Lake-types

Lake types







    Lakes are formed when water fills hollows in the landscape. Most lakes contain fresh water, though they can also be salty. Theyrange in size form pondes to large lakes and eveninland seas. The depressions lakes fill are formed in various ways and may be millions of years old or newly man-made. Lakes are not permanent they can gradually disappear as layers of sediment build up in them.
Rivers

  When rain falls, the water drains from high ground to lower ground. Small channels of water join up, forming streams and rivers that flow into the sea or filldips in the landscape to create lakes. The shape and character of a river varies they are fast and narrow at their source and get steadily wider and slower towards the mouth.