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Weather - PowerPoint PPT Presentation


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Weather. What is weather?. Weather is a state of the atmosphere (troposphere) at a specific time and place, determined by factors including: Air pressure Humidity Temperature wind. Humidity. The amount of moisture in the air. How much water is there in the air?. Relative Humidity.

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Presentation Transcript
what is weather
What is weather?
  • Weather is a state of the atmosphere (troposphere) at a specific time and place, determined by factors including:
    • Air pressure
    • Humidity
    • Temperature
    • wind
humidity
Humidity
  • The amount of moisture in the air.
  • How much water is there in the air?
relative humidity
Relative Humidity
  • The amount of moisture in the air compared with the amount it can hold
  • Measured in percent from 0 to 100%
  • (Humidity / Amount it can hold) x 100
dew point
Dew Point
  • The temperature at which the air is saturated (100%) and condensation forms.
  • Example: water on the side of your pop can.
slide6
Fog
  • A cloud that is formed when air is cooled and it’s dew point is near the ground
temperature
Temperature
  • The average kinetic energy.
evaporation
Evaporation
  • When water changes from liquid to gas.
condensation
Condensation
  • When water changes from gas to liquid
precipitation
Precipitation
  • Water falling from clouds.
  • Includes:
    • Rain
    • Sleet
    • Hail
    • Snow
  • When clouds become saturated
clouds
Clouds
  • Condensation of water in the atmosphere
barometric pressure
Barometric Pressure
  • The force of air molecules pushing down
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