Answer:
Option (C)
Explanation:
The mid-oceanic ridges are the submarine mountains that are formed in a divergent plate boundary. In this region, the oceanic crust gradually rises due to the movement of the magma towards the surface. This movement of magma upward is due to the formation of convection current in the mantle, where these currents are generated because of the heat energy provided from the interior of the earth.
These are the region, where the temperature is extremely high and the rocks are in the form of liquid (magma) and hot rocks are less denser than the cold rocks, so they move upward. This motion of magma upward and erupting on the seafloor leads to the uprising of the oceanic crust.
Thus, the correct answer is option (C).
It is the lithosphere that is broken into tectonic plates, which undergo some large-scale motions. The boundary regions between plates are aptly called “plate boundaries.” Based upon their motions concerning one another, these plate boundaries are of three kinds: divergent, convergent, and transform.
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Answer:
In increasing order of length
Option (1) < Option (2) < Option (3) < Option (4) < Option (5)
Explanation:
The earth rotates around its imaginary axis once every 24 hours.
The moon is the natural satellite of earth that orbits around the earth once every 28 days (approximately).
Seasons are the contrasting phenomenon that occurs on earth once every 3 months and is caused due to the tilt of the earth's axis.
Earth orbits around the sun once every 365 days.
The precision cycle of earth is approximately 26000 years (this means that there occurs 1° change every 72 years).
Thus, the time duration of each of the above can be arranged in an increasing order which is given below-
Option (1) < Option (2) < Option (3) < Option (4) < Option (5)
The answer is D. Magma pushing through the center of plates
