Question

Select the statement(s) that best describe what happens during physical and chemical weathering.

Chemical weathering is when the rocks or minerals react chemically with air or water to form new substances.

Physical weathering occurs when rocks and minerals are broken down by wind, water, ice, living things, and temperature or pressure changes.

Physical weathering is the physical breakdown of rocks and minerals.

Chemical weathering is the breakdown of rock by chemical processes.

Physical weathering occurs when materials go through oxidation, breaking down and dissolving rocks in contact with acids.

Answer 1

Correct statements: 1, 2, 3, and 4.

- 1 (correct): Chemical weathering involves chemical reactions with air, water, acids, etc., that form new substances.
- 2 (correct): Physical (mechanical) weathering breaks rocks by wind, water, ice, plants, and temperature/pressure changes.
- 3 (correct): That is a concise definition of physical weathering.
- 4 (correct): That is a concise definition of chemical weathering.

Incorrect statement: 5. Oxidation and dissolution by acids are chemical weathering processes, not physical.