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| on of seven large landmasses on the earths surface |
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| a large rigid section of the Earth crust that is in constant motion. |
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| a sudden movement of the earth's crust followed by a series of shocks. |
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| a zone of volcanoes around the pacific ocean. |
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| an opening in the earth's crust from which molten rock ash and hot gases flow or are thrown out. |
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| the gradual physixcal and chemical breakdown of rocks on the earth's surface. |
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| the wearing away and movement of weathered materials by water,wind or ice. |
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| pieces of rock in form of sand stone or silt deposited by wind, water or ice. |
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| a large slow moveing mass of ice. |
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| the area drained by a major river. |
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| water found beneath the earth's surface. |
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| the circulation of water between the earth the ocean and the atmosphere. |
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| a feature onthe earth's surface formed by physical force. |
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| a broad flat area of land higher then the surrounding land. |
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| the difference in the eleation of a landform from it's lowest point to it's highest point. |
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| the submerged land at the edge of a continent. |
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| the layer of gases that surround the earth. |
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| the time during the year when the sun reaches the farthest northern or southern point inth sky. |
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| one of the two times a year when the sun's rays are over the equator and days and nigh around the world are equal in length. |
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| the condiation of the earth's atmosphere at a given time and place. |
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| the typicalweather conditions of a region over a long period of time. |
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| falling water droples in the form of rain,snow sleet or hail. |
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| an area that has similar plants. |
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| a vegetion region with a mix of grassland and scattered trees |
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| a region with plants specially adapted to dry condition. |
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| an increase in the average temperature of the earths atmosphere. |
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| the trapping of the suns heat by gases of the earth atmosphere. |
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| any gas in the atmosphere that contributes to the greenhouse effect. |
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| fuels such as coal, oil and natural gas. |
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| the processin which farmland becomes less productive becausethe land is degraded. |
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| using natural resources in a a way that exist for future generations |
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| a gas composed of carbon and oxygen |
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| substances discharged into the air |
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