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წყალმცენარეები

Fall into four categories. Emergents ( rooted in sediment and protrude above the surface), free-floaters, floating-leaved (rooted in sediment with leaves floating on the surface), and submergents.

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지리; 자연지리학

Fall in the percentage contribution of secondary industry to an economy in terms such as value of input to gdp and importance as an employment sector.

შესაბამისი ტექნოლოგია

지리; 자연지리학

See alternative technology. Appropriate technology might more commonly be the term applied to alternative technology originating externally.

დელტა

지리; 자연지리학

A depositional feature found at river mouths under certain conditions. Where the river enters the body of water (sea or lake) there is energy loss and load is deposited. If the ...

დენდროქრონოლოგია

지리; 자연지리학

Observation of a core or cross-section of a tree trunk shows a pattern of essentially concentric rings, each representing a year of growth. The number of rings can therefore be ...

კანიონი

지리; 자연지리학

A large-scale, steep-sided valley which is deeper than it is wide.

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지리; 자연지리학

Layer of gases surrounding earth and held there by gravity. Nitrogen forms 78.09% by volume and oxygen 20.95%. The remaining 0.96% is made up of a further 19 gases. The boundary ...