Describe the effects of wind.

Description should include the following:

• Wind is a mass of air moving over the surface of Earth in a definite direction.
• When the wind is blowing from the north at 25 knots, it simply means that air is moving southward over Earth’s surface at the rate of 25 nautical miles (NM) in 1 hour.

PLT198

Process/Skill Questions:

• How does a windsock move?