Question

Explain the process of formation of petroleum. Name any three constituents of petroleum.[3 marks]

Answer 1

Petroleum was formed from organisms living in the sea. As the organisms died, their bodies settled at the bottom of the sea and got covered with layers of sand and clay. Over millions of years, the absence of air, high temperature and high pressure transformed the dead organisms into petroleum. [2 marks]

Three constituents of petroleum are petroleum gas, petrol, and diesel. [1 mark]