Desertification - Causes and Solutions (OCR GCSE Geography A (Geographical Themes)): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is desertification?
What is desertification?
Land becoming drier and less productive
What proportion of the world's land surface is at risk of desertification?
What proportion of the world's land surface is at risk of desertification?
One third
Which area is the most famous region at risk from desertification?
Which area is the most famous region at risk from desertification?
The Sahel in Africa
How does climate change affect rainfall in areas at risk of desertification?
How does climate change affect rainfall in areas at risk of desertification?
Reduces rainfall in already dry areas
What happens when temperatures increase due to climate change?
What happens when temperatures increase due to climate change?
More water evaporates from land & plants
What is the main problem with overgrazing?
What is the main problem with overgrazing?
Cattle eat plants faster than regrowth
Why does over-cultivation cause desertification?
Why does over-cultivation cause desertification?
All soil nutrients get used up
What causes salinization in over-irrigated soil?
What causes salinization in over-irrigated soil?
Evaporation draws salts to surface
How does afforestation help prevent desertification?
How does afforestation help prevent desertification?
Tree roots hold soil together
What are earth dams used for in water management?
What are earth dams used for in water management?
Store water in wet season for dry use
Why is crop rotation an effective solution to desertification?
Why is crop rotation an effective solution to desertification?
Different crops use different nutrients
What is the purpose of bunds (magic stones)?
What is the purpose of bunds (magic stones)?
To hold water on soil surface