climate Archives - Free ZIMSEC & Cambridge Revision Notes

Frost/Snow and Hail

By garikaib|2017-01-17T11:22:34+02:00May 30th, 2015|Notes, O Level Geography, Ordinary Level Notes, Weather and Climate|

A house and vehicle covered in snow. Image by Novinite.

A house and vehicle covered in snow. Image by Novinite. ZIMSEC O Level Geography Notes: Frost/Snow and Hail.

Snow/Frost

Caused by a sudden fall or drop in temperature.
With snow ice crystals are formed in the atmosphere.
When these small ice crystals collide with […]
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Floods

By garikaib|2017-01-17T11:22:35+02:00May 30th, 2015|Notes, O Level Geography, Ordinary Level Notes, Weather and Climate|

Floods in OZ. Image by Time.

Floods in OZ. Image by Time. ZIMSEC O Level Geography Notes: Weather Hazards: Floods.

Some parts of Zimbabwe especially low lying areas like Muzarabani. The Tokwe-Mukosi area near Masvingo experienced severe floods in the 2014/15 rain season leaving a lot of homes destroyed and people […]
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Lightining

By garikaib|2017-01-17T11:22:36+02:00May 30th, 2015|Notes, Weather and Climate|

Lightining. Image by GreenSociety.

Lightining. Image by GreenSociety. ZIMSEC O Level Geography Notes: Weather Hazards: Lightining

Is typically caused by the physical characteristics of cumulonimbus weather conditions.
As rain drops fall the energy which they have causes a positive charge to develop at the top of a cloud and negative charges to develop […]
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Weather Hazards

By garikaib|2017-01-17T11:22:36+02:00May 30th, 2015|Notes, O Level Geography, Ordinary Level Notes, Weather and Climate|

Floods are just one of many natural weather hazards. Image by The Australian.

Floods are just one of many natural weather hazards. Image by The Australian. ZIMSEC O Level Geography Notes: Weather Hazards

Weather hazards are conditions which are unfavorable to people and their activities that result from weather phenomena.
There are […]
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Weather symbols/ Synoptic Charts

By garikaib|2017-01-17T11:22:43+02:00May 25th, 2015|O Level Geography, Weather and Climate|

weather-min

ZIMSEC O Level Geography Notes: Weather Symbols and Synoptic Charts

After weather measurements have been taken at weather stations
they are then plotted onto synoptic charts.
These charts make use of special symbols as a form of pre-agreed shorthand that is used to show the weather conditions at a given place at a […]
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Prevailing Winds in Southern Africa

By garikaib|2017-01-17T11:22:44+02:00May 25th, 2015|O Level Geography, Weather and Climate|

The Harmattan

The Harmattan. Image by Kafkaesqublog ZIMSEC O Level Geography Notes: Prevailing Winds in Southern Africa

The eastern parts of Zimbabwe about 200km from the port of Beira and on average Zimbabwe is about 400km from the Indian Ocean, the closest ocean to the country.
Due to its proximity to the […]
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Convectional rainfall

By garikaib|2017-01-17T11:22:46+02:00May 22nd, 2015|O Level Geography, Weather and Climate|

Convectional Rainfall commonly occurs in rainforests. Image by Wallpaperlepi

Convectional Rainfall commonly occurs in rainforests. Image by Wallpaperlepi ZIMSEC O Level Geography Notes: Convectional Rainfall

This is the main type of rainfall in the humid tropics such as the Amazon and Congo rain forests.
Occurs when the ground surface is locally […]
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Orographic/Relief Rainfall

By garikaib|2017-01-17T11:22:47+02:00May 22nd, 2015|O Level Geography, Weather and Climate|

Aberfoyle Tea Estate in the Eastern Highlands is one of the places that receive a lot of Relief rainfall. Image Credit Buckinghambirding.

Aberfoyle Tea Estate in the Honde Valley Eastern Highlands is one of the places that receive a lot of Relief rainfall. Image Credit Buckinghambirding. ZIMSEC O Level Geography Notes: […]

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Pressure systems

By garikaib|2017-01-17T11:22:52+02:00May 19th, 2015|O Level Geography, Weather and Climate|

The world's pressure belts

The world’s pressure belts and winds ZIMSEC O Level Geography Notes: Pressure

Pressure

Air has weight and therefore exerts pressure, called atmospheric pressure onto the earth’s surface.
The pressure is not the same for all regions nor is it the same for any one region all the time that […]
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Sunshine

By garikaib|2017-01-17T11:22:53+02:00May 19th, 2015|O Level Geography, Weather and Climate|

A sunshine recorder. Image by Rfuess-Mueller.

A sunshine recorder. Image by Rfuess-Mueller. ZIMSEC O Level Geography Notes: Sunshine

It has a glass sphere surrounded by a metal frame.
On the frame is attached a sensitive card.
The sphere focuses the sun’s rays onto the card.
As the sun moves across the sky it burns […]
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May 2015

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ZIMSEC Announces new USD registration fees.

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