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Activity Time: One day
Recommended Grades: 1 - 8
Objective: Make observations of water expansion when frozen and its impact on moist soils.
Water plays a significant role in weathering and erosion of Earth’s surface. As water freezes, it expands, producing frost heaving of natural and manmade surfaces. Repeated cycles of freezing and thawing throughout the winter increase the amount of weathering, breaking up some surfaces—including pavement.