hot deserts Archives - Free ZIMSEC & Cambridge Revision Notes

Human activities in deserts

By garikaib|2025-02-12T09:09:35+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Oil drilling in a desert. Image credit Foxoildrilling.com ZIMSEC O Level Geography Notes: Human Activities in Deserts

In spite of their hostile enviroments brought about by aridity leading to shortage of water, pasture, wood fuel and other wood resources, remoteness, infertile and salty […]

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Methods of preventing desertification

By garikaib|2025-02-12T09:13:03+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Badia Dam in the midst of a desert. Image credit Broadleap.org. ZIMSEC O Level Geography Notes: Methods of preventing desertification.

The following methods can be used to prevent and slow down the rate of desertification:

Afforestation that is planting trees where […]

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Characteristics of Hot Deserts

By garikaib|2025-02-12T09:28:03+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Kalahari Desert. Image credit HDImageLib ZIMSEC O Level Geography Notes:Characteristics and Location of Hot deser

NB:It is important to note that the Ordinary Level syllabus confines our study to hot deserts that are otherwise known as tropical deserts. Other deserts such as the cold deserts of […]

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Location and Causes of Hot Deserts

By garikaib|2025-02-12T09:31:05+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

A map showing the location of the world’s major deserts. Image credit English-Online.net ZIMSEC O Level Geography Notes: Location of Hot Deserts.

The largest arid and semi-arid deserts occur between latitudes 15° and 30° North and South of […]

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Yardangs, Zeugens and Rock Pedestals

By garikaib|2025-02-12T08:56:37+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Zeugens. Image credit Revisionworld.com ZIMSEC O Level Geography Notes: Hot Deserts: Yardangs

Zeugens

Pictured in the diagram above.
Zeugens are the ridges in “ridge and furrow” landscapes found in deserts.
These ridge and furrow landscapes sculpted found in hot deserts are a result of wind erosion.
Wind abrasion turns a desert surface […]

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Inselbergs

By garikaib|2025-02-12T09:00:10+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

An inselberg in the Namib Desert. Image credit MediaWiki. ZIMSEC O Level Geography Notes: Hot Deserts: Inselbergs

These are round topped mounds of rock found in deserts as a result of persistant wind erosion over long periods of time.
In some deserts such […]

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Water Action in Deserts

By garikaib|2025-02-12T09:02:10+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Rain falling in a desert. Image credit Snipview.

In most deserts rain does not fall for several years.
When it does it comes in the form of unexpected and infrequent downpours.
Therefore despite the low rainfall totals (about 250mm per annum), water is […]

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Water in Hot Deserts

By garikaib|2025-02-12T09:03:51+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Flash floods in a desert. Image credit Backroadswest.com ZIMSEC O Level Geography Notes: Water in Hot Deserts

Water action in deserts can be divided into three:
freak storms or rain that falls sometimes in semi-arid regions,
dew which plays formed as a result of temperatures […]

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Mesa and Butte

By garikaib|2025-02-12T09:06:32+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Messa (left) and Butte (right). Image credit channingchurch.com ZIMSEC O Level Geography Notes: Mesa and Butte

Mesas and buttes are flat topped uplands with steep sides and often capped by hard resistant rocks.
Mesas and buttes are desert features created primarily by river erosion […]

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Playas

By garikaib|2025-02-12T09:07:39+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

A playa. Image credit bergoiata.com ZIMSEC O Level Geography Notes: Playas

These are sometimes known as inland drainage basins.
Due to the fact that there are no permanent drainage patterns in deserts any rain that falls either evaporates or infiltrates into the soil or runs off and […]

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February 2025