Geographical Terms
Acid Rain : The name given to rain, snow or sleet contaminated with
acid substances so that its acidity is greater than the limit expected by
normal concentrations of carbondioxide dissolved in the rain to give carbonic
acid. The increased acidity is caused by larger concentrations of a number
of contaminants, particularly the strong acids, nitric and sulphuric which
arise from industrial effluents containing oxides, nitrogen and sulphur.
Alluvium : Sedimentary matter deposited by rivers. It makes the soil fertile.
Antipodes : It is a region or place on the opposite side of the earth.
Aphelion : The position of the earth or of any other planet or comet in
its orbit when it is at its greatest distance from the sun.
Archipelago : A group of islands,...