Petroleum occurs deep inside the earth floating over water. Which 2 properties of petroleum makes it possible to form a separate layer over water?
Why does petroleum oil float over water? [2 MARKS]
(i) Name the process of conversion of wood into coal.
(ii) Name the country which is the leading producer of petroleum.
(iii) Name the gas that occurs over petroleum in reservoirs deep inside the earth.
(iv)Where and when was the first oil well drilled?
(v) What is the full form of PCRA?
Identify the factors that cause the transformation of dead organisms into petroleum and natural gas deep inside the earth?