Rivers flow because water moves from high places to low places, just like when you pour water from a tall glass into a short one. Over time, rivers change shape as they carry rocks and soil along the way, carving paths through mountains or depositing sand in valleys. Gravity is the big helper here, pushing the water forward, while erosion helps reshape everything it touches.
Examples
- When a river goes around a bend, it can erode the outside of the curve and deposit silt on the inside, shaping its path over time.
- After heavy rains, rivers may flood their banks, leaving behind layers of soil that make the land richer for plants.
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See also
- Why Do We Have Different Kinds of Weather?
- How Do Glaciers Move?
- Why Do Oceans Glow in the Dark?
- Why Do Trees Change Color in the Fall?
- Why Do Some Trees Lose Their Leaves in Winter?
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Categories: Environment · rivers,geology,hydrology