, and visible light
• Short wavelength: UV rays, X rays,
 Gamma Rays
Electromagnetic Spectrum
 3. Describe how gases and
    particles in the
    atmosphere interact with
    light rays.
• Nitrogen, oxygen, and ozone in the upper
  atmosphere absorbs most short
  wavelength radiation
•    CO2 and water vapor absorb infrared
  radiation in the lower atmosphere.
•     About 50% of visible light reaches
  Earth’s surface. Clouds, particulates and
  gases scatter and reflect much of the light.
Formation of OZONE
   4. Describe how visible
    light and infrared energy
    warm Earth.
• Infrared and visible light that reach
 Earth’s surface are absorbed. Heated
 surfaces radiate heat back into the
 air where greenhouse gases absorb
 some of the heat.
Infrared radiation
Infrared Images
    5. Explain how variations
    in intensity of sunlight
    can cause temperature
    differences on Earth’s
• Concentrated sunlight at the equator
 makes the surface hotter and at
 higher latitudes where sunlight is
 spread over a larger area the surface
 is cooler.
6. Summarize the processes
    of conduction and

• Conduction: transfer of heat energy
 by direct contact
• Convection: transfer of heat
 energy by movement of a heated
Conduction and convection
 7. Why do scientists study
    all wavelengths of the
• Earth is affected by all wavelengths
 of radiation in the spectrum.
8. Explain how fans in
    convection ovens help
    cook food more evenly.
• Fans mix the air so hot or cold spots
 are less likely to happen in the oven.
Convection Ovens
9. You decide not to be
    outside during the
    hottest hours of a
    summer day. When will
    the hottest hours
    probably be? How do
    you know?
• The hottest hours will probably be in the
 late afternoon when Earth’s surface has
 had time to absorb and reradiate energy.
 This is also when convection reaches its
•                The End???

    “You should have seen the one that got away”
10. Use the following terms to
   create a concept map.

    Electromagnetic waves,
   infrared waves,
   greenhouse effect,
   ultraviolet waves, visible
   light, scattering, and

Infrared Waves   Ultraviolet Waves                                     Visible Light

                                Scattering                Absorption
The End

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