EARTH SCIENCE
EARTHQUAKES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Earth’s solid surface layer rotates faster than the layers under it
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Areas of Earth’s solid surface layer are under great pressure from ocean water
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Earth’s solid surface layer sits on a moving, semiliquid layer
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Areas of Earth’s solid surface layer are thicker and heavier than others
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Detailed explanation-1: -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-2: -Hot magma rises from the mantle at mid-ocean ridges, pushing the plates apart. Earthquakes occur along the fractures that appear as the plates move apart.
Detailed explanation-3: -These tremors are caused by disturbances caused in the tectonic plates. These plates are deep down inside the uppermost layer of the earth called the crust.
Detailed explanation-4: -Stress builds up and the rocks slip suddenly, releasing energy in waves that travel through the earth’s crust and cause the shaking that we feel during an earthquake.