Wednesday, 31 August 2016

Information report- water cycle

The water cycle is the process which recycles water and moves it from land, ocean and atmosphere. Another name for it is the hydrologic-cycle. There are four main steps in the cycle. These are Condensation, Precipitation, Runoff and Evaporation. The water cycle is a never ending cycle, which is good, as there are many uses for water, such as domestic, recreational and industrial, to name a few.

When the sun's energy is applied to water, water (that was previously a liquid in oceans, lakes and rivers) changes state and rises up into the atmosphere as a gas: Water vapour. The reason this happens is because the sun’s heat separates the waters molecules; they turn into gas. In some hot places, there is lots of water vapour in the air. This is called humidity. Usually snow melts before evaporating, however sometimes dry winds can suck up the moisture in snow or ice, which changes them directly into vapour. Once water vapour rises higher and begins to cool, it will form clouds;this is called condensation. 

When water vapour rises up the temperature gets colder, and it forms clouds which will eventually come down as precipitation. Water vapour-tiny droplets of water, condense on tiny particles of dust or dirt that rises up with the vapour. This forms clouds. Warm air rises, which is why water vapour is forced to rise. Although most clouds are made out of tiny water droplets, some high clouds are made out of ice particles. When clouds combine and become heavy, the water thickens to a liquid again, and you get Precipitation. Rain, hail, snow, all kinds of precipitation. On that note, it looks like it’s going to… It doesn’t matter, the sun just came out again. Once water returns to the ground, where does it go?

When water falls to the ground it either forms streams and river to flow to oceans and lakes, or sinks into the ground as groundwater. Snowmelt as another source of water in streams and rivers. Sometimes it can stay as a solid for months, before melting when temperatures rise which sometimes causes flooding. What is more, a large portion of the world's freshwater lies underground as groundwater. While it is underground water goes through aquifers: layers of soil, sand and rocks. This cleans the water. 

These steps move water and recycle the water. [People should take more care of it.] It is necessary to our survival.

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