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Prentice hall earth science chpt.18 Climate and climate change

Prentice hall>earth science>chapter 18>climate and climate change
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Climate
The average , year-after-year conditions of temperature, precipitation ,winds,and clouds in an area
Tropical zone
The area near the equator, between about 23.5° north latitude and 23.5° south latitude
Polar zone
The area near both poles, from about 66.5° to 90 north and 66.5° to 90° south latitudes
Temperate zones
The area between the tropical and polar zones, from about 23.5° to 66.5° north and 23.5° to 66.5° south latitudes
Marine climate
the climate of some coastal regions, with relatively warm winters and cool summers
Continental climate
The climate of the centers of continents, with cold winters and warm or hot summers
Windward
the side of the mountains that faces the oncoming wind
Leeward
The downwind side of the mountains
Microclimate
The climate characteristics of a small, specific area; it may be different from the climate of the surrounding area
Rain forrest
A forest in the tropical wet climate zone that gets plenty of rain all year
Savanna
A tropical grassland with scattered clumps of trees; found in the tropical wet-and-dry climate zone close to the equator
Desert
a region that receives less than 25 centimeters of rain a year
Steppe
A prairie or grassland found in the semiarid climate region
Humid subtropical
a wet and warm climate found on the edges of the tropics
Subarctic
a climate zone that lies north of the humid continental climate zone, with short, cool summers and long, bitterly cold winters
Tundra
a polar climate region, found across northern Alaska, Canada, and Russia, with short , cool summers and bitterly cold winters
Permafrost
permanently frozen soil found in the tundra climate region
Ice ages
Cold time periods in Earth's history, during which glaciers covered large parts of the surface
Sunspot
Dark, cooler regions on the of the sun
Greenhouse gas
an atmospheric gas that traps heat
Global warming
an increase in the average temperature of the earth's atmosphere
Chlorofluorocarbons
Chloride compounds formerly used in air conditioners , refrigerators, and spray cans; also called CFCs