February 2025

Comparing the strength of cylindrical and square tube beams

By |2025-02-12T09:09:42+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Testing the strength of a beam Testing the strength of a beam ZIMSEC O Level Combined Science Notes: Experiment: Comparing the strength of cylindrical and square tube beams

Aim:  To compare the strength of cylindrical and square tubes

Materials: thin cardboard, tin can, sand and glue.

Method

  1. Make a cylindrical tube by rolling a piece […]
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Experiment: To compare the shear and tensile strength of sponge rubber and soft wood

By |2025-02-12T09:26:19+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Sheets of made of sponge rubber. Image credit rollsheetrubber.com Sheets of made of sponge rubber. Image credit rollsheetrubber.com ZIMSEC O Level Combined Science Notes: Experiment: To compare the shear and tensile strength of sponge rubber and soft wood

Aim: To compare the shear and tensile strength of sponge rubber and a softwood

Materials: wooden ice-cream […]

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Machines: Gears

By |2025-02-12T09:45:26+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Machines: Gears

  • A gear is a toothed wheel
  • These toothed wheels transfer motion to one another using their teeth
  • Gears are also known as cogs wheels
  • The teeth on a gear are also known as cogs
  • These cog wheels are usually mounted on shafts
  • The teeth of adjacent cogs fit the grooves of the […]
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Teeth and tooth decay

By |2025-02-12T09:16:38+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Good dental care is part of human health. Image credit claimfame.com Good dental care is part of human health. Image credit claimfame.com ZIMSEC O Level Combined Science Notes: Teeth and tooth decay

  • While people enjoy food of all varieties
  • Some types of food
  • For example sweets, chocolates, carbonated drinks, cakes and […]
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Effects of population growth on natural resources

By |2025-02-12T09:00:15+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Environmental degradation in Epworth. Image credit newsday.co.zw Environmental degradation in Epworth. Image credit newsday.co.zw ZIMSEC O Level Combined Science Notes: Population and natural resources

Environmental Effects

  • Soil erosion
  • Deforestation
  • Desertification
  • Reduced soil fertility

Social Effects

  • Overcrowding
  • Criminal activities
  • Immorality
  • Poor health services
  • Poor education facilities
  • General increase in poverty

To […]

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Power,Authority, Responsibility and span of control

By |2025-02-12T09:34:24+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Mugabe and military officers. image credit insiderzim.com Mugabe and military officers. image credit insiderzim.com

ZIMSEC O Level Business Studies Notes: Organisational Charts

  • These are concepts that are related with how business organisations operate and are organised
  • Power- is the ability or capacity to influence others
  • For example charismatic leaders like Adolf […]
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Laissez-faire leadership style

By |2025-02-12T09:13:21+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Laissez Faire means to let go. Image credit slate.com

ZIMSEC O Level Business Studies Notes: Laissez-faire leadership style

  • Is also known as the free-reign style
  • It comes from a French phrase which means to let go
  • The free reign leader sets goals for subordinates and
  • sets the parameters within which […]
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A list of known Mhondoros/Svikiros in the Mutapa Kingdom

By |2025-02-12T08:55:44+02:00February 12th, 2025|Notes, O Level History Notes, Ordinary Level Notes|

Nyakasikana the last known medium of Nehanda.

ZIMSEC O Level History Notes: The Mutapa Kingdom: A list of known Mhondoros/Svikiros in the Mutapa Kingdom

  • Mhondoros were the national spirit mediums/ancestral spirits in the Mutapa state
  • They were usually made up of royal ancestral spirits
  • The word svikiro comes from a Shona verb (infinitive) kusvika which […]
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