Daily Routine Sit in your appropriate seat quietly

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Daily Routine Sit in your appropriate seat quietly

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Presentation transcript:

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

Can we predict the weather Relative Humidity

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

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

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

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

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

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