All life forms (both plants and animals) form this sphere:

Water (in all of its forms) create this sphere:

The gases that surround the Earth make up this sphere:

The conditions in a certain geographic area over a LONG period of time is known as:

The atmospheric conditions in a particular area over a SHORT period of time:

One complete spin of the Earth on its axis is known as:

One complete trip of the Earth around the Sun is known as:

It takes __________ days for the Earth to complete it's revolution around the Sun.

What two gases make up a large amount of the Earth's atmosphere?

Hurricanes are tropical cyclones that form from the heating of warm air over what ocean?