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Which one of the following correctly explains the change in seasons on

June 1, 2025 by rawan239

Which one of the following correctly explains the change in seasons on Earth ?

Tilt of the Earth's axis

Rotation of the Earth on its own axis

Revolution of the Moon around the Sun

Interaction of the Earth with other planets

This question was previously asked in

UPSC CAPF – 2023

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The tilt of the Earth’s axis correctly explains the change in seasons on Earth.

The primary cause of the change in seasons on Earth is the tilt of the Earth’s rotational axis relative to its orbital plane (the plane of Earth’s path around the Sun), which is approximately 23.5 degrees. As the Earth revolves around the Sun over the course of a year, the tilted axis means that different parts of the Earth receive more direct sunlight at different times. When a hemisphere is tilted towards the Sun, it receives more direct sunlight and experiences summer, with longer days. When it is tilted away from the Sun, it receives less direct sunlight and experiences winter, with shorter days. The Earth’s revolution around the Sun is necessary for the tilt to cause different hemispheres to be oriented towards or away from the Sun over time.

The Earth’s rotation on its own axis causes the cycle of day and night. The revolution of the Moon around the Earth causes phases of the Moon and tides. The interaction of the Earth with other planets has minor gravitational effects but does not cause the regular seasonal changes. The slight eccentricity of Earth’s orbit means the Earth is closer to the Sun in January (perihelion) and farther in July (aphelion), which has a small influence on temperature but is secondary to the effect of the axial tilt in causing the seasons.

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