February 2025

Extraction of iron: The blast furnace

By |2025-02-12T09:21:45+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Extraction of iron: The blast furnace

  • After iron ore is mined it is send to the blast furnace
  • Iron is extracted from its ore in a blast furnace

 

The structure of a blast furnace. Image credit s-cool.co.uk The structure of a blast furnace. Image credit s-cool.co.uk

    […]
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Properties of Nonmetals vs metals

By |2025-02-12T09:21:43+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Common metal objects. Image credit blogspot.com Common metal objects. Image credit blogspot.com ZIMSEC O Level Combined Science Notes: Experiment: Properties of Metals and Non-Metals

  • Elements can be divided into two groups:
  • Metals and Non-metals
  • Examples of metals are: copper, zinc, iron, gold, silver, chrome, lead and tin
  • Almost all metals have certain properties that makes them […]
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Experiment: Testing the physical properties of metals and non-metals

By |2025-02-12T09:23:02+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Common non-metals. Image credit blogspot.com Common non-metals. Image credit blogspot.com ZIMSEC O Level Combined Science Notes: Experiment: Testing the physical properties of metals and non-metals

Aim:To examine the physical properties of metals and non-metals

Materials: aluminium foil, carbon rod taken from a torch cell, copper foil, gas jars of oxygen, hydrogen; sulpher, […]

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Common metals and their uses

By |2025-02-12T09:24:03+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Copper wires. Image credit globalminingobserver.com Copper wires. Image credit globalminingobserver.com ZIMSEC O Level Combined Science Notes: Common metals and their uses

  • Common metals include:
  • aluminium
  • iron and
  • copper

Copper

  • is a soft, malleable and ductile metal with very high heat and electrical conductivity
  • has a reddish-orange color
  • It is used in thermostat, in electrical wiring
  • It is also […]
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Heating metals in air

By |2025-02-12T09:32:08+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

 ZIMSEC O Level Combined Science Notes: Heating metals in air
  • Some metals react with oxygen in the air at ordinary (room) temperature
  • Others only react with oxygen if they are heated in air
  • They may do this readily and release large amounts of energy in the process
  • Some metals hardily react at all even at very high temperatures

    • […]

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Experiment: The reaction of metals with dilute Hydrochloric acid

By |2025-02-12T09:41:04+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Copper does not react with hydrochloric acid. Image credit fphoto.com Copper does not react with hydrochloric acid. Image credit fphoto.com ZIMSEC O Level Combined Science Notes:  Experiment: The reaction of metals with dilute Hydrochloric acid

Aim: To examine the reactivity of metals with dilute hydrochloric acid

Materials: 5 test tubes, dilute hydrochloric acid, magnesium, zinc, […]

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