The alternate heating and cooling of a rock causing sheet like fractures. excava

Question

The alternate heating and cooling of a rock causing sheet like fractures. excavation by any animal. the forcing apart of cracks in rocks by roots. Thermal expansion is... natural cracks that form in rocks due to removal of overburden or cooling (reductions in pressure and temperature). the forcing apart of rocks along cracks, by water when it freezes. the forcing apart of rocks along cracks by salt crystals. the alternate heating and cooling of a rock causing sheet like fractures. excavation by any animal. the forcing apart of cracks in rocks by roots.

Explanation / Answer

Thermal Expansion is...

Answer: THE ALTERNATE heating and cooling of a rock causing sheet like fractures.

EXPLANATION: Thermal expansion is similar to WEATHERING where the rock is heated to a great extent from sunlight which results to EXPAND and later is cooled during night times causing to CONTRACT. After this continuous process repeated for many number of times, this causes stress in the rock and finally FRACTURES and break.

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