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I am attaching a picture of an example of mechanical weathering.  We can observe a physical change in the floor.  Weathering is the breaking down rocks and minerals on surface. Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. Water, acids, salt, plants, animals, and changes in temperature are all agents of weathering and erosion.  As we know this is a progressive process that gets worst during time.

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I believe that everyone can see something like this in their own area. But here in El Paso we can see it a lot.

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These are some materials that I found that have been affected, a can and stairs. Chemical weathering changes the molecular structure of rocks and soil. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve metal.  That is the case of these two objects.

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This is a trail were we could observe how some sand and rocks were going down hill with time.

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Mass wasting is the movement of rock and soil down slope under the influence of gravity. In this picture we can observe how some dirt is going down hill .

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Stair an example of chemical weathering since it is located outside.