Science, Energy and power technology

The conventional sources of energy are generally non renewable sources og energy, which are being used since a long time. the coal, petroleum, natural gas and electricity arw conventional sources of energy. so while explaining the lesson "conventional sources of energy" class IX, the students should be told how these fossil fuels like coal, petroleum can be used in thermal power plant where in fuel is burnt to produce heat energy ehich is converted into electrical energy. videos should be shown to the students for better understanding.