Pressure exerted in a gas reduces its volume and increases its density.
Differential heating of Earth’s surface by the Sun can create high and low pressure areas.
Wind is the movement of air from an area of high pressure to an area of low pressure.
Local winds, called sea breezes, land breezes, mountain breezes and valley breezes blow in predictable ways determined by local differential heating.
Wind speed is measured with an instrument called an anemometer.
Air pressure is represented in a map by contour lines called isobars.
