Convectional rainfall
Convectional Rainfall commonly occurs in rainforests. Image by Wallpaperlepi ZIMSEC O Level Geography Notes: Convectional Rainfall
February 2025
Prevailing Winds in Southern Africa
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 […]
Weather symbols/ Synoptic Charts
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 […]
Weather Hazards
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 […]
Lightining
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 […]
Floods
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 […]
Frost/Snow and Hail
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 […]
Pressure systems
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 […]
Introduction to weather and climate
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 […]
Temperature
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 […]