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Name three main sources of water on earth?

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Rainwater, oceans, rivers, lakes, streams, ponds and springs are natural sources of water. Dams, wells, tube wells, hand-pumps, canals, etc, are man-made sources of water. Rain Water: Rain water collects on the earth in the form of surface water and underground water (Fig. 8.1). Surface Water: Water present on the surface of the earth in the form of oceans, rivers, lakes, ponds and streams is called surface water. read more

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Kids Science -- Learn About the Sources of Water - YouTube
Source: youtube.com