EARTH SCIENCE
VOLCANOES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The continental plates slides under the oceanic plate causing the the crust to melt. The less dense magma works its way to the earth’s surface causing volcanoes to form on the oceanic plate.
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The oceanic plate slides under the continental plate causing the crust to melt. The less dense magma works its way to the earth’s surface causing volcanoes to form on the continental plate.
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The continental plate collides with the oceanic plate and mountains are formed, much like Mt. Everest.
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The continental plate collides with the oceanic plate and both plates are sucked under the earth causing giant cracks in the surface much like the rift in Africa.
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Detailed explanation-1: -Subduction occurs when two tectonic plates meet and one moves underneath the other (Fig. 7.23). Oceanic crust is primarily composed of basalt, which makes it slightly denser than continental crust, which is composed primarily of granite.
Detailed explanation-2: -When an oceanic plate converges with a continental plate, the oceanic crust will always subduct under the continental crust; this is because oceanic crust is naturally denser. Convergent boundaries are commonly associated with larger earthquakes and higher volcanic activity.
Detailed explanation-3: -Collision Zones and Mountains Instead, a collision between two continental plates crunches and folds the rock at the boundary, lifting it up and leading to the formation of mountains and mountain ranges.
Detailed explanation-4: -What happens when oceanic crust collides with continental crust? Subduction occurs as the denser oceanic plate sinks beneath the less dense continental plate. What happens when two plates carrying contintental crust collide? Neither plate subducts instead the collision squeezes the crust into mountain ranges.
Detailed explanation-5: -A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other, a process known as subduction. The subduction zone can be defined by a plane where many earthquakes occur, called the Wadati–Benioff zone.