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Geography
The study of physical characteristics of earth and the distribution and effects of life on earth, especially that of humans.
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Geography > Physical geography 
gravel
Geography; Physical geography
A loose mixture of pebbles and rock fragments that are coarser than sand.
extending flow
Geography; Physical geography
In a glacier, when gradient becomes steeper and ice accelerates and becomes thinner.
eruption
Geography; Physical geography
The escape of gases, steam and lava from within the crust to the surface or into the atmosphere. May be explosive enough to also send pyroclastic material, such as rocks and dust, ...
neap tide
Geography; Physical geography
A low tidal range caused when the angle of a line drawn from the sun to the earth and then to the moon is 90- in this twice-monthly situation the gravitational pulls of sun and ...
feedback
Geography; Physical geography
In a system, an output which causes changes to that system inputs. Two kinds:
nivation
Geography; Physical geography
The expansion of a hollow through freeze-thaw under a patch of snow and the subsequent washing out of the debris by meltwater.
esker
Geography; Physical geography
A low, winding ridge of fluvioglacial deposits which have been laid within sub-glacial channels, therefore found running along the floor of glacial valleys.
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