Question

Lichen and moss are called soil formers. They help to form soil by ________________ large rocks and breaking them down into smaller pieces.
A) physically eroding
B) chemically faulting
C) chemically weathering
D) physically weathering

Answer 1

they help in physically weathering

Answer 2

Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface.