What is Weather?
Local Weather
Investigation 1: Part 2
Weather Report
• Write a description of
the current weather
• What type of
information did you
include?
Professional Reports
Temperature
Forecast
Cloud
conditions
Pressure
Humidity
Visibility
Wind Speed
Direction
Your Description
• Your descriptions probably:
– Were more descriptive.
– Did not include actual measurements.
Weather Vocabulary
(Add definitions to your Interactive Notebook.)
• Temperature - how hot or cold the air is
• Humidity - the amount of water vapor in the
air
• Wind direction - the compass direction from
which the wind is coming
• Wind speed - how fast the air is moving
past a measuring point
Weather Vocabulary
• Pressure - the force of the air pushing in all
directions
• Visibility - the distance one can see through
the air
Thermometer - measures
temperature
Barometer - measures air
pressure
Anemometer - measures
wind speed
Wind vane measures wind
direction
Hygrometer measures humidity
Visibility
• How far you can see
• Weather factors might limit visibility?
– Fog, clouds, haze, smog, rain, snow, dust
• Determine visibility?
– View distant landmarks
Units for Measurements
•
•
•
•
•
Temperature - degrees Celsius ˚C or F
Pressure - millibars (mb)
Humidity - percent %
Wind speed - mph or km/h
Wind direction - the direction from which
the wind is coming (N, S, E, W)