Physical weathering | Chemical weathering |
Physical weathering is the breaking down of rocks into smaller pieces. | Chemical weathering involves the breaking down of minerals in a rock into new minerals. |
It is a mechanical and physical process. | It is a chemical process. |
The nature of the rocks is not changed by physical weathering. | The nature/chemical composition of rocks is altered by chemical weathering. |
Frost, growing plant roots, animals etc. are all agents of physical weathering. | Water is the main natural agent of chemical weathering. |