EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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At a convergent plate boundary, the continental crust collides with another continental crust to form volcanoes.
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At a convergent plate boundary, the oceanic crust is pulled beneath the continental crust, where magma forms and moves upward.
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At a divergent plate boundary, the pressure of seawater rushing into the oceanic crust rift creates a volcano.
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At a transform plate boundary, the crusts slide against each other to form magma by frictional heat.
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Detailed explanation-1: -Answer. Answer: B). At a convergent plate boundary, the oceanic crust is pulled beneath the continental crust, where magma forms and moves upward.
Detailed explanation-2: -Which of the following statements best describes the formation of volcanoes? At a convergent plate boundary, the continental crust collides with another continental crust to form volcanoes.
Detailed explanation-3: -Destructive, or convergent, plate boundaries are where the tectonic plates are moving towards each other. Volcanoes form here in two settings where either oceanic plate descends below another oceanic plate or an oceanic plate descends below a continental plate.
Detailed explanation-4: -The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries.
Detailed explanation-5: -At convergent boundaries magma is formed where water from a subducting plate acts as a flux to lower the melting temperature of the adjacent mantle rock. At divergent boundaries magma forms because of decompression melting. Decompression melting also takes place within a mantle plume.