Wind the movement of air by differences in air pressure Air moves from areas of high pressure to areas of low pressure Air moves in small circular patterns called convection currents.

The Coriolis Effect the apparent curve of the wind due to the rotation of the Earth

Global Winds wind systems that occur at or near the Earth’s surface Three types – Polar easterlies – Prevailing Westerlies – Trade winds

Polar Easterlies Cold winds From the east Snow and freezing weather 60° - 90°

Prevailing Westerlies From the west Our winds Moist air – rain/snow 30° - 60°

Horse latitudes 30° N and S Calm winds

Trade Winds From the east Steady winds Reliable winds Sailors used them for trading between Europe and America

Doldrums 0° At the equator Calm winds

Jet Stream narrow belts of high-speed winds that blow form west to east high in Earth’s atmosphere Two types – Polar – Subtropical