February 2025

Resistors in parallel and in series

By |2025-02-12T09:28:08+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

fusion_title size=”3″ content_align=”left” style_type=”default” sep_color=”” margin_top=”” margin_bottom=”” class=”” id=””]ZIMSEC O Level Combined Science Notes:  Resistors in parallel and in series [/fusion_title]

  • Resistance in a series can be changed by placing more or less resistors in a circuit
  • The total resistance of resistors depends in the way in which they are arranged in the circuit
  • Resistors can be put in series or […]
Comments Off on Resistors in parallel and in series

Electromagnetic Induction

By |2025-02-12T09:43:51+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Inducing a current using a magnet. Image credit youtube.com Inducing a current using a magnet. Image credit youtube.com ZIMSEC O Level Combined Science Notes: Introduction:Motors and generators

  • Electromagnetic induction- is the production of a voltage across an wires (electrical conductor )due to its dynamic interaction with a magnetic field.
  • If a magnet […]
Comments Off on Electromagnetic Induction

Demonstrating compression and tensile forces

By |2025-02-12T09:08:17+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Demonstrating tension and compression forces Demonstrating tension and compression forces ZIMSEC O Level Combined Science Notes: Experiment: Demonstrating compression and tensile forces

Aim:  To demonstrate compression and tensional(stretching forces)

Materials: glue, tissue paper, rubber, two small blocks of wood, plastic ruler/rubber hose

Method Demonstrating tension and compression forces. Image credit MediaWiki

Comments Off on Demonstrating compression and tensile forces

Factors to consider when choosing construction materials

By |2025-02-12T09:23:47+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A house built using Eco friendly materials. Image credit asiagreenbuildings.com A house built using Eco friendly materials. Image credit asiagreenbuildings.com ZIMSEC O Level Combined Science Notes: Factors to consider when choosing construction materials

  • The choice of building material depends mainly on the properties of the materials and
  • The purpose of the […]
Comments Off on Factors to consider when choosing construction materials

Machines: Pulleys

By |2025-02-12T09:41:07+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Wooden pulleys. Image credit wisegeek.com Wooden pulleys. Image credit wisegeek.com ZIMSEC O Level Combined Science Notes: Machines: Pulleys

  • A pulley is a basic device or machine made of a wheel with a rim that a chain/cord/rope fits around
  • A single fixed pulley as shown below is used to change the direction […]
Comments Off on Machines: Pulleys

Experiment: Food and Energy

By |2025-02-12T09:14:50+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Burning food to to test its energy content Burning food to to test its energy content ZIMSEC O Level Combined Science Notes: Experiment: Food and Energy

Aim: Comparing the energy value of foods

Materials: burners, small containers/beakers to hold the water, food holders, thermometers, different types of starchy and fatty foods

Method

  1. Set up the apparatus […]
Comments Off on Experiment: Food and Energy

Reproduction in Humans

By |2025-02-12T09:31:34+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A Zimbabwean family A Zimbabwean family ZIMSEC O Level Combined Science Notes: Reproduction in Humans

  • Human being produce sexually
  • The process involves the fusion (joining) of the nuclei (sex cells) of the male gamete (sperm)
  • and the female gamete (ovum)
  • To form a zygote
  • The human and female sexual organs take […]
Comments Off on Reproduction in Humans

Frederick Herzberg’s Two factor theory

By |2025-02-12T09:18:39+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Engineer at work. Image credit ibtimes.com Engineer at work. Image credit ibtimes.com ZIMSEC O Level Business Studies Notes: How managers can use Maslow’s theory of motivation

  • Herzberg used questionnaires and interviews to ask professionals about factors that influence employee performance in the workplace
  • His conclusion was that employee performance is affected […]
Comments Off on Frederick Herzberg’s Two factor theory

Introduction to organisational structures

By |2025-02-12T09:31:48+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Workers in a small business startup. Image credit businessinsider.com Workers in a small business startup. Image credit businessinsider.com

ZIMSEC O Level Business Studies Notes: Introduction to organisational structures

  • All businesses, no matter how small or big, are organisations
  • An organisation is a group of people brought together to fulfil a particular […]
Comments Off on Introduction to organisational structures
Go to Top