Answer:
The turning of the Earth results in the Coriolis Force. In the Northern Hemisphere this force causes pressure gradient wind to curve rightward, and in the Southern Hemisphere it causes pressure gradient wind to curve leftward.
Examples:
A southerly (out of the south) wind in the Northern Hemisphere would become a southwesterly (out of the southwest) wind because of the Coriolis Force.
A southerly (out of the south) wind in the Southern Hemisphere would become a southeasterly (out of the southeast) wind in because of the Coriolis Force.