What are the numbers and letters on the bottom and side of a grid map called?

The Prime Meridian divided the Earth into ________________.

How many hemispheres are there?

The equator passes through which 2 continents?

Alphanumeric grids are used to identify _______________.

Which imaginary lines go horizontally around the Earth?

Which imaginary lines go vertically around the Earth?

The international date line is _______________________________.

Use the coordinate map on the front page of your newspaper to answer this question. What continent is located at G,18?