Question

Which one of the following is a fossil fuel?
(A) Petroleum
(B) Wood
(C) Hydrogen
(D) Nuclear Energy

Answer 1

Hint: Fuel is a material which is used to run or make a machine function. It includes coal, oil, wood, gas etc. A fossil is the remains of animals or creatures which once existed in the universe.

Complete answer: Fossils fuels as the name suggests were formed from the dead animals and plants buried within the earth over millions of years ago. The fossil fuels are not sustainable and they are formed in billions of years therefore they are considered as non-renewable resources.
Petroleum is a kind of fossil fuel which is created by the deterioration of an organic substance from millions of years ago. It is used in the manufacturing of various types of materials. About 100 million barrels of Petroleum are used every day in the world.
Wood is an organic fuel which originated from the fibrous cellulose. It is a renewable source of energy and it can be planted more if once finished.
Hydrogen is a very light weighted element and a raw fuel that can be produced. It is a very abundant substance and is found in a large amount in the atmosphere. It is found in a liquid state generally.
Nuclear Energy is the Energy which originates from radioactive elements. It is of two types: Nuclear Fusion and Nuclear Fission.

Hence, Option (A) is the correct answer. Petroleum is a fossil fuel.

Note: Fossil fuels are a non-renewable source of energy and cannot be restored if consumed. Petroleum is the most used fossil fuel and it also pollutes the environment whereas Compressed Natural Gas (CNG) is a non-polluting fossil fuel. Other examples of Fossil Fuels are Coal and Natural Gas.