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| the envelope of gases surrounding the earth or another planet. |
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| a line on a map joining points of equal height above or below sea level. |
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| a system which uses one or more numbers, or coordinates |
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| occupies less than 1% of Earth's volume. |
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| The interior structure of the Earth that is layered in spherical shells. |
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| height above a given level, especially sea level. |
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| an imaginary line on the Earth's surface equidistant from the North Pole and South Pole, deciding into north and south poles. |
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| an expanse of open or cleared ground, especially a piece of land suitable or used for pasture or tillage. |
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change in elevation
G=------------------
elevation |
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| all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds. |
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| A line on a map, chart, or graph connecting points of equal value. |
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| the angular distance of a place north or south of the earth's equator. |
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| the angular distance of a place east or west of the meridian |
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| he rigid outer part of the earth, consisting of the crust and upper mantle. |
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| A meridian is the half of an imaginary great circle on the Earth's surface, terminated by the North Pole and the South Pole, connecting points of equal longitude. |
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| a three-dimensional representation of a person or thing or of a proposed structure. |
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| Each layer is characterised by a uniform change in temperature with increasing altitude. In some layers there is an increase in temperature with altitude, whilst in others it decreases with increasing altitude. The top or boundary of each layer is denoted by a 'pause' where the temperature profile abruptly changes. |
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| a planet's meridian adopted as the zero of longitude. |
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| a type of map characterized by large-scale detail and quantitative representation of relief. |
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