Chapter 22 Section 2 Review
Page 560
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
waves.
• 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
surface.
• 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. 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
peak.
•
The End???
“You should have seen the one that got away”