Water freezes and thaws and breaks the rock into pieces....
Water freezes and thaws and breaks the rock into small pieces.

Although most rocks are strong
they can still break into pieces
from roots on plants and trees or water when it gets cold and freezes.
Too much pressure on the rocks;
they crack and break into smaller pieces.

Water freezes and thaws and breaks the rock into pieces....
Water freezes and thaws and breaks the rock into small pieces.

More natural processes that can cause rocks to break.
Fire makes rocks expand and outer layers crack and release.
Crystal salt formations widen cracks and loosen mineral grains.

Water freezes and thaws and breaks the rock into pieces....
Water freezes and thaws and breaks the rock into small pieces.