water is a kind of substance & freezing means a substance changes from a liquid into a solid by decreasing heat energy ->  water freezing means water changes from a liquid into a solid  water freezing means water changes from a liquid into a solid & water is in the solid state , called ice ->  water freezing means water changes from a liquid to ice  water freezing means water changes from a liquid to ice & ice wedging is when ice causes rocks to crack by expanding in openings -> the ice formed by water freezing causes rocks to crack by expanding in openings