Meridians of longitude identify degrees east and west of the. These lines are/are not (circle) scientifically based. Why/why not?

Ateam of researchers calculates that a glacier will melt completely away in the next 100 years. which land structure will most likely be left behind after the glacier melts?

How many square miles is the big island of hawaii

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called