Weather
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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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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.


Weather
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