Science Study Guide Weather Unit

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Science Study GuideWeather Unit

• By Ms. Lawson
• 10-29-03

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Vocabulary to Know

• Precipitation- Rain, sleet, hail, snow, or
  freezing rain.
• Condensation- The change of gas to a liquid.
• Evaporation-The change of a liquid to a gas.
• Water Cycle- A never-ending cycle of water
  (evaporation, condensation, and precipitation)

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More Vocabulary

• Barometer- an instrument used to measure air
  pressure.
• Anemometer- an instrument used to measure wind
  speed.
• Weather (or wind) vane- an instrument used to
  measure wind direction.

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Still More Vocabulary

• Air Pressure- the weight of the air that is
  always pressing down on earth.
• Atmosphere- a thin layer of air surrounding the
  earth.
• Troposphere- the layer of the atmosphere that
  contains all weather.
• Weather- the condition of the air around the
  earth.

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Important Information

• Weather is determined by the air or the
  atmosphere around the earth.
• Weather happens in the troposphere.
• When temperatures are warm, the mercury in a
  thermometer rises. When temperatures are cold,
  the mercury in a thermometer drops.

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More Information

• Apparent Path- is the direction that a warm front
  or a cold front will probably take.
• Warm fronts and high pressure bring good weather
  and warmer temperatures. They usually bring fair
  weather.

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More Information

• Cold fronts and low pressure bring bad weather,
  cooler temperatures, and usually precipitation.
• When warm air meets cooler air, a thunderstorm
  will usually occur, especially in the summer
  months.

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Open Response Questions

• Water is a form of matter. Matter exists in
  different states. Using this information,
  describe and illustrate the water cycle.

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Test Dates!

• 1st and 2nd periods Your test will be on
  Thursday, January 27th, 2005
• 3rd, 4th, 5th periods- Your test will be on
  Friday, January 28th, 2005