Tell the class that in nature water frozen in a rock acts like a wedge forcing the rock to break apart and weather.
(nature water; frozen; L:in a rock) (the class; acts; like a wedge) (a wedge; forcing; the rock; to break apart and weather) (the rock; to break; apart)
nature water the class a wedge the rock
frozen acts forcing to break
L:in a rock
like a wedge
the rock to break apart and weather
apart