February 2025

Sole Trader: Trading and Profit and Loss Account and Capital Accounts

By |2025-02-12T09:18:14+02:00February 12th, 2025|Notes, Ordinary Level Notes, Principles of Accounts Notes|

Image credit clarkewillmott.com Image credit clarkewillmott.com ZIMSEC O Level Principles of Accounts Notes: Terms used in the Trading and Profit and Loss account

  • The Trading and Profit and Loss Account is not balanced off at the end of the trading period
  • This means there are in no corresponding “balance b/d” in the […]
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Experiment: Heating metals in air

By |2025-02-12T09:32:58+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Burning metals in air, Magnesium oxide. Heating metals in air, Magnesium oxide. ZIMSEC O Level Combined Science Notes: Experiment: Heating metals in air

Aim: To heat metals in air and observe and record the process and results

Materials: magnesium, zinc, iron, copper, tongs, burner

Method

  1. Exam the metals and take note of their appearance before heating […]
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Experiment: investigating reversible reactions

By |2025-02-12T09:19:15+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes:  Experiment: investigating reversible reactions

Aim: Investigating reversible reactions

Materials: boiling tube, test tubes, copper sulphate crystals,solid ammonium chloride, red litmus paper, blue litmus paper, dilute hydrochloric acid, sodium hydroxide solution, potassium chromate solution, tongs

Heating ammonium chloride. Image credit youtube.com Heating ammonium chloride. Image credit youtube.com

Method A

  1. Place a few […]
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Experiment: Copper plating an iron nail

By |2025-02-12T09:33:55+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Copper plating iron Copper plating iron ZIMSEC O Level Combined Science Notes:  Experiment: Copper plating an iron nail

Aim: Copper plating an iron nail

Materials: beaker, copper sulphate, dilute sulphuric acid, iron nail, copper electrode, amateur, 1.5V torch cells, sandpaper

Method

  1. In a beaker,make up 100 cm3 of solution containing 40g of copper sulphate
  2. Carefully add […]
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Types of fuel

By |2025-02-12T09:01:00+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Engen Garage. Image credit chronicle.co.zw Engen Garage. Image credit chronicle.co.zw ZIMSEC O Level Combined Science Notes: Types of fuel

  • A fuel is any type of material that can be made to react (commonly with oxygen) and release energy in the process
  • Fuel provides energy to a body/machine to do work
  • Fuels […]
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