Important Lines of Longitudes - SS1 Geography Lesson Note

Prime Meridian (0 degrees): This line passes through Greenwich, England and is used as the reference point for measuring longitudes. It's significant for defining time zones worldwide.

International Date Line (180 degrees): This line is located approximately opposite the Prime Meridian in the Pacific Ocean. Crossing this line leads to a change in the date. It's essential for keeping track of time and date changes when traveling east or west.

Source:(worldmapwithcountries.net)