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Weather
Term | Definition |
---|---|
Atmosphere | A mixture of gases that surrounds a planet or moon. |
Air Pressure | The measure of the force with witch air molecules push on a surface. |
Wind | The movement of air caused by differences in air pressure. |
Global Winds | The combination of cells found at every 30* of latitude. |
Land Breeze | |
Air over land is cooler and forms an area of high pressure. | |
Sea Breeze | |
Air over the ocean is cooler and forms an area of high pressure. | |
Coriolis Effect | The apparent curving of the path of a moving object from an otherwise straight path due to the Earths rotation. |
Air mass | A large body of air where temperature and moisture content are constant throughout. |
Continental | Forms over land. |
Maritime | Forms over water. |
Tropical | Develops over the Tropics. |
Polar | Forms over the polar regions. |
Cold front | Forms where cold air moves under warm air. |
Warm front | Forms where warm air moves over cold air. |
Occluded Front | Forms when a warm air mass is caught between two colder air masses. |
Stationary Front | Forms when a cold air mass meets a warm air mass. |
Hurricane | A severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensely low-pressure storm center. |
Thunderstorm | A usual brief, heavy storm that consist of rain, strong winds, lightning, and thunder. |
Tornado | A destructive rotating column of air that has very high wind speeds, is visible as a funnel-shaped cloud, and touches the ground. |
Lighting | An electric discharge that takes place between two oppositely charged surfaces, such as between a cloud and the ground, between two clouds, or between two parts of the same cloud. |
Greenhouse effect | The warming of the surface and lower atmosphere of Earth that occurs when water vapor, carbon dioxide, and other gases absorb and reradiate thermal energy. |
Polar Easterlies | Prevailing winds that blow from east to west between 60 degrees to 90 degrees latitude in both hemispheres. |
Westerlies | Prevailing winds that blow from west to east between 30 degrees and 60 degrees latitude in both hemispheres. |
Trade winds | Prevailing winds that blow northeast from30 degrees north latitude to the equator and that blow southeast from 30 degrees south latitude to the equator. |