CTET PAPER II 2019 · PYQ · Earth's Motion / Geography · medium
Seasons occur due to which of the following reasons?
A.Axis of the Earth makes an angle of 66½° with its orbital plane.
B.Tropic of Capricorn receives direct rays of the sun, falling vertically at 23½° S.
C.Revolution of the Earth and inclination of its axis in the same direction.✓ Correct
D.Circle of illumination caused due to rotation of the earth around its axis.
Explanation
Seasons occur due to the combined effect of the Earth's revolution around the Sun and the inclination of its axis (tilted at 23.5° from the perpendicular to its orbital plane). As Earth revolves, different parts receive direct sunlight at different times of the year. The axis maintains its inclination in the same direction throughout the orbit, causing the Northern and Southern hemispheres to experience opposite seasons. Hence option (3) is correct.
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