Hot Deserts (OCR GCSE Geography A (Geographical Themes)): Flashcards
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What proportion of Earth's land is desert?
What proportion of Earth's land is desert?
One-third
Annual rainfall in the Sahara
Annual rainfall in the Sahara
Less than 250 mm per year
Latitude range where hot deserts are found
Latitude range where hot deserts are found
20-30 degrees north and south of Equator
Tropics passing through hot desert regions
Tropics passing through hot desert regions
Tropic of Cancer and Tropic of Capricorn
Number of continents (out of 7) with deserts
Number of continents (out of 7) with deserts
5
Why does equator have rainforests not deserts?
Why does equator have rainforests not deserts?
Warm air rises, cools, creates rain
What happens to air at the equator
What happens to air at the equator
Warms and rises
State of air at 30° from equator
State of air at 30° from equator
Cool, dry, has lost moisture
What cool, dry air does at 30° latitude
What cool, dry air does at 30° latitude
Sinks back down
Texture of desert soil
Texture of desert soil
Shallow with coarse, gravelly texture
Fertility of desert soil
Fertility of desert soil
Not very fertile
Reason desert soil isn't fertile
Reason desert soil isn't fertile
Hardly any leaf fall