What imaginary line encircles the earth?

What imaginary line encircles the earth?

• A. Prime meridian
• B. Equator
• C. Tropic of Cancer
• D. Arctic Circle

Answer: (B)

The equator is the imaginary line that encircles the Earth, dividing it into the Northern and Southern Hemispheres. It is located at 0 degrees latitude and is equidistant from the North and South Poles, making it the longest line of latitude. The significance of the equator lies not only in its geographical implications but also in its climate zones, where areas near the equator typically experience a tropical climate with little temperature variation throughout the year.

In contrast, the prime meridian serves as the reference line for measuring longitude at 0 degrees but does not encircle the Earth in the same way that the equator does. The Tropic of Cancer and the Arctic Circle are also important lines of latitude, marking specific latitudes related to solar positions and climate, but they do not divide the Earth into equal halves as the equator does.