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.
ZIMSEC O Level Geography Notes: Weather Symbols and Synoptic Charts
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.
People and Weather. Image via CNN. ZIMSEC O Level Geography Notes: People and Weather
Greenhouses are used to grow crops like tomatoes in areas that suffer from frost or during winter. Image via Sustainablenantucket. ZIMSEC O Level Geography Notes: People and Weather: Deliberate Changes
Greenhouses
Clouds. Image by ThirdScribe. ZIMSEC O Level Geography Notes: Clouds
Refers to the fraction of the sky obscured by clouds when observed from a particular location. Okta is the usual unit of measurement of the cloud cover. Sky conditions are estimated in terms of how many eighths of the […]
ZIMSEC O Level Geography Notes: People and Weather: Accidental Changes
Acid Rain
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 […]
Urban Heat Island. The diagram shows typical temperature differences between an Urban area and the adjacent rural area. Image via Pixshark.
ZIMSEC O Level Geography Notes: Urban Heat Islands.
An aneroid barometer. Image 
