Denudational Process - SS3 Geography Past Questions and Answers - page 2

Physical weathering involves the physical breakdown of rocks without changing their chemical composition, while chemical weathering involves chemical reactions that alter the minerals in rocks.

Human activity can accelerate weathering through activities like mining, construction, and pollution. Pollution, especially acid rain, can chemically erode rocks and buildings. Construction activities may expose rocks to weathering processes they would not encounter naturally.

Time is a factor in weathering because weathering is a gradual process that occurs over long periods. The longer rocks are exposed to the elements, the more they will weather. Over time, even the most resistant rocks will eventually break down.

Vegetation can contribute to weathering in two main ways. Tree roots can physically break apart rocks as they grow, a process called root wedging. Additionally, some plants release acids that can chemically weather nearby rocks.

Different types of mass movement include landslides, mudslides, rockfalls, and creep. They can have various impacts, from shaping landscapes and landforms to causing significant environmental and safety concerns, especially in hilly or mountainous regions.