How does waterfall not run out of water?

The sun is the ultimate source of water in waterfalls. The sun causes the water in the oceans to evaporate. It deposits on higher elevations above sea level as rain, snow, sleet, or other precipitation. Eventually, all of this water will get back to the oceans.



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Sometimes rivers dry up. But generally most rivers (and waterfalls by extension) stay fairly constant because, yes, the precipitation maintains the water flow. If that wasn't true, then the water would just be magically appearing, which I can assure you it is not.

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The energy of flowing river water comes from the force of gravity, which pulls the water downward. The steeper the slope of a river, the faster the river moves and the more energy it has. The movement of water in a river is called a current. The current is usually strongest near the river's source.

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Angel Falls, Venezuela Beginning with the one that is the tallest uninterrupted waterfall, at the height of 3,200 feet, Angel Falls is the largest waterfall in the world.

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