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• 1.Wind Causes Weathering and Erosion Wind causes weathering by blowing bits of material against cliffs and large rocks.

• 2.)Mechanical weathering, also called physical weathering and disaggregation, causes rocks to crumble.

• 3.)Temperature changes can also contribute to mechanical weathering in a process called thermal stress.

• 4.)Plants and animals can be agents of mechanical weathering. The seed of a tree may sprout in soil that has collected in a cracked rock.

• 5.)Animals can also contribute to weathering. Animals can walk on rock or disturb it, causing landslides that scrape or smooth rock surfaces.

• 6.)Weathering is a natural process, but human activities can speed it up. For example, certain kinds of air pollution increase the rate of weathering.

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• Weathering breaks down the Earth's surface into smaller pieces.
• Those pieces are moved in a process called erosion, and deposited somewhere else.
• Weathering can be caused by wind, water, ice, plants, gravity, and changes in temperature.

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