What is coal? How is it formed?
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Answer:
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. ... Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.
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Answer:
coal is a black,porous, hard substance.
Explanation:
it is formed by the burning of trees deep into earth for million years
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