February 2025

Experiment:investigating fuel efficiency

By |2025-02-12T09:11:59+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Testing fuel to determine its energy content Testing fuel to determine its energy content ZIMSEC O Level Combined Science Notes: Experiment:investigating fuel efficiency

Aim: To determine the amount of heat liberated when different liquid fuels burn

Materials:  2 spirit burners, wooden block, clamp and stand, meths, paraffin, thermometer, draught shields, clamp, beaker, water, tripod […]

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Fuel Engines

By |2025-02-12T09:12:54+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Most cars use fuel engine. Image credit ecurrent.fit.edu/blog/ Most cars use fuel engine. Image credit ecurrent.fit.edu/blog/ ZIMSEC O Level Combined Science Notes: Fuel Engines

  • A machine is a device that changes energy from one form to another
  • When the energy used by the machine is chemical energy the machine is called […]
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The carburetor

By |2025-02-12T09:14:26+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A carburettor is an important part of the Petrol engine. Image credit MediaWiki A carburettor is an important part of the Petrol engine. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: The carburetor

  • A carburettor is an essential part of Petrol engines
  • A typical carburettor has the following parts:
  • An […]
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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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Experiment: Burning fuels

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

Burning Fuels Burning Fuels ZIMSEC O Level Combined Science Notes: Experiment: Burning fuels

Aim: To burn and investigate the nature of fuels

Materials: methylated spirits/alcohol, candle, meths burner, bunsen burner, paraffin, tin lid or porcelain dish, tongs

Method

  1. Light a meths burner and observe the flame
  2. Burn a small amount of alcohol on a tine lid, […]
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Social and economic factors to consider when using fuels

By |2025-02-12T09:16:45+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Oil spills are destructive to vegitation. Image credit africanewscircle.com Oil spills are destructive to vegetation. Image credit africanewscircle.com ZIMSEC O Level Combined Science Notes: Social and economic factors to consider when using fuels

  • The extraction and consumption of fuels has led to a lot of problems in recent years
  • Problems include:

    • […]

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Coal as a fuel

By |2025-02-12T09:03:21+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Coal Mining at Hwange. Image credit chronicle.co.zw Coal Mining at Hwange. Image credit chronicle.co.zw ZIMSEC O Level Combined Science Notes: Coal fuel

  • Coal is a common solid fuel
  • It is a non-renewable resource
  • It is used as a raw material by industries such as at ZISCO and less commonly as a […]
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