Question

which process is an example of chemical weathering?
○ iron in rocks rusting when exposed to oxygen
○ ice crystal formation in rock cracks
○ wind moving sand particles
○ rocks breaking due to temperature change

Explanation:

Chemical weathering involves chemical reactions that change the composition of rocks. Rusting of iron in rocks when exposed to oxygen is a chemical reaction (oxidation), forming a new substance (iron - oxide). Ice crystal formation, wind - moving sand, and rocks breaking due to temperature change are physical weathering processes.

Answer:

Iron in rocks rusting when exposed to oxygen