Depressions
The characteristics and weather pattern associated with a depression. Image by the BBC. ZIMSEC O Level Geography Notes.
Characteristics
- This is an area of low pressure whose shape on a map is oval or circular.
- It is represented […]
February 2025
Advantages of Rift Valleys and Block Mountains
Yosemite Mountains and Valley. Image by Mountainprofessor. ZIMSEC O Level Geography Notes: Advantages of Rift Valleys and Block Mountains
Advantages of block mountains
- Relief rainfall is common raising the amount of annual precipitation within the vicinity of such mountains.
- They have a cooler environments which invigorating tends to […]
Deflation Hollows
Deflation Hollow. Image via Imgkid ZIMSEC O Level Geography Notes: Deflation Hollows
- Are also known as closed hollows or blowouts.
- These are enclosed depressions caused by wind erosion.
- In deserts the wind erodes loose material from flat areas which have, uncemented sediments such as those occurring in […]
Waterfalls and Rapids
The Victoria Falls formed by water falling into a faultline. Image credit trekearth.com ZIMSEC O Level Geography Notes: Waterfalls and Rapids
Waterfalls and Rapids
- Waterfalls commonly occur in the upper course section of the river although they can occur […]
Anticyclones
Pictures showing wind direction in an anti-cylcone (right) in both the southern and nothern hemisphere. Image by Physical Geography ZIMSEC O Level Geography Notes: Anticyclones.
Features of anticyclones.
- These are areas of high […]
Vulcanicity
Violent volcanic eruption. Image via Dailymail. ZIMSEC O Level Geography Notes: Vulcanicity
- Vulcanicity refers to all the various way by which molten rock and gasses are forced into the earths and onto its surface.
- It includes volcanic eruptions which lead to the formation of volcanoes, lava plateaus and geysers.
- It […]
Sand Dunes and Ripples
Seif dunes. Image credit 7-themes.com ZIMSEC O Level Geography Notes: Sand Dunes
- As soon as wind velocity drops wind deposition occurs.
- The heaviest material is deposited first while the finer material and dust is carried further before being dropped.
- As a result loess (which consists of fine particles) is sometimes […]
A satellite photo of the Nile Delta. Image creditCyclones
The formation of a cyclone. Image via Imagarcade. ZIMSEC O Level Geography Notes: Cyclones
Features of a cyclone.
- These are systems of intense low pressure.
- There are sometimes known as hurricanes (the U.S and the American continents) and typhoons( in Asian countries).
- On a map the […]
Landforms resulting from intrusive vulcanicity
Some of the landforms resulting from intrusive vulcanicity. Image by Msnucleus.org ZIMSEC O Level Geography Notes: Landforms resulting form intrusive vulcanicity
Intrusive vulcanicity is the movement of gasses, magma and other materials into the earth’s curst to form interior volcanic […]