Download Erosion is the process by which the surface of the Earth gets worn

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Transcript
beach erosion
Erosion is the process by which the surface of the
Earth gets worn down. Erosion can be caused by
natural elements such as wind and glacial ice. But
anyone who has ever seen a picture of the Grand
Canyon knows that nothing beats the slow steady
movement of water when it comes to changing the
Earth.
The key to erosion is something called "fluid flow." Water, air, and even ice are fluids
because they tend to flow from one place to another due to the force of gravity. Of the
three, liquid water is the most common agent of erosion because there's so much of it on
the surface of the Earth.
Erosion happens at the tops of mountains and under the soil. Water and chemicals get
into the rocks and break them up through those mechanical and chemical forces. Erosion
in one area can actually build up lower areas. Think about a mountain range and a river.
As the mountain erodes, the river carries sediment downstream towards the ocean. That
sediment slowly builds up and creates new wetlands at the mouth of the river.
soil erosion
Grand Canyon
Soil deposit from Mississippi River.
The soil deposits forms a delta.
Mississippi River delta from space