Which of the following is NOT an example of physical weathering

Question

Plant roots grow into gaps in rocks and force the gaps wider

Acid reacts with certain types of rock causing the rocks to break down

Water seeps into cracks in rocks, freezes, and expands

Wind slowly scrapes away small particles of rock

Answer 1

The option that is NOT an example of physical weathering is:

Acid reacts with certain types of rock causing the rocks to break down.

This process is an example of chemical weathering, as it involves chemical reactions that change the composition of the rock. In contrast, the other examples (plant roots, freeze-thaw cycle, and wind erosion) involve physical processes that break rocks apart without changing their chemical composition.