Which of the following best describes natural gas?

Which of the following best describes natural gas?

• A. A liquid hydrocarbon used for transportation
• B. A solid fuel derived from ancient plants
• C. A gaseous mixture with high methane content
• D. An energy source formed from nuclear fission

Answer: (C)

Natural gas is best described as a gaseous mixture primarily composed of methane, which is a simple hydrocarbon. It is formed from the remains of ancient marine organisms that have undergone significant heat and pressure over millions of years, transforming into a gaseous state beneath the earth's surface. The high percentage of methane (typically 70-90%) in natural gas makes it a clean-burning fossil fuel, releasing less carbon dioxide compared to other fossil fuels when combusted.

This choice highlights the physical state and chemical composition of natural gas, which differentiates it from other energy sources. For instance, while other choices reference fuels in different physical states or formations, they do not accurately reflect the characteristics or formation process of natural gas. The distinction of natural gas as a gaseous mixture is crucial for understanding its applications, environmental impact, and role in the wider spectrum of energy resources.