-The origin and state the composition of crude oil (petroleum) -The exploration of and drilling for crude oil in Nigeria -The fractional distillation of petroleum and list the major fractions (products). -The location of Nigerian refineries -The terms cracking and reforming -Discuss the use of petrochemicals as starting materials of organic synthesis leading to organic compounds like plastics, synthetic rubber, drugs, insecticides, detergents, fibres, etc -Explain the use of octane numbers in determining the quality of petrol -Explain the occurrence, packaging and uses of natural gases. State the economic importance of petroleum