The water cycle

The water cycle is the movement of water through evaporation and precipitation. The water cycle is a closed system where no water is lost or gained. The same water has been circulating through the water cycle science the start of time.

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Types of precipitation

hydrosphere, discontinuous layer of water at or near the Earth’s surface. It includes all liquid and frozen surface waters, groundwater held in soil and rock, and atmospheric water vapour.

The formation of the earths oceans

National Geographic - History Of Earth's Oceans