Measurement of time and leap year — task. Physics CBSE Live product, Class 8 (2025-26).

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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