Lesson Notes By Weeks and Term v4 - JHS 3

Lesson Video

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Performance objectives

• Identify indigenous industries in your community.
• Explain the scientific processes in their production.
• Recognize the science behind everyday indigenous practices.
• Suggest improvements to local industries using science.

Lesson summary

In many Ghanaian communities, people run indigenous industries such as palm oil processing, gari making, pito brewing, soap (alata samina) production, pottery, kente weaving, blacksmithing, fish smoking, shea butter extraction, and charcoal production. These industries are not “just tradition”; they involve science—heat transfer, fermentation, separation methods, chemical changes, forces, materials, and simple machines. Understanding the science behind them helps learners: improve product quality and safety, reduce waste and pollution, increase efficiency and income, appreciate Ghanaian innovation and culture.

Lesson notes

A. Meaning of Key Terms Indigenous industry: A local, community-based way of producing goods using knowledge and skills passed down over time, often using locally available materials and simple tools. Examples: gari processing, palm oil extraction, pottery, local soap making.

Scientific process: A method or action used to achieve a result in production, e.g., heating, cooling, fermentation, drying, filtering, pressing, grinding, mixing, evaporation.

Scientific concept/principle: The science idea that explains why a process works, e.g., heat transfer, solubility, density, chemical reaction, microorganisms in fermentation, pressure, force, changes of state.

B. Common Scientific Ideas in Indigenous Industries 1) Heating and Heat Transfer Conduction: heat moves through direct contact (e.g., metal pan on fire). Convection: heat moves through fluids (e.g., hot air in a smoking kiln; boiling liquid). Radiation: heat travels as waves (e.g., heat felt from fire).

Evaluation guide

• Discuss indigenous industries in their communities and identify the
• scientific processes, concepts and principles underlying the stages of
• production in the industries.
• Identify indigenous practices at home, school and the community and