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Daily Routine

Daily Routine. Sit in your appropriate seat quietly All back packs on the floor All cell phones away ID’s on or out on the desk All IPods off and headphones out of your ears Have all necessary materials out Hats off No food or drink except for water. Announcements.

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Daily Routine

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  1. Daily Routine • Sit in your appropriate seat quietly • All back packs on the floor • All cell phones away • ID’s on or out on the desk • All IPods off and headphones out of your ears • Have all necessary materials out • Hats off • No food or drink except for water

  2. Announcements • Quiz on Friday about the material we cover this week • Bring in empty 2L bottles for extra credit by Friday

  3. Can we predict the weather Relative Humidity

  4. Today we will • Demonstrate how to take relative humidity measurements using a handmade psychrometer • Calculate relative humidity and dew point • Describe what humidity is

  5. What is Humidity • The amount of water vapor in the atmosphere at any given location • Often given is percentages • Colder temperature can hold less water vapor • Warmer temperatures can hold more water vapor

  6. How does the atmosphere reach saturation of water vapor? • Water goes through different phase changes • Saturation = maximum capacity to hold moisture • Reached when evaporation > condensation • Volume of air and temperature have significant roles in atm. saturation levels

  7. How does saturation affect relative humidity? • Relative humidity is the amount of water vapor in the air • Relative amount of water vapor needed for the volume of air to reach saturation

  8. Describe what dew point is… • Amount of moisture content in the air • Measured by the temperature to which air is cooled at a constant pressure to reach saturation • If the dew point is close to the temperature outside = high relative humidity

  9. What device is used to measure relative humidity and dew point Psychrometer!

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