5.1 MEANINGS/DEFINATIONS:
1. Inexhaustible –Present in unlimited quantity.
2. Fossils – Buried remains of dead plants and animals.
3. Coke – A tough, porous and black substance obtained from coal.
4. Coal tar – A black, thick liquid obtained as the product during the processing of coal.
5. Refining of petroleum – Process of separating the various constituents/ fractions of petroleum.
6. Bitumen – Petroleum product.
7. Petrochemicals – Useful substances that are obtained from petroleum and natural gas.
8. Petroleum – Dark oily liquid .