February 2025

Experiment:To compare the effects of atmospheric corrosion on metals

By |2025-02-12T09:26:53+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Rusted metal. Image credit racingstrong.com Rusted metal. Image credit racingstrong.com ZIMSEC O Level Combined Science Notes: Experiment:To compare the effects of atmospheric corrosion on metals

Aim: To compare the effects of atmospheric corrosion on various metals

Materials:  samples of mild steel/cast iron, stainless steel, cutting steel (razor blade/old hacksaw blade), brass, aluminium, copper, plastic […]

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Experiment To show the effect of sulphuric acid on some materials

By |2025-02-12T09:27:31+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The effects of acid rain. Image credit penguinsofchemistry.wordpress.com The effects of acid rain. Image credit penguinsofchemistry.wordpress.com ZIMSEC O Level Combined Science Notes: Experiment To show the effect of sulphuric acid on some materials

Aim: To show the effect of sulphuric acid on some materials

Materials: dilute sulphuric acid, wood, copper, plastic, iron, steel, aluminium, […]

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Experiment: To compare the resistance of different woods to termite attack

By |2025-02-12T09:28:10+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Treated poles. Image credit lynnridgetimbers.co.za Treated poles. Image credit lynnridgetimbers.co.za ZIMSEC O Level Combined Science Notes: Experiment: To compare the resistance of different woods to termite attack

Aim: To compare the resistance of different types of wood to termite attack

Materials: gloss paint, used motor oil, creosote, 4 samples of softwood (pine), 4 samples of […]

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Timber properties and timber structures

By |2025-02-12T09:20:56+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A wooden house. Image credit designrulz.com A wooden house. Image credit designrulz.com ZIMSEC O Level Combined Science Notes:Timber properties and timber structures

  • Wood is a popular material in the construction industry
  • Wood is light and has a high strength/mass ratio
  • Light, strong beams/trusses are a priority in the building of houses

    • […]

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Metal and metal alloy properties and their construction uses

By |2025-02-12T09:21:53+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Metals are popular in construction. Image credit traveldigg.com Metals are popular in construction. Image credit traveldigg.com ZIMSEC O Level Combined Science Notes: Metal and metal alloy properties and their construction uses

  • Metals are popular construction materials
  • They have properties that make them suited for making diverse structures
  • They are ductile which means […]
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Reinforced concrete and stone properties and structures

By |2025-02-12T09:22:52+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Reinforced concrete. Image credit surfcivil.blogspot.com Reinforced concrete. Image credit surfcivil.blogspot.com ZIMSEC O Level Combined Science Notes: Metal and metal alloy properties and their construction uses

  • Often building materials are combined when building a structure
  • The most common such mixture is reinforced concrete
  • It is a mixture of steel and concrete
  • Steel is […]
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Experiment: Comparing the strength of natural timber and other construction materials

By |2025-02-12T09:25:11+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Comparing the strength of various materials Comparing the strength of various materials ZIMSEC O Level Combined Science Notes: Experiment: Comparing the strength of natural timber and other construction materials

Aim: To compare the strength of some natural timbers and other materials

Materials: Plywood, hard wood cut across the grain, soft wood cut along the grain, […]

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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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