Weathering & Erosion

Kashish SMYP-1B

Weathering

• Weathering is when rain, sun, wind and frost constantly breakdown of the rocks.

Types Of Weathering

• Freeze thaw weathering• Onion skin weathering • Biological weathering • Chemical weathering

Freeze-Thaw Weathering

• This can also be called frost shattering. Water may get into the crack in a rock and freeze. As the water turns to ice it expands and causes the crack to open a little. When it thaws the ice melts and changes back to water.

Onion Skin Weathering

• This happens when the rock is repeatedly heated and cooled. As it is heated the outer layer of the rock expands slightly and as it cools the rock contracts. Continual expansion and contraction causes small pieces of rock surface to peel like the skin of and onion.

Biological weathering

• This due to action of plants and animals. Seeds may fall into cracks in the rocks where shelter and moisture help them grow into small plants or trees as the roots develop they gradually forces the cracks to widen and the rocks to fall apart. Animals such as rabbits moles and even earthworms can also help breakdown of the rock.

Chemical weathering

• It when is when acid rain happens

Erosion

• The process of eroding or being eroded by wind, water, or other natural agents.