there are discontinued in the interior of the earth explain
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Seismologists, scientists who study earthquakes and related phenomenon, have discovered a way to use earthquake waves to deduce the structure of the earth's interior. Geologists cannot directly study anything more than the outermost 5-8 miles of the crust, leaving a vast majority of the earth unobserved.
However, they have found that after an earthquake, waves of energy travel not only through the rocks of the earth's surface but also through the center of the earth. The waves that pass through the earth travel at different speeds depending on the rock type, its temperature, and its pressure. Following an earthquake, scientists at stations all around the earth record the time and intensity of the waves that arrive at their location. Using information about the arrival and behavior of the waves, scientists can deduce a picture of the different layers of the earth's interior. This is how scientists have developed a 5-layer model of the earth consisting of a solid inner core, a liquid outer core, a liquid mantle, a taffy-like upper layer, all underneath the outer crust.
A divergant boundary occurs when two tectonic plates move away from each other. Along these boundaries, lava spews from long fissures and geysers spurt superheated water. Frequent earthquakes strike along the rift. Beneath the rift, magma - molten rock - rises from the mantle. It oozes up into the gap and hardens into solid rock, forming new crust on the torn edges of the plates. Magma from the mantle solidifies into basalt, a dark, dense rock that underlies the ocean floor. Thus at divergent boundaries, oceanic crust, made of basalt, is created.
However, they have found that after an earthquake, waves of energy travel not only through the rocks of the earth's surface but also through the center of the earth. The waves that pass through the earth travel at different speeds depending on the rock type, its temperature, and its pressure. Following an earthquake, scientists at stations all around the earth record the time and intensity of the waves that arrive at their location. Using information about the arrival and behavior of the waves, scientists can deduce a picture of the different layers of the earth's interior. This is how scientists have developed a 5-layer model of the earth consisting of a solid inner core, a liquid outer core, a liquid mantle, a taffy-like upper layer, all underneath the outer crust.
A divergant boundary occurs when two tectonic plates move away from each other. Along these boundaries, lava spews from long fissures and geysers spurt superheated water. Frequent earthquakes strike along the rift. Beneath the rift, magma - molten rock - rises from the mantle. It oozes up into the gap and hardens into solid rock, forming new crust on the torn edges of the plates. Magma from the mantle solidifies into basalt, a dark, dense rock that underlies the ocean floor. Thus at divergent boundaries, oceanic crust, made of basalt, is created.
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