Geography & History Notes | KCSE, NECTA, ZIMSEC & GCSE

Industry is defined as the skill of making other products from raw materials.  It involves extraction and processing into finished products of raw materials  Early Sources of Energy.  Energy is the ability to do work. The following are the early sources of energy that can be identified. Wood.  Wood developed as a source of energy after the discovery of fire. It was used as follows;  Making fire which provides heat to warm people during cold seasons lighting, to cook roots and roast meat, for hunting(bushfires), tool-making to harden tips, means of communication, food preservation  Charcoal made from wood fuel provided heat that was used for steaming water to provide steam power for steam engines during the industrial revolution. This is a form of energy still in use today since it is cheaper and easily available.  Wind Wind was used to drive sailing ships during the trade between East African Coast and the Far East. Windmills were used in China to gri...

  For domestic use e.g. wood and charcoal for cooking and heating, etc. For use in industries e.g. electricity, petroleum, etc. Used in transportation e.g. electric cars, diesel and petrol used in motor vehicles, etc. Used in agriculture e.g. diesel for tractors which draw ploughs, electricity for milking machines, etc. Used in the water supply where diesel engines windmills and solar power is used to pump water. Used for medical purposes where electricity is used to run equipment for diagnosis e.g. X-Ray and scanning machines and refrigeration to preserve specimens on medical research. Measures to manage and conserve energy Management of energy is effective planning and control of energy resources. The following are measures that can be used to Manage energy: Control of importation of vehicles with large engine capacity which consumes a lot of fuel. Encouraging many people to use public transport in order to reduce the number of vehicles on roads and thus fuel consumption. Educa...