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MOTIONS OF THE EARTH. As you know that the earth has two types of motions, namely rotation and revolution. Rotation is the movement of the earth on its axis. The movement of the earth around the sun in a fixed path or orbit is called Revolution.
Imagine a line passing through the center of Earth that goes through both the North Pole and the South Pole. This imaginary line is called an axis. Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth’s rotation.
Choose a medium size ball for the Earth, a flashlight for the Sun. Model the revolution of the Earth around the Sun. Shine a flashlight directly onto the Northern Hemisphere when it is tilted towards the Sun, showing the angle of the sunshine and intensity.
During Earth’s one-year period of revolution, the tilt of its axis results in changes in the angle of incidence of the Sun’s rays at a given latitude; these changes cause variation in the heating of the surface.
27 gru 2012 · Download. Polar Motion - Three Views: Polar motion describes the motion of the Earth's spin axis (shown in orange) with respect to the geographic north and south poles (shown in blue). Over time, the geographic poles appear to spin away from the spin axis when viewed from space and then back again.
Physics of the Earth The fourth edition of Physics of the Earth maintains the original philosophy of this classic textbook on fundamental solid Earth geophysics, while being completely revised and up-dated by Frank Stacey and his new co-author Paul Davis. Building on the success of previous editions, which have served gen-
