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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 
pull factor
Geography; Physical geography
An attractive quality of a place which pulls migrants to it.
rossby waves
Geography; Physical geography
The wave-pattern of flow of the westerly winds which blow in the upper atmosphere. Thought to be the result of diversion of air flow around the rockies and andes, they change in ...
nutrient sink
Geography; Physical geography
An ecosystem which has a tendency to store organic matter and thus the nutrients within it. E.g. Peat bogs.
sea-floor spreading
Geography; Physical geography
The widening of an ocean basin by the creation of new crust at a divergent margin.
mid-oceanic ridge
Geography; Physical geography
An elongated range of undersea mountains formed by the extrusion of lava, combined with the upward pressure of a convection plume, at a divergent plate margin.
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