Tuesday 13 September 2016
Did you know that there is the same amount of water on the earth today as when the earth was created. Water is very important for the survival of plants, animals and human beings. I will provide you with an explanation on how water is recycled.
The water cycle is also call hydro logical cycle. This includes precipitation, evaporation, condensation and transpiration. Water changes from liquid, vapor and then back to liquid again.
Firstly water from the lakes, rivers, streams and sea is heated by the sun and then evaporates. When it evaporates, it forms clouds by a process called condensation.
When the clouds become heavy it falls down as rain assisted by gravity. If it falls down in solid form, it is snow or sleet.
The water reaches the ground and flows across the land until it reaches rivers, lakes streams and the sea. Some of the water also sinks into the ground.
The water cycle begins all over again by evaporation. ]
Glossary.
Precipitation: The action or process of precipitating a substance from a solution.
Evaporation: Is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure
Condensation: Water which collects as droplets on a cold surface when humid air is in contact with it.
Transpiration: Is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere.
Yes, Sarah. I am glad that you realise how important water is for our survival. It is our most precious commodity. I would like you to recall the meaning of the words you included in the glossary.
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