What are rivers?

Rivers are channels of fresh water that flow downhill toward a lake or ocean.they start as tiny stream,high up in hills or mountains.Rivers are very important because, many living things need fresh water to survive.

Importance of rivers:

Rivers provide water for washing and cooking, as well as drinking water.Farms use water to irrigate their crops and factories use tons of water everyday.people have relied on rivers for transportation for centuries, and they provide habitat for plants and animals.Rivers are also a source of power.The force of falling water from rivers and water falls can be used to produce electricity.

The water cycle:

Only three percent of the world's water is fresh,and most of is in frozen in ice caps and glaciers.

only one percent is available in rivers,lakes and underground.This small amount of water is constantly replace by the water cycle.

In the water cycle, the earth's water is constantly on the move.Water evaporates from rivers and oceans and turn into water vapor in the air. When it cools,it forms clouds of water droplets, which later fall as rain,snow or hail.Rivers carry the water down t lakes and oceans.They cycle is happening all the time.

Parts of a river:

The start or  source of a river is usually a tiny stream. As it flows downhill, the river gets bigger and slower, and is joined by other streams. These streams are called "THE RIVER TRIBUTARIES". The river wears away soil and carries it down stream.Lower down, the river floods and leaves mud flat on the ground beside the river. This is called the flood plain.