EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Earthquakes occur constantly in the mantle, which causes the plates to move.
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The mantle is made up entirely of liquid rock, on which Earth’s crustal plates can float.
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Heavy metals in the mantle set up strong magnetic fields that attract and repel Earth’s plates.
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Temperature differences in the mantle set up convection currents that help to drive the movement of Earth’s plates.
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Detailed explanation-1: -The transfer of heat and material in the mantle helps determine the landscape of Earth. Activity in the mantle drives plate tectonics, contributing to volcanoes, seafloor spreading, earthquakes, and orogeny (mountain-building).
Detailed explanation-2: -Earth’s mantle plays an important role in the evolution of the crust and provides the thermal and mechanical driving forces for plate tectonics. Heat liberated by the core is transferred into the mantle where most of it (> 90%) is convected through the mantle to the base of the lithosphere.
Detailed explanation-3: -Convection occurs in the Earth’s mantle because it is the most efficient way for the Earth to cool or dispose of its deep-seated heat content.
Detailed explanation-4: -The mantle within the earth’s surface flows due to convection currents. These currents are mainly caused by a very hot material present in the deepest part of the mantle, which rises upwards, then cools, sinks, again and again, repeating the same process of heating and rising.
Detailed explanation-5: -Convection currents in the mantle will continue to circulate. Heat generated by the Earth’s core is continually transferred to the mantle through convection, driving circulation of molten rock. This molten material rises to the surface, cools down and sinks back towards the core.