plant roots grow into cracks in rocks
yes
By weathering.
roots penetrate into small cracks in rocks and they grow thy exert pressure on rocks breaking them
Plants can break down large rocks into smaller pieces through a process called physical weathering. Plant roots can grow into cracks in rocks and expand as the plant grows, exerting pressure and causing the rock to break apart. This can help to create soil for the plant to grow in.
The process you are referring to is called weathering. It is the breaking down of rocks into smaller pieces by physical (e.g. water, ice) or chemical (e.g. acids from plants) means.
Sediment.
Yes, rocks can break into smaller pieces through processes like weathering and erosion. These smaller pieces can then undergo compaction and cementation to form new rocks through the process of lithification.
You smash a rock with a bigger rock
Emotional stress
erosion
Sedimentation
Yes, weathering weakens rocks, sometimes to the point where they break into smaller pieces.