The term for the imaginary line that divides the Earth into the Northern and Southern Hemispheres is the Equator. The Equator is an imaginary line located at 0 degrees latitude and is equidistant from the North and South Poles. It plays a crucial role in the Earth's climate, marking the transition between tropical and temperate regions. The Equator experiences consistent temperatures and daylight hours throughout the year, contributing to the lush biodiversity found in equatorial regions. Additionally, it serves as a reference point for navigation and geography, influencing global weather patterns and ocean currents.