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Physics CBSE Live product
Class 8 (2025-26)
Keeping time with the skies
Calendar and its types
4.
Measurement of time and leap year
Question:
2
m.
Choose the best answer.
1.
On which periodic phenomenon is a year based?
Earth’s rotation
Sun’s rotation
Earth’s revolution
Moon’s rotation
2.
What is the main purpose of a leap year?
To adjust the extra quarter day in Earth’s revolution
To fix the rotation speed of Earth
To make the year shorter
To match the Moon’s revolution
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