By weathering.
yes
plant roots grow into cracks in rocks
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.
Emotional stress
You smash a rock with a bigger rock
erosion
Sedimentation
Yes, weathering weakens rocks, sometimes to the point where they break into smaller pieces.
Rocks break into smaller pieces through weathering processes such as freezing and thawing, chemical weathering, and biological activity. These smaller rock fragments can then be transported by water, wind, or ice to form sediment.
Sediment.
weathering