(When water seeps into cracks in rocks and then freezes with falling temperatures, it expands and forces the rock to break into smaller parts.
(water; seeps; into cracks in rocks) (the rock; to break; into smaller parts) (it; expands; T:When water seeps into cracks in rocks and then freezes with falling temperatures) (it; forces; the rock; to break into smaller parts; T:When water seeps into cracks in rocks and then freezes with falling temperatures)
water the rock it it
seeps to break expands forces
into cracks in rocks
into smaller parts
T:When water seeps into cracks in rocks and then freezes with falling temperatures
the rock to break into smaller parts T:When water seeps into cracks in rocks and then freezes with falling temperatures