Geography 2.0 / 5 based on 1 rating ? GeographyGCSEAQA Created by: Danni KayCreated on: 05-02-13 13:39 Mechanical Weathering Is the breakdown of rock without changing its chemical composition. 1 of 6 Mechanical Weathering:- The process of Freeze-Thaw weathering. 1.It happens when the tempreture alternates above and below 0 degrees. 2 of 6 Mechanical Weathering:- The process of Freeze-Thaw weathering 2. Water gets into rock that has cracks eg; granite. 3 of 6 Mechanical Weathering:- The process of Freeze-Thaw weathering 3.When water freezes it expands, which puts pressure on the rock. 4 of 6 Mechanical Weathering:- The process of Freeze-Thaw weathering 4. When the water thaws it contracts, which releases the pressure on the rock. 5 of 6 Mechanical Weathering:- The process of Freeze-Thaw weathering Repeated freezing and thawing widens the cracks and causes the rock to break up. 6 of 6
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