Does expansion of water as it freezes into ice cause weathering or erosion?

Yes, the expansion of water when it freezes into ice can cause weathering. When water seeps into cracks in rocks or soil and then freezes, the expansion of the ice can widen the cracks and break apart the rocks, leading to weathering. Erosion, on the other hand, is typically caused by the movement and transport of weathered material by gravity, water, wind, or ice.