Answer :
When joints within rocks are aligned, a type of weathering known as mechanical weathering takes place whereby layers of rock break off and new layers are revealed.
Due to the fact that nature is constantly active, even if this activity occurs more slowly than human senses can perceive, mechanical weathering is a physical process that occurs continuously in the environment. As an illustration, we can feel temperature changes from day to night, yet we cannot see a rock swell and shrink as a result of these temperature changes. The rock does, however, experience this imperceptible movement, which weakens it and finally leads to its fracture and breakdown. This is just one instance of mechanical weathering. Let's examine each of the several mechanical weathering processes in more detail.
We've been talking about how changing temperatures effect rocks. Minerals have a propensity to expand and contract in response to temperature, a phenomenon known as thermal expansion.
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