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| The part of the earth where life exists. |
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| Thick middle later of the earth's interior structure, consisting of dense, hot rock. |
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| The removal of salt from sea water to make it useable for drinking and farming. |
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| Permanentaly frozen later of soil beneath the surface of the ground. |
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| The watery areas of the earth, including oceans, lakes, river, and other bodies of water. |
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| A celestial body, observed only in that part of its orbit that is relatively close to the sun. |
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| A process by which mountains can form as sea plates dive beneath continental plates. |
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| Piles of rocky debris left by melting glaciers. |
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| A frequently windless area near the equator. |
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| Facing toward the direction from which the wind is blowing. |
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| Trees, usually broad leaved such as oak and maple, that lose thir leaves in autumn. |
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| Surface land areas of the earth's crust, including continents and ocean basins. |
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| Any of the four planets, Mercury, Venus, Earth, or Mars, that are nearest the sun and have similar size and density. |
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| A slow process in which a sea plate slides under a continental place, creating debris that can cause continents to grow outwards. |
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| A crack or break in the earth's crust. |
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| Fine, yellowish-brown topsoil made up of particles of silt and clay, usually carried by the wind. |
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| Underground water-bearing layer of porous rock, sand, or gravel. |
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| Facing away from the direction from which the wind is blowing. |
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| Type of vegetation made up of dense forests of shrubs and short trees, common in Mediterranean climates. |
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| Trees that have cones and needle-shaped leaves, including may evergreens that keep their foliage throughout the winter. |
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