Which of the following is true about the International Date Line?

1. It goes zig-zag at two points.
2. The date changes as one moves across it.
3. It is opposite the Prime Meridian.
4. All of the above.

A great circle is a circle drawn on the surface of a sphere with radius :

1. equal to the radius of the sphere.
2. equal to half the radius of the sphere.
3. larger than the radius of the sphere.
4. less than the radius of the sphere.

In each hemisphere for which latitude the length of the circle is half the length of the Equator?

1. 30°
2. 45°
3. 60°
4. 90°

The total number of the parallels of Latitude are ……………. .

1. 180
2. 182
3. 183
4. 181