About Rachel Majaya

She holds a Bachelor of Science Honors in Applied Biology and Biochemistry from National University of Science and Technology, a Certificate in Good Clinical Practices from National Institute on Drug Abuse Clinical Trials Network, a Certificate in Leadership from Deloitte and Certificate in Chemistry Laboratory Experiments from Helsinki Metropolian University of Applied Sciences, Finland.

February 2025

The Effects of TNC in Zimbabwe

By |2025-02-12T09:43:54+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Nestle Zimbabwe and the minister of education. Image credit nestle-ea.com

ZIMSEC O Level Geography Notes: The Effects of TNC in Zimbabwe

  • TNC activities have both positive and negative effects to the economies and people of the host countries in which they operate.

The character and distribution of industry in Zimbabwe

  • The […]
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Small scale energy sources and plants:Biogas plant

By |2025-02-12T09:44:21+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Biogas Digestor in rural Zimbabwe. Image credit climatetracker.org

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Small scale energy sources and plants:Biogas plant

  • To install a bio-gas plant, a pit is dug underground near to the kitchen the depth of which is determined by the size of the plant the family wants […]
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Biology Notes: Water and its properties: Polar solvent

By |2025-02-12T09:44:38+02:00February 12th, 2025|Notes, O Level Biology Notes, Ordinary Level Notes|

ZIMSEC O Level Biology Notes:Properties and Biological significance of water

Property: Polar solvent

  • Water is an excellent solvent for ions and polar molecules because the water molecules attract to them, collect and separate them.
  • This is what happens when a substance dissolves in water.
  • Once a chemical is in solution, it is free to move about and react with other chemicals.

    • […]

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Small scale energy sources and plants:Solar energy

By |2025-02-12T09:44:50+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A Photo-voltaic power plant. Image credit oorjasolar.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Small scale energy sources and plants:Solar energy

  • Solar energy is converted into electrical energy in two ways
  • The first is through the use of solar panels
  • These are also known as photo voltaic power plants for reasons […]
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The role of service industries

By |2025-02-12T09:45:06+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Banks provide essential services.

ZIMSEC O Level Geography Notes: The role of service industries

  • A service industry is an industry which provides back-up to other sectors of the economy such as primary and secondary industries as well as to the people or labour force for them to function well.
  • They are […]
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Biology Notes: Water and its properties: Transparency and high heat of evapouration

By |2025-02-12T09:45:09+02:00February 12th, 2025|Notes, O Level Biology Notes, Ordinary Level Notes|

ZIMSEC O Level Biology Notes: Properties and Biological significance of water

Property: High heat of vaporization

  • This is a measure of the heat energy required to vaporize a liquid to overcome the attractive forces between its molecules so that they can escape as a gas.
  • A relatively large amount of energy is needed to vaporize water.
  • This is due […]
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Small scale energy sources and plants:Bio-fuel

By |2025-02-12T09:45:20+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Jatropha plant. Image credit jatropha.org.za

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Small scale energy sources and plants:Bio-fuel

  • is a fuel that is produced through contemporary biological processes,
  • such as agriculture and anaerobic digestion,
  • rather than a fuel produced by geological processes such as those involved in the formation of fossil […]
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Biology Notes: Water and its properties: Transport medium and specific heat capacity

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

ZIMSEC O Level Biology Notes:Properties and Biological significance of water

Property: Transport medium

  • Water is a neutral liquid medium because it has a pH of 7.

Biological role of this property

  • Water’s solvent properties also mean that it acts as a transport medium in the blood transporting cells, lymphatic and excretory system, the alimentary canal and in the xylem and phloem.

Property: High […]

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Small scale energy sources: Wood stove

By |2025-02-12T09:45:48+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Wood stove. Image credit quadrafire.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Small scale energy sources and plants:Wood stove

  • A wood stove is a heating appliance capable of burning wood fuel and wood-derived biomass fuel, such as wood pellets.
  • Wood stove are usually made using a combination of metal(iron) and bricks

    • […]

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Tourism Industry in Zimbabwe

By |2025-02-12T09:45:57+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Troutbeck in Nyanga. Image credit hotel-r.net

ZIMSEC O Level Geography Notes: Tourism Industry in Zimbabwe

  • Tourism has been the world’s fastest growing industry due to a number of factors.
  • This growth has been taking place in both developed and developing countries although growth rates have been varying between countries.
  • The greatest […]
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