BECE Social Studies 2023 Paper

Concept:Lines of longitude are used to calculate time because the Earth rotates through them relative to the Sun.Solution:• The Earth rotates $360^\circ$ in about 24 hours.• Therefore, each $15^\circ$ of longitude represents a one-hour difference in time.• This is why longitudes, especially the Prime Meridian, help determine time zones.Answer:Option A (longitudes)