Oil is one of the world's major sources of energy. We depend on it as fuel for heating, transport
and generation of power. For centuries, animal and vegetable oils have been used for cooking
and as a source of artificial light. But it is mineral oil which meets most of the world's needs
today. Crude mineral oil comes out of the earth as a thick brown or black liquid with a strong
smell. It is a complex mixture of many different substances, each with its own individual
qualities. Most of them are combinations of hydrogen and carbon in varying proportions. Such
hydro-carbons are also found in other forms such as bitumen, asphalt and natural gas. Mineral
oil originates from the carcasses of tiny animals and from plants that live in the sea. Over
millions of years these dead creatures form large deposits under the sea bed and ocean
currents cover them with a blanket of sand and silt. As this material hardens, it becomes
sedimentary rock and effectively shuts out the oxygen so preventing the complete
decomposition of the marine deposits underneath. The layers of sedimentary rock become
thicker and heavier. Their pressure produces heat, which transforms the tiny carcasses into
crude oil in a process that is still going on today. The earth's crust is split into a few huge
continental plates which move continuously rather like rafts on a sluggish tide. Geologists call
this movement as ‘continental drift’.
Answers
Answered by
0
Answer:
depends to the oil price,the economy goes
Similar questions