weather Archives - Page 2 of 2 - Free ZIMSEC & Cambridge Revision Notes

Sunshine

By garikaib|2022-09-15T12:44:55+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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Wind direction and speed

By garikaib|2022-09-15T12:44:56+02:00May 19th, 2015|O Level Geography, Weather and Climate|

A cup anemometer and windvane. Image by Noaa.gov.

A cup anemometer and windvane. Image by Noaa.gov. ZIMSEC O Level Geography Notes: Wind direction and speed.

Wind is the movement of air across the earth’s surface due to differences in pressure between two regions. Air moves from high pressure regions to low […]

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Humidity

By garikaib|2022-09-15T12:44:57+02:00May 17th, 2015|O Level Geography, Weather and Climate|

Wet and dry bulb thermometer. Image by TradeIndia

Wet and dry bulb thermometer. Image by TradeIndia ZIMSEC O Level Geography Notes: Humidity

-a quantity representing the amount of water vapor in the atmosphere.

It is measured using a hydrometer.
The wet and dry bulb thermometer is also known as a psychrometer.
Weather satellites can […]
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Stevenson’s screen

By garikaib|2022-09-15T12:44:58+02:00May 17th, 2015|O Level Geography, Weather and Climate|

An open Stevenson screen showing the instruments it houses. Image by Hubhomedesign.

An open Stevenson screen showing the instruments it houses. Image by Hubhomedesign. ZIMSEC O Level Geography Notes: Stevenson Screen

A Stevenson screen is a prominent feature on most weather stations.

It is used to house weather instruments, for example the […]
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Temperature

By garikaib|2022-09-15T12:44:58+02:00May 17th, 2015|O Level Geography, Weather and Climate|

Six's thermometer

Six’s thermometer ZIMSEC O Level Geography Notes: Temperature

The daily maximum and minimum temperatures are measured using Six’s thermometer (pictured above).
It was invented by James Six a British scientist hence the name Six’s thermometer.
It is also known as the Maximum and Minimum thermometer.
It is housed in a Stevenson’s screen.
Diurnal […]
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Introduction to weather and climate

By garikaib|2022-09-15T12:44:59+02:00May 17th, 2015|O Level Geography, Weather and Climate|

Rainy Weather. Image by Sodahead.

Rainy Weather. Image by Sodahead. ZIMSEC O Level Geography Notes: Introduction to Weather and Climate

Weather-the state of the atmosphere at a particular place and time as regards heat, cloudiness, dryness, sunshine, wind, rain, etc. The weather is all around us, all the time. It is an […]

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May 2015

Sunshine

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Wind direction and speed

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Humidity

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Stevenson’s screen

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Temperature

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Introduction to weather and climate

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