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1
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Is the transfer of energy across space and in the atmosphere.
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2
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The concentration of all the dissolved salts ocean water contains.
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3
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The layer beneath the crust that makes up 64% of the mass of the Earth.
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4
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The solid part of the Earth that consists of all rock, as well as the soils and loose rocks on Earth's surface.
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5
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The process in which gases trap heat near the Earth.
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6
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The narrow layer around Earth's surface in which life can exist.
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8
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The continuous movement of water into the air, onto land, and then back to water sources.
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12
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Earth's thin outer layer that is composed of almost entirely of light elements.
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15
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The transfer of heat by air currents.
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16
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A little more than 3% of all the water on Earth.
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18
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The removal and transport of surface material.
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19
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Extends to about 18 km above Earth's surface.
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20
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Is the flow of heat from a warmer object to a colder object when the objects are placed in direct physical contact.
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21
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Earth is surrounded by a mixture of gases known as the __________.
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