Question

Which of the following is the primary source of energy in fossil fuels?

• A. Moon
• B. Nuclear fusion
• C. Sun
• D. None of these

Hint:

All conventional fuels (wood, coal, petrol, gas) trace back to solar energy, showing the Sun is the ultimate source of energy on Earth.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Fossil fuels (coal, petroleum, natural gas) are formed from dead plants and animals buried under the Earth millions of years ago. The energy stored in them ultimately comes from sunlight, because plants used sunlight to carry out photosynthesis. Step 2: Analysis of Options:
Moon: Provides no energy for fossil fuel formation.
Nuclear fusion: Occurs inside the Sun but is not directly cited as the process here.
Sun: Plants captured solar energy through photosynthesis, and this energy got stored in biomass, which eventually turned into fossil fuels.
Step 3: Detailed Explanation:
Thus, when we burn coal, oil, or gas, we are actually releasing ancient solar energy stored in chemical bonds. This is why the Sun is considered the original source of fossil fuel energy.
Step 4: Final Answer:
The primary source of energy in fossil fuels is the Sun.