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Using Figure 4 and your own knowledge, assess the view that low precipitation is the most important factor leading to the development of this landscape - AQA - A-Level Geography - Question 2 - 2020 - Paper 1
Question 2
Using Figure 4 and your own knowledge, assess the view that low precipitation is the most important factor leading to the development of this landscape. Figure 4 sh... show full transcript
Worked Solution & Example Answer:Using Figure 4 and your own knowledge, assess the view that low precipitation is the most important factor leading to the development of this landscape - AQA - A-Level Geography - Question 2 - 2020 - Paper 1
Step 1
Assess the importance of low precipitation
Answer
Low precipitation is indeed a crucial factor in the formation of desert pavements, as it directly affects soil moisture and vegetation. In arid regions like central Iran, a lack of moisture leads to limited plant growth, which in turn reduces organic matter in the soil and increases surface erosion. Low moisture levels cause soil compaction, which leads to the formation of desert pavements, characterized by a surface layer of closely packed stones.
In regions with adequate rainfall, vegetation would help stabilize the soil, preventing erosion and allowing a more diverse range of landforms to develop.
Step 2
Consider other contributing factors
Answer
While low precipitation is significant, other factors also play critical roles in landscape development. For instance, weathering processes such as thermal expansion and contraction significantly contribute to the breakdown of rocks, facilitating the formation of desert pavements. Additionally, wind erosion can remove finer particles, leaving behind larger, more resistant stones, a process observable in the landscape depicted in Figure 4.
Furthermore, human activities and geological processes can interact with climatic conditions, further shaping the landscape.
Step 3
Evaluate the overall impact
Answer
In conclusion, while low precipitation is a fundamental driver behind the development of the landscape shown in Figure 4, it cannot be viewed in isolation. A comprehensive understanding requires an appreciation of the interplay between various environmental factors, such as weathering, erosion, and human influence. Together, these processes form the unique desert landscape, making low precipitation a vital but not the sole contributor.