_____________ must always be divisible by 7 1/2^o.

IDL is the ________ line.

The time fixed with reference to Greenwich is called the _____________.

The network of parallels and meridians on the surface of a globe is known as the __________.

______________ zones receives the maximum amount of heat.

The temperature is very low in __________.

_____________ is an area where all clocks show the same time.

The sun is never overhead in ____________.

The Prime Meridian which passes through ___________.

Lines of longitude are referred to as ____________.