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Lesson on Wind
In this lesson we are going to learn about the wind direction and strength and the instruments used to measure this aspects of wind

Answer Text:
Wind
Direction

Wind direction is determined using wind vane.
How It Works
• As the wind blows the arrow swings.
• The arrow points in the opposite direction of the wind flow.
• The direction is read from the cardinal compass points.
• The arrow will point in the direction from which the wind is blowing.
• For instance if it points S the wind is blowing from S towards N.
Wind Sock

- Used to indicate the general direction of wind flow.
- Not kept in a weather station because it doesn’t give the accurate direction of wind flow.
- Seen near airstrips for the benefit of pilots. How it Works
• When wind blows the bas stretches out in the direction that the wind is blowing.
Wind speed/Velocity

- Measured using anemometer. How It Works
• When wind bows hemispherical cups rotate.
• The number of rotations is obtained from the metre on the lower part of the anemometer.
• The units for measuring wind are called knots.