What is the change of rocks and minerals into smaller particles without a change in composition?

The change of rocks and minerals into smaller particles without a change in composition is known as mechanical weathering. This process involves physical forces such as freeze-thaw cycles, abrasion, and temperature fluctuations that break down rocks into smaller fragments. Unlike chemical weathering, mechanical weathering does not alter the mineral composition of the rocks, preserving their original materials while changing their size and shape.