GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which BEST describes the movement of the plates that make up Earth’s surface over million of years?
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They have never moved
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They have been continually moving
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They stayed the same millions of years but are now moving
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They moved for millions of years but have now stopped.
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Explanation:
Detailed explanation-1: -Plate tectonics is the theory that Earth’s outer shell is divided into large slabs of solid rock, called “plates, ‘’ that glide over Earth’s mantle, the rocky inner layer above Earth’s core.
Detailed explanation-2: -Convection currents drive the movement of Earth’s rigid tectonic plates in the planet’s fluid molten mantle. In places where convection currents rise up towards the crust’s surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig. 7.21).
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