how coal was formed ? what is this process called?
please answer this question in 70 words
Answers
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. Coal, which is mainly carbon, on heating produces mainly carbon dioxide gas and a lot.
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Answer:
Coal:
1. It a black colored hard substance. It is a sedimentary rock that burns.
2. It is composed of carbon, hydrogen, oxygen and minor amounts of sulphur and nitrogen.
3. The major types of coal are Anthracite, bituminous, lignite.
4. Anthracite is the hardest coal with higher carbon concentration and energy.
5. Lignite is the softest coal. It has low carbon concentration but high oxygen and hydrogen concentrations.
6. Bituminous has moderate hardness and concentration of carbon.
Formation of Coal
1. Many years ago, the dense forests present in low lying areas of wetlands got buried down underneath the soil due to natural calamities like flooding, earthquakes, etc.
2. They got compressed with time, as more soil deposited on them.
3. They descended deeper and deeper and encountered high temperature and pressure.
4. These dead plants slowly got converted into coal under high temperature and pressure.
5. The main constituent of coal is carbon, therefore, this process of conversion of dead plants into coal is termed as carbonization