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Definitions (1623)
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abiotic
Non-living thing. Usually refers to the physical and chemical components of an organism's environment. Also called inorganic.
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ablation
Surface removal of ice or snow from a glacier or snowfield by melting, sublimation, and/or calving. Ablation Zone Region in a glacier where there is a surface net removal of snow and/or ice by melti [..]
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abrasion
Physical wearing and grinding of a surface through friction and impact by material carried in air, water, or ice.
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absolute humidity
Measurement of atmospheric humidity. Absolute humidity is the mass of water vapor in a given volume of air (this measurement is not influenced by the mass of the air). Normally expressed in grams of w [..]
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absolute zero
Temperature of -273.15° Celsius. At this temperature atomic motion stops.
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absorption
(1) Process of taking in and being made part of an existing amount of matter. (2) Interception of electromagnetic radiation or sound.
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absorption
Atmospheric absorption is defined as a process in which solar radiation is retained by a substance and converted into heat energy. The creation of heat energy also causes the substance to emit its own [..]
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abstract space
Geographic model or representation of the real world. For example, maps and globes are abstractions of the real world or concrete space.
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abyssal fan
Fan shaped accumulation of sediment from rivers that is deposited at the base of a submarine canyon within a ocean basin.
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abyssal plain
Another name for ocean floor.
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