Which energy source is primarily composed of methane and is found underground?

Which energy source is primarily composed of methane and is found underground?

• A. Coal
• B. Nuclear
• C. Natural gas
• D. Uranium

Answer: (C)

Natural gas is primarily composed of methane, a hydrocarbon made up of one carbon atom and four hydrogen atoms (CH4). It is commonly found underground in rock formations or associated with other fossil fuels. Natural gas forms over millions of years from the remains of ancient marine organisms subjected to heat and pressure in geological formations.

This energy source is significant for its versatility and relatively cleaner burning properties compared to other fossil fuels like coal and oil, making it a popular choice for heating, electricity generation, and as a cleaner alternative in transportation. The underground deposits of natural gas are typically accessed through drilling, which extracts the gas to be used for various energy needs.

Coal, while another fossil fuel, is primarily a solid composed mainly of carbon and does not primarily constitute methane. Nuclear energy relies on nuclear reactions, particularly fission, and involves materials like uranium rather than hydrocarbons. Therefore, in the context of energy sources, natural gas is the correct answer because of its direct association with methane and its geological formation processes.