September 2016

Marginal areas in Zimbabwe

By |2022-09-15T12:37:43+02:00September 16th, 2016|Notes, O Level Science Notes, Ordinary Level Notes|

A solar pump in a rural marginal area. Image credit  massmaninter.com

A solar pump in a rural marginal area. Image credit massmaninter.com ZIMSEC O Level Combined Science Notes: Marginal areas in Zimbabwe
  • Large areas of Zimbabwe are marginal areas
  • Marginal areas are mostly located in the lowveld in western and southern […]

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Managing Ecosystems

By |2022-09-15T12:37:44+02:00September 16th, 2016|Notes, O Level Science Notes, Ordinary Level Notes|

The savannah. Image credit wildnatureinstitute.org

The savannah. Image credit wildnatureinstitute.org ZIMSEC O Level Combined Science Notes: Managing Ecosystems
  • The ecosystem needs to looked after to ensure it is in balance
  • Humans can have good or bad effects on the ecosystem
  • Soil is an especially important component of the Zimbabwean ecosystem because […]

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February 2016

Natural Ecosystems

By |2022-09-15T12:40:22+02:00February 28th, 2016|Notes, O Level Science Notes, Ordinary Level Notes|

Impala ecosystem

Natural ecosystem. Image credit wordpress.com ZIMSEC O Level Combined Science Notes: Natural Ecosystems
  • In a natural ecosystem there is close interaction between the plants and animals
  • The green plants are the producers
  • The animals are the consumers
  • There are several levels of consumers
  • Primary consumers-these eat plants directly
  • They are also known as herbivores
  • Secondary […]

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Science: Ecosystems

By |2022-09-15T12:40:30+02:00February 25th, 2016|Notes, O Level Science Notes, Ordinary Level Notes|

An ecosystem diagram. Image credit ck12.org

An ecosystem diagram. Image credit ck12.org ZIMSEC O Level Combined Science Notes: Ecosystems  
  • Is a self-contained system of interdependent organisms and their physical environment
  • An ecosystem can also be defined as a biological community of interacting organisms and their physical environment.
  • In an ecosystem a community of living […]

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