The breaking down of rocks and other materials on the Earth's surface.

The breaking down of rocks and other materials on the Earth's surface.

• A. Weathering
• B. Erosion
• C. Silicates
• D. Mafic

Answer: (A)

Weathering is the process of breaking down rocks and other materials at or near the Earth's surface through physical and chemical changes, usually in place. Physical weathering, like freeze-thaw cycles or root wedging, splits rocks into smaller pieces without changing their chemical makeup. Chemical weathering, such as dissolution or oxidation, alters minerals and forms new substances like clay minerals and ions in solution. These processes operate where rocks are exposed to air, water, and organisms, preparing material for potential transport by other forces. Erosion would move the weathered material away, so it’s not about breakdown itself. Silicates and mafic refer to mineral types and compositions, not the process of breaking down rocks. So weathering best fits the description.

Weathering is the process of breaking down rocks and other materials at or near the Earth's surface through physical and chemical changes, usually in place. Physical weathering, like freeze-thaw cycles or root wedging, splits rocks into smaller pieces without changing their chemical makeup. Chemical weathering, such as dissolution or oxidation, alters minerals and forms new substances like clay minerals and ions in solution. These processes operate where rocks are exposed to air, water, and organisms, preparing material for potential transport by other forces. Erosion would move the weathered material away, so it’s not about breakdown itself. Silicates and mafic refer to mineral types and compositions, not the process of breaking down rocks. So weathering best fits the description.