water cycle

The Water Cycle in Nature

Water cycle through the biosphere in the manner is described in the figure below. Freshwater is distilled from salt water. The sun's rays cause fresh water to evaporate from sea water and the salts are left behind. Vaporized fresh water rises into the atmosphere, cools and falls as rain over the oceans and the land. A smaller amount of water also evaporates from bodies of fresh water. Since land dies above sea level, gravity eventually returns all fresh water to the sea, but in the meantime, it is contained within the standing water bodies such as lakes and ponds, flowing water (streams and rivers) and groundwater.
When rain falls, some of the water sinks or percolates into the ground and saturates the earth to a certain level. The top of the saturation level is called the groundwater table or simply the water table. Ground water is also sometimes located in a porous layer, called an aquifer that lies between two sloping layers of impervious rock. Wells can be used to extract some of this water for human consumption.

السلام عليكم ورحمة الله وبركاته:
الموضوع رائع ويبدو انك شاطر في العلوم والى الامام ولاكن يا اخي لديك كلمة خطىء سوفة اوضحها للكل الي يريد ان يقراها ولم يفهمها لقد كتبت (since) وهي (science) وشكرا

بدون تعليق...............

بدون تعليق...............