CBSE Class 8 Answered
why coal is only made in abscence of air?which bacteria make it?
Asked by rkghunawat1981 | 21 Aug, 2018, 09:57: PM
Expert Answer
Formation of Coal
- Coal was formed by the decomposition of large land plants and trees buried under the Earth about 300 million years ago.
- About 300 million years ago, the Earth had dense forests in the low-lying wet areas.
- Due to natural calamities like earthquakes, volcanoes, floods, etc. these forests got buried under the surface of the Earth.
- As more soil got deposited on them, they were compressed.
- As a result, the temperature also rose as they sank deeper and deeper.
- Due to high pressure and temperature and the absence of air, the wood of the buried forest plants and trees slowly got converted into coal.
- The slow process by which the dead plants buried under the Earth have become coal is called as carbonisation.
- Since coal was formed from the remains of the plants, it is called a fossil fuel.
Answered by Ramandeep | 23 Aug, 2018, 11:05: AM
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