2006-11-13 10:49:09 · 11 answers · asked by ~*KARI*~ 1 in Science & Mathematics ➔ Earth Sciences & Geology
It is a non-renewable fossil fuel. Oil and natural gas are also fossil fuels.
2006-11-13 10:52:21 · answer #1 · answered by Em_butterfly 5 · 0⤊ 0⤋
TYPES OF COAL
Coal is a very complex and diverse energy resource that can vary greatly, even within the same deposit. In general, there are four hasic varieties of coal, which are the result of geologic forces having altered plant material in different ways. These varieties descended from the first stage in the formation of coal: the creation of peat or partially decomposed plant material.
Lignite: Increased pressures and heat from overlying strata caused buried peat to dry and harden into lignite. Lignite is a brownish-black coal with generally high moisture and ash content and lower heating value. However, it is an important form of energy for generating electricity, particularly in the American Southwest.
Subbituminous: Under still more pressure, some lignite was changed into the next rank of coal: subbituminous. This is Coal is a combustible mineral formed from the remains of trees, ferns and other plants that existed and died during the time of the dinosaurs. A dull black coal with a higher heating value than lignite that is used primarily for generating electricity and for space heating.
Bituminous: Even greater pressure resulted in the creation of bituminous, or "soft" coal. This is the type most commonly used for electric power generation in the U.S. It has a higher heating value than either lignite or subbituminous, but less than that of anthracite.
Anthracite: Sometimes also called 'hard coal," anthracite was formed from bituminous coal when great pressures developed in folded rock strata during the creation of mountain ranges. Anthracite has the highest energy content of all coals and is used for space heating and generating electricity.
2006-11-17 04:14:56 · answer #2 · answered by Krishna 6 · 0⤊ 0⤋
No coal, the place coal comes from, Coal is formed from timber that have fallen and lined up below floor for hundreds of years, no timber on the moon, means no coal. Beings there are signs and indicators of Volcano's on the moon, there is an extremely stable risk there is sulfur on the moon. and there is not any liquid water on the moon, all of the water on the moon is locked up as ice.
2016-12-14 06:38:44 · answer #3 · answered by woolf 4 · 0⤊ 0⤋
Its a non renewable resource or fossil fuel
2006-11-13 11:38:28 · answer #4 · answered by dang_terr 3 · 0⤊ 0⤋
It is a natural non-renewable resource.The dead trees,animals and etc when buried in land due to some natural calamities remain for years and years.later they become coal.they are the source for diamond,and also used in thermal plants.
2006-11-13 12:53:03 · answer #5 · answered by snegasmiles 1 · 0⤊ 0⤋
Non-renewable since once you use coal it combusts and you can't use it again
2006-11-13 10:51:12 · answer #6 · answered by gordon_benbow 4 · 0⤊ 1⤋
Coal is my friend and she is a hot chick
2006-11-13 11:20:09 · answer #7 · answered by Anonymous · 0⤊ 1⤋
it is a non renewable resource
2006-11-13 15:10:25 · answer #8 · answered by Benson V 1 · 0⤊ 0⤋
non renewable fossil fuel
2006-11-13 10:52:22 · answer #9 · answered by runner1590 2 · 0⤊ 0⤋
as natural gas & fossil fuels ts a nonrenewable source of energy i.e it cant be used again & again.
2006-11-13 11:23:53 · answer #10 · answered by Vidhya n 2 · 0⤊ 0⤋