A type of mechanical weathering involves plant roots growing into rock cracks and prying the rock apart.

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This type of mechanical weathering is called biological weathering, and it involves the actions of plants and animals breaking down rocks through physical processes. Plant roots growing into rock crevices and expanding as they absorb water is a common example of biological weathering. Eventually, the roots pry apart the rock, creating more cracks for other plants or animals to exploit.

A Type of Mechanical Weathering Involves Plant Roots Growing into Rock