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Discuss the relative importance of human and physical causes of desertification. [15 marks]

Desertification is the expansion of dry desert conditions into areas that previously had not experienced them. This is characterized by lower soil productivity and a depletion of natural resources. There are...
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Answered by Oliver S. • Geography tutor
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What is a physical reason why river basins are naturally vulnerable to flooding?

One reason is due to a lack of vegetation in a river basin. Vegetation acts as a barrier to surface runoff, therefore it reduces overland flow. If vegetation is limited, water will quickly enter river channe...
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Answered by Daniel H. • Geography tutor
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With an example, describe what is meant by a destructive plate boundary and what feature (s) may form as a result.

A destructive plate boundary exists when a continental and oceanic plate boundary meet. The oceanic plate descends underneath the oceanic plate as it is denser. The build-up of friction between the two plate...
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Answered by Michael H. • Geography tutor
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What is the difference between weather and climate?

Both terms describe changes in atmospheric conditions, but on different timescales. Weather describes short-term variation (i.e. daily and hourly) whereas climate refers to long-term trends of change happeni...
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Answered by Emil B. • Geography tutor
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Assess the importance of a chosen marine ecosystem (15)

Coral reefs: diverse/fragile ecosystem, found in coastal areas/tropics/warm waters 23-29degrees C, (temp needed to sustain growth) valuable goods and services, threatened by global warming, rising SST. 1) Bi...
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Answered by Maria B. • Geography tutor
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