EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Earthquakes, volcanoes, mountain ranges, deep ocean trenches.
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the shape of oceans.
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The location of the continents.
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During subduction, gravity pulls the denser plate edges downward into the mantle. this pulls the rest of the plat, causing it to move.
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Detailed explanation-1: -Convection currents transfer hot, buoyant magma to the lithosphere at plate boundaries and hot spots. Convection currents also transfer denser, cooler material from the crust to Earth’s interior through the process of subduction.
Detailed explanation-2: -Magma is the molten rock below the crust, in the mantle. Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth’s crust.
Detailed explanation-3: -At the consumption edges of the plate, the material has thermally contracted to become dense, and it sinks under its own weight in the process of subduction usually at an ocean trench. Subduction is the descending component of mantle convection. This subducted material sinks through the Earth’s interior.
Detailed explanation-4: -This occurs because the hot liquid rock within the mantle rises from deep within the Earth to the top of the mantle. As liquid rock cools, it goes downward. This cycle creates a motion on top and pushes around the plates floating on it.
Detailed explanation-5: -Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.