Answer:

A. Physical, or mechanical, weathering happens when rock is broken through the force of another substance on the rock such as ice, running water, wind, rapid heating/cooling, or plant growth. Chemical weathering occurs when reactions between rock and another substance dissolve the rock, causing parts of it to fall away.

B. Weathering is the process of decomposing, breaking up, or changing the color of rocks. ... So, if a rock is changed or broken but stays where it is, it is called weathering. If the pieces of weathered rock are moved away, it is called erosion.

Answer:

Physical weathering is a breakdown of rocks caused by human activities,force, temperature or pressure while chemical weathering occurs when an another substance reacts and dissolves the rock.

Weathering is the breakdown or decomposition of rocks. Erosion occurs when rocks moved from one place to another.