This occurs when water seeps into cracks in rocks and freezes. As the water freezes, it expands and puts pressure on the rock, causing it to crack. Frost wedging is most common in cold climates where the temperature fluctuates around the freezing point.

2. Thermal stress weathering

This occurs when rocks are heated and cooled rapidly. The expansion and contraction of the rock causes it to crack. Thermal stress weathering is most common in deserts where the temperature can vary greatly from day to night.

3. Salt crystal growth

This occurs when water containing dissolved salts seeps into cracks in rocks and evaporates. As the water evaporates, the salts crystallize and put pressure on the rock, causing it to crack. Salt crystal growth is most common in coastal areas where the rocks are exposed to salt water.

4. Hydrolysis

This occurs when water reacts with minerals in rocks to form new minerals. The new minerals can be weaker than the original minerals, causing the rock to break down. Hydrolysis is most common in humid climates where there is a lot of rainfall.

5. Biological weathering

This occurs when plants and animals break down rocks. For example, tree roots can grow into cracks in rocks and pry them apart. Animals can also burrow into rocks and weaken them. Biological weathering is most common in areas with a lot of vegetation.

6. Chemical weathering

This occurs when rocks react with chemicals in the air, water, or soil. For example, oxygen in the air can react with iron in rocks to form iron oxide, which is a weak mineral that can easily break down. Chemical weathering is most common in areas with a lot of chemicals in the environment.