What are the three main types of fossil fuels?

What are the three main types of fossil fuels?

• A. Coal, oil (petroleum), and natural gas
• B. Coal, peat, and wood
• C. Oil, uranium, and thorium
• D. Natural gas, hydrogen, and ethanol

Answer: (A)

Fossil fuels are non-renewable energy sources formed over millions of years from ancient organic matter buried and transformed by heat and pressure. The three main types are coal, oil, and natural gas. Coal is a solid fuel from ancient plant material, rich in carbon and used for electricity and steel. Oil, or petroleum, is a liquid hydrocarbon formed from microscopic organisms and is the primary source for fuels and many chemicals. Natural gas is mainly methane and other light hydrocarbons, formed in similar settings and burns cleanly compared to coal and oil. Other options mix categories that aren’t the standard trio: peat is an early stage of coal formation, wood is biomass, and uranium/thorium are nuclear fuels; hydrogen and ethanol are not fossil fuels.

Fossil fuels are non-renewable energy sources formed over millions of years from ancient organic matter buried and transformed by heat and pressure. The three main types are coal, oil, and natural gas. Coal is a solid fuel from ancient plant material, rich in carbon and used for electricity and steel. Oil, or petroleum, is a liquid hydrocarbon formed from microscopic organisms and is the primary source for fuels and many chemicals. Natural gas is mainly methane and other light hydrocarbons, formed in similar settings and burns cleanly compared to coal and oil.

Other options mix categories that aren’t the standard trio: peat is an early stage of coal formation, wood is biomass, and uranium/thorium are nuclear fuels; hydrogen and ethanol are not fossil fuels.