One's position in relation to true north, or to the points of the compass.

The line of longitude that divides the Earth into the eastern and western hemisphere. It measures zero degrees longitude.

Areas of the Earth with common characteristics

A measure of distance east or west of the Prime Meridian. (the lines run north to south)

A measure of distance north or south of the Earth's equator. (the lines run east to west)

The height of something in relation to sea level.

The line of latitude that divides the Earth into the northern and southern hemisphere. It measures zero degrees latitude.

The study of people and their environment.

A half of the Earth's surface.

One of the 7 large landmasses on Earth.

To study something closely and carefully.

The spin of the Earth on its axis (about 24 hours).

The movement of the earth around the sun (about 365 days).