400
Ice and water are two agents that can be involved in the process of weathering. Explain how freezing and thawing can cause weathering.
Many rocks contain tiny cracks. When it rains, these cracks fill with water. If the temperature drops, the water in the cracks turns to ice. As ice is formed, it expands. Over time, the repeated processes of freezing and thawing will cause these cracks to grow. Eventually, the rocks will break apart.