The fact that water expands as it cools and freezes is an important physical weathering process.

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When water freezes, it expands by about 9%, which can create significant physical stress on the surrounding rocks or soil. This process, known as freeze-thaw weathering or frost action, can break apart rocks and cause them to weather over time, contributing to erosion and the formation of soil. Thus, the fact that water expands as it cools and freezes is an important physical weathering process.

The Fact That Water Expands as It Cools and Freezes