Massachusetts Tests for Educator Licensure (MTEL) Practice Test 2025 - Free Educator Licensure Practice Questions and Study Guide

The Prime Meridian is significant primarily because it is crucial for navigation and geopositioning. As the designated 0 degrees longitude, it serves as a reference point from which all other longitudes are measured, both east and west. This standardization is essential for accurately determining locations on the Earth's surface, whether for global navigation, aviation, maritime routes, or geographic information systems (GIS). By establishing a consistent framework, the Prime Meridian enables various systems to communicate and operate effectively across the globe.

The other choices do touch upon aspects of geography but do not accurately reflect the importance of the Prime Meridian. For instance, it does not represent 0 degrees latitude since latitude is measured north and south of the Equator. While the Prime Meridian does extend vertically through the globe, this characterization does not encompass its significance. Moreover, it does not mark a boundary between tropical and temperate zones, as these zones are expressed in terms of latitude rather than longitude.