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Dynamic Earth 1.2
lesson 2 weathering
| Term | Definition |
|---|---|
| weathering | the breakdown of rock material by physical and chemical processes |
| physical weathering | the process by which rock is broken down into smaller pieces by physical changes |
| abrasion | the breaking down and wearing away of rock material by the mechanical action of other rock |
| contract | a decrease in size |
| ice wedging | water seeps into cracks in the rocks and expands as it freezes until the rock breaks apart |
| exfolation | the process by which the outer layers of rock slowly peel away due to pressure changes |
| animal action | animals cause physical weathering when they dig and allow rocks to be exposed |