GK
WORLD GEOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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because the greenhouse effect blocks the sun’s rays
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because earth is tilted on its axis
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because volcanic eruptions cloud the sky
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because of climate variations
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Detailed explanation-1: -As Earth orbits the Sun, its tilted axis always points in the same direction. So, throughout the year, different parts of Earth get the Sun’s direct rays. Sometimes it is the North Pole tilting toward the Sun (around June) and sometimes it is the South Pole tilting toward the Sun (around December).
Detailed explanation-2: -The earth’s spin axis is tilted with respect to its orbital plane. This is what causes the seasons. When the earth’s axis points towards the sun, it is summer for that hemisphere. When the earth’s axis points away, winter can be expected.
Detailed explanation-3: -The Earth is spherical in shape. So only one half of the Earth gets sunlight at a time. The portion facing the Sun experiences day and the other portion experiences night.
Detailed explanation-4: -The tilt of Earth’s axis is the main cause of the seasons. If Earth had no tilt, then the length of daylight and the intensity of solar heating seen by a person standing at a single place on the surface would be the same all year round.