Why are coal and petroleum called fossil fuels Class 8?
Because of the higher amount of pressure and temperature, the dead and decaying matter changed to fossils and they both are used as fuels. Hence, coal and petroleum is termed as fossil fuels. The fossil fuels which we are using now formed from the decay of plants and animals buried under the earth.
Why are they called fossils?
The word fossil comes from the Latin word fossus, meaning “having been dug up.” Fossils are often found in rock formations deep in the earth. Fossilization is the process of remains becoming fossils. Fossilization is rare. Most organisms decompose fairly quickly after they die.
Why is coal the best source of energy?
Cheapest source of energy. It is by far cheaper than nuclear, natural gas, oil. … Unlike other forms of energy (nuclear, natural gas, oil, hydroelectric), coal provides many jobs in removing coal from the earth, transporting it to the utility, burning it, and properly disposing of coal ash.
What is coal composed of?
Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity. It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning).
Is coal still being formed?
Coal is very old. The formation of coal spans the geologic ages and is still being formed today, just very slowly. Below, a coal slab shows the footprints of a dinosaur (the footprints where made during the peat stage but were preserved during the coalification process).
Is coal a cheap energy source?
Of all the fossil-fuel sources, coal is the least expensive for its energy content and is a major factor in the cost of electricity in the United States.
Is coal a good way to generate electricity?
Burning coal is the most cost-effective and energy efficient way of generating electricity.