January 2023

The carburetor

By |2022-09-15T12:38:53+02:00January 24th, 2023|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 […]
Read More
Comments Off on The carburetor

Types of fuel

By |2022-09-15T12:39:00+02:00January 24th, 2023|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 […]
Read More
Comments Off on Types of fuel

Experiment: Burning fuels

By |2022-09-15T12:39:00+02:00January 24th, 2023|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, […]
Read More
Comments Off on Experiment: Burning fuels

Social and economic factors to consider when using fuels

By |2022-09-15T12:38:52+02:00January 24th, 2023|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:

    • […]

Read More
Comments Off on Social and economic factors to consider when using fuels

Coal as a fuel

By |2022-09-15T12:38:59+02:00January 24th, 2023|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 […]
Read More
Comments Off on Coal as a fuel

Experiment:Making coke and collecting the resulting gases

By |2022-09-15T12:38:58+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Making coke Making coke ZIMSEC O Level Combined Science Notes: Experiment:Making coke and collecting the resulting gases

Aim: To make coke using coal and collect the gas and liquid by-products

Materials: crushed coal, test tubes, glass tubing, splints, lead ethanoate solution, filter paper, red and blue litmus paper, sodium hydroxide solution, beaker, water, trough, […]

Read More
Comments Off on Experiment:Making coke and collecting the resulting gases

Biogas as a source of energy

By |2022-09-15T12:38:58+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Biogas as a source of energy

  • Biogas is the gas that is obtained from fermenting manure and other organic waste
  • It is a mixture of methane, carbon dioxide and hydrogen sulphide
  • Cattle manure is commonly used as a waste to feed biogas plants
  • Small plants have been built in some parts of Zimbabwe

    • […]

Read More
Comments Off on Biogas as a source of energy
Toggle Sliding Bar Area
Go to Top