How do freezing, thawing, wetting, and drying contribute to soil creep?
◦ Eventually, these cause the soil and regolith to suddenly slide down the slope.
◦ The soil becomes much weaker when dry and frozen.
◦ Gravity exerts a much stronger force when the soil is wet and thawed.
◦ The soil expands and contracts, lifting particles and dropping them a slight distance downslope.