۱۳۹۰ آذر ۱۰, پنجشنبه

چرخه ی آب در طبیعت A Multi-Phased Journey


 A Multi-Phased Journey
The water, or hydrologic, cycle describes the pilgrimage of water as water molecules make their way from the Earth’s surface to the atmosphere and back again, in some cases to below the surface. This gigantic system, powered by energy from the Sun, is a continuous exchange of moisture between the oceans, the atmosphere, and the land.

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