Sun is the ultimate source of fossil fuels. It was the sunlight of long ago that made plants grow, which were then converted into fossil fuels. Fossil fuels are energy-rich compounds of carbon which were originally made by the plants with the help of sun's energy (solar energy). Today when we burn coal, petroleum or natural gas, we are actually making use of the sunlight energy that was stored by the plants millions of years ago.
1. .............. is the ultimate source of fossil fuels.
a. Moon
b. Sun
c. Stars
d. Wind
2. Fossil fuels are energy rich compounds of .......
a. Carbon
b. Oxygen
c. Nitrogen
d. None of these
3. Today, when we burn fossil fuels, we are actually using ....... energy.
a. Wind
b. Tidal
c. Solar
d. None of these
4. It was the sunlight of long ago that made plants grow, which were then converted into ........
a. Fossil fuels
b. Dung cakes
c. Marshy lands
d. None of these
5. We are making use of sunlight energy that was stored by the plants ............. years ago
a. Millions
b. Hundreds
c. Thousands
d. None of these
