Weather Facts

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Weather Facts

• Quiz Review

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Chapter 1- Properties of Air

• Gas that makes up 78 of Earths atmosphere
• Percentage of Oxygen in Earths atmosphere
• Mass per volume
• Units of air pressure
• As air density increases, air pressure

• nitrogen
• 21
• density
• millibars
• increases

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Chapter 1- The Atmosphere

• Stratosphere substance that protects Earth from
  UV radiation
• Warmest layer
• Layer that reflects radio waves

• ozone
• thermosphere
• ionosphere

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Chapter 2- Water in the Atmosphere

• Compares a wet-bulb and dry-bulb temperature
• Point when clouds form
• Used to measure relative humidity
• Rising warm air transports heat by
• Surface water becomes water vapor

• relative humidity
• dew point
• psychrometer
• convection
• evaporation

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Chapter 2-The Atmosphere

• Why the sky is blue
• Direct transfer of energy from the sun to the
  Earth
• Northern Hemisphere winds that blow from
  southwest to northeast

• scattering
• radiation
• prevailing westerlies

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Vocabulary

• Condition of Earths atmosphere at a particular
  time and place
• Instrument that measures air pressure without a
  liquid
• Force pushing on an area or surface
• Form of oxygen with three atoms instead of two

• weather
• aneroid barometer
• pressure
• ozone

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Vocabulary

• Elevation above sea level
• Layer of gases surrounding the Earth
• Instrument that uses mercury to measure air
  pressure
• Water in the form of a gas

• altitude
• atmosphere
• mercury barometer
• water vapor

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Whats Happening Now

• Eisenhower Weather Station
• NOAA Weather Maps
• Tropical Weather

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Study!