Denudational Process - SS3 Geography Past Questions and Answers - page 2
Which type of weathering involves the freeze-thaw cycle?
Biological weathering
Physical weathering
Chemical weathering
Mass movement
What plays a significant role in the prevalence of mass movement like landslides?
Climate
Vegetation
Topography
Time
Which type of mass movement involves rapid, downslope movements of rock, soil, and debris?
Creep
Mudslide
Rockfall
d) Landslide
In which type of climate is freeze-thaw physical weathering more likely to occur?
Hot and humid
Cold and dry
Hot and dry
Cold and humid
How do lichens contribute to weathering?
By physically breaking rocks
By releasing acids that chemically weather rocks
By absorbing rocks' moisture
By preventing any weathering
Describe the main differences between physical weathering and chemical weathering.
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.
How can human activity accelerate weathering processes, and what are some examples of this?
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.
Explain how time is a factor in weathering processes and the effects it has on rocks and minerals.
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.
Discuss the role of vegetation in weathering processes and provide examples of how plants contribute to weathering.
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.
What are the different types of mass movement, and how do they impact landscapes and the environment?
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.