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Weathering
Chemical and Physical weathering cause changes on Earth's Surfaces.
Term | Definition |
---|---|
weathering | is the breakdown of rock material by physical and chemical processes. |
Physical weathering | is the process by which rock is broken down into smaller pieces by physical changes. |
ice wedging | causes cracks in rocks to widen with repeated cycles of freezing and thawing. |
Exfoliation | is the process by which the outer layers of rock slowly peel away due to pressure changes. |
Animals | can cause physical weathering by digging burrows. |
Abrasion | can be caused by three agents of physical weathering which are moving water, wind, and gravity. |
Plant's roots | As they grow in small cracks in rocks, they put more pressure on the rock, causing the rock to expand and eventually break apart. |
Chemical weathering | is the breakdown of rocks by chemical reactions |
composition | Chemical weathering changes both the _____and appearance of rocks. |
Oxidation | is the process by which chemicals in rock combine with oxygen in the air or in water. |
Acids | in the atmosphere are created when chemicals combine with water in the air. |
Acid precipitation | occurs when strong acids fall to Earth as rain, sleet, or snow. |