Blast Through IGCSE Physics in 2026 – Ace Your Exam Adventure!

The Earth takes approximately 365 days to complete one full orbit around the Sun, which defines a year in our calendar system. This duration is the result of Earth's rotational and orbital dynamics, where it follows an elliptical path around the Sun due to gravitational forces. The concept of a year is fundamental in astronomy and is based on the Earth's consistent and predictable orbit. The slight variation in the number of days is addressed by leap years, which add an extra day every four years to account for the additional approximately 0.25 days it takes Earth to complete a orbit.

The other choices do not correspond to the scientifically accepted length of a year based on the Earth's orbital period. A duration of 360 days, for example, would not account for the additional fraction of the day, leading to discrepancies in our calendar over time. Similarly, 380 and 350 days significantly deviate from the recognized time frame and would also disrupt the synchronization with the seasons and the lunar cycles as observed on Earth.