June 2015

Chemical weathering

By |2017-01-17T11:22:13+02:00June 9th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Chemical weathering in a desert environment. Image credit Diffen.com

Chemical weathering in a desert environment. Image credit Diffen.com ZIMSEC O Level Geography Notes: Main types of weathering: Chemical weathering
  • Chemical weathering is the breaking down or decomposition of rocks as a result of various chemical processes and reactions altering the chemical […]

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May 2015

Unintentional changes to weather

By |2018-05-10T15:34:27+02:00May 29th, 2015|Notes, O Level Geography, Ordinary Level Notes, Weather and Climate|

ZIMSEC O Level Geography Notes: People and Weather: Accidental Changes

Acid Rain

  • The smoke from burning fuels and chemical industries rises into the air and mixes with water vapour.
  • When the rain falls down it becomes acidic.
  • The acid rain is a weak acid made up of sulphuric and nitric acids.
  • Over, a long time (years for example), the rain […]

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