Answer: Option [C]The correct answer is Bituminous. In coal-fired power plants, bituminous coal, subbituminous coal, or lignite is burned. The heat produced by the combustion of the coal is used to convert water into high-pressure steam, which drives a turbine, which produces electricity.
Answer: Option [B]The correct answer is Seismic scale. Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at a given location.
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Answer: Option [C]The removal of curved plates of rocks layer by layer due to mechanical weathering is called exfoliation. Exfoliation is a form of mechanical weathering in which curved plates of rock are stripped from rock below. This results in exfoliation domes or dome-like hills and rounded boulders. Exfoliation domes occur along planes of parting called joints, which are curved more or less parallel to the surface.
Answer: Option [B]Mid-ocean ridge is formed due to the plate movement which is called Divergent movement. Most active divergent plate boundaries occur between oceanic plates and exist as mid-oceanic ridges. Divergent boundaries also form volcanic islands which occur when the plates move apart to produce gaps which molten lava rises to fill.
Answer: Option [B]The correct answer is Movement of plates of earth, which float on the hot volcanic mantle below the Earth's surface.
