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What would happen if the earth wouldn rotate? Social Science - CBSE CLASS 6TH
What would happen if the earth wouldint rotate?
Half of the planet would almost continuously face the heat of the Sun, while half would face the cold of space.
Life could continue in a narrow twilight zone between the hot and cold halves. But this twilight zone would slowly creep around the planet over the period of a year, as the Earth did its annual orbit around the Sun.
To make it easier to work out what would happen, let's pretend the oceans don't freeze on the cold side, or evaporate on the hot side. And let's look only at centrifugal force, which should really be called centripetal force.
Over several billion years, this force, which effectively pushes outwards, has made the planet a bit fatter around the middle. So the diameter of the Earth measured through the equator is today about 21.4 kilometres more than the diameter of the Earth measured through the poles.
But this bulge in the solid Earth took billions of years to slowly develop. This is because the solid matter moved only very slowly in response to the outward force caused by the spin of the planet.
But the liquid water in the oceans is far more mobile and responsive to forces. So the Earth's spin has pushed up this liquid water to an 'abnormal' elevation of about eight kilometres.
In other words, at the equator, thanks to the spinning Earth, the water has been pushed up some eight kilometres higher than in the case of the Earth having no spin.
But today, on the entire equator, the deepest part of the oceans is only about 5.75 kilometres.
So take away the spin and you take away all water at the equator.
If the Earth were to stop spinning on its axis, gradually the oceans would migrate towards the poles from the equator. At first, only small regions of terra firma around the equator would rise out of the retreating waters.
Eventually, there would be a huge mega-continent wrapped continuously around the Earth at the equator. You could travel around the Earth on the equator and stay entirely on dry land—ignoring the freezing cold on the night side, and the searing heat on the day side.
The water that left the equatorial regions would have to go somewhere, and that 'somewhere' would be the poles. There would be two totally disconnected polar oceans on each side of the equatorial mega-continent.
In the north, Canada would be entirely underwater. And roughly following the line of the border of current-day USA and Canada, all of Greenland, as well as the northern plains of Siberia, Asia and Europe would be underwater. But Spain would mostly stay above water.
2.The effects would be less dramatic, but equally devastating, in this alternative case. With no outward centripetal force to compensate for the strong inward tug of the Sun’s gravity, Earth would begin to fall towards the Sun.
Contributed by, Satya Shiromani
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