What causes the cracks in rocks?



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    Cracks in rocks are a result of weathering, a process that produces a change in the surface of a rock. There are different types of weathering, including mechanical and chemical. However, mechanical weathering refers to the fragmentation of rocks, whereas chemical weathering refers to the alteration of rocks as they form new minerals. Plant action is a form of mechanical weathering. As plants grow, their roots spread into small cracks in the Earth. The expansion of the roots causes great stress and pressure, which ultimately leads to cracks in the rock. Ice is also a form of mechanical weathering. As water seeps into the rock, it freezes. The ice expands and forces the rock to break.

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