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As the water flow makes the rocks tumble against each other the high spots get chiped off. The tumbling and banging together with small grains of sand will smooth any rock over a long period of time. There must be enough water flow to keep the rocks moving for the process to work.

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โˆ™ 2006-08-26 11:48:23
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Earthquakes

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How often do meteorites hit Earth

The adjustments of materials that follow a major earthquake often generate smaller earthquakes called

Most earthquakes are produced by the rapid release of which kind of energy stored in rock subjected to great forces

What does an earthquake's magnitude measure

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Q: Why are pebbles in streams round?
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