The growth of tree roots is chemical, wedging(?), pushing thru the ground(?), would be a physical change.
No, it is a physical change for both the rock and the trees.
chemical weathering
No. Root wedging is a form of mechanical weathering.
physical
Frost wedging is classified as mechanical weathering, but does open up rock to further surface attack by chemical weathering.
mechanical
frost wedging
No, it's a purely mechanical action.
Frost wedging, Apex
Ice wedging would help slow chemical weathering and make the soil more fertile.
It helps to breakdown rocks without affecting their chemical composition or altering their minerological properties.
Ice wedging is physical weathering. As water freezes it grows, so when water flows into cracks or holes and then freezes it causes the water to expand, which brakes apart whatever it seeped into.
such as rain and sleet and snow,