What is Weather? Investigation 1: Part 2 TG-P.48-50

Weather is the condition of Earth’s atmosphere at any given time in a given place.

Write a weather report: a brief description of the current weather.

Components of Weather What types of information are included in your weather report or forecast? Temperature ∙ Cloud Cover Humidity ∙ Predictions for future weather Wind Speed ∙ Visibility Wind Direction ∙ Air Pressure

Professional Reports Temperature Forecast Cloud conditions Wind Speed Pressure Humidity Direction TG-P.51 Visibility

Weather Reports & Forecasts www.weather.com www.NOAA.gov www.AccuWeather.com http://www.wunderground.com/ http://www.intellicast.com/ http://weather.cnn.com/weather/forecast.jsp TG-P.51

Weather Vocabulary Temperature - how hot or cold the air is Humidity - the amount of water vapor in the air Wind- the movement of air from a location of high pressure to area of low pressure so pressure equalizes Wind Direction - the direction from which the wind is coming Wind Speed - how fast the air is moving past a measuring point Pressure- the force of air pushing in all directions Visibility- the distance one can see through the air TG-P.51

Compass- used to determine the direction from which wind is coming Thermometer - measures temperature Barometer – measures air pressure Anemometer - measures wind speed TG-P.52 Wind vane - measures wind direction Hygrometer - measures humidity

Visibility Is how far you can see (maximum is 7 miles or 11 km) Weather factors that might limit visibility… Fog, clouds, haze, smog, rain, snow, dust Determine visibility? View distant landmarks (mountains, towers, buildings, etc) TG-P.52

Class Weather Chart What might be included in “Other Observations? TG-P.52 Special Teacher Masters-TG-P. 355 Clouds Precipitation Color/Shade of sky

Time to Go Outside Practice using tools For scientific investigation, not recreation Readings always made in same location Each group work with all tools Anemometer and compass used together

Units for Measurements _________ is measured in ________ Temperature - degrees Fahrenheit ˚F or Celsius ˚C Pressure - millibars (mb) Humidity - percent % Wind speed - mph or km/h (miles per hour) Wind direction - the direction the wind is coming from (N, S, E, W) TG-P.53

Record the Weather Observations Turn to the Class Weather Chart page in Inv 1 Record the data on your weather chart Student Lab Notebook - p.1