Question

Which of the following is a fossil fuel
A) Petroleum
B) Wood
C) Cow dung
D) Dry leaves

Answer 1

Fossil fuels are formed by the deposition of the living organism. The organic matter takes centuries to form fossil fuels. It consists of carbon and hydrogen bonds. Fossil fuels are used for energy provision, there are mainly three types of fossil fuels- oil coal, and natural gas.

Complete step by step answer: A) Petroleum- Petroleum was also known as crude oil is a fossil fuel. It was formed from the dead remains of ancient marine organisms like plants, algae, and bacteria. Over millions of years of intense heat and pressure, the dead remains of animals transform themselves into carbon-rich substances.
B) Wood- Unlike petroleum wood is a low-carbon fuel. When trees are cut down and burnt carbon released is taken up and a new tree is grown in their place thus reducing the impact on the environment.
C) Cow dung - Biogas which is produced from the animal manure like cow dung is burnt to create electricity.
D) Dry leaves- When dry leaves are burnt will lose those nutrients from the soil that would have helped the salt in its nourishment and finally end up destroying the soil. We also lose our clean air and creates air pollution.
Thus, option A is the correct answer.

Note: Petroleum is found under the earth’s surface in a huge quantity. Petroleum like natural gas, coal are non-renewable sources of energy. It has taken about millions of years to form. When extracted and consumed there is no way to replace it. Some of the petroleum products are gasoline, fuel oils, asphalt, etc.