1	relative location		_____	extra fourths of a day are combined every four years as February 29th
2	orbit		_____	Earth takes 365.25 days to make one complete circuit around sun
3	solar system		_____	study of the Earth and its people
4	absolute location		_____	group of satellites that gives out radio signals that record exact location
5	equinox		_____	eight planets, thousands of smaller bodies, and the sun make this
6	Tropics		_____	period of 100 years
7	environment		_____	day that falls midway between two solstices. Day and night hours equal
8	winter solstice		_____	exact spot on Earth where a geographic feature is found
9	Geographic Information System		_____	an organisms natural surroundings
10	geography		_____	day that has most hours of sunlight
11	axis		_____	planets that follows its own path around the sun
12	rotate		_____	a feature can be found compared to the other features around it
13	summer solstice		_____	imaginary line that passes through center of Earth between North and South Pole
14	century		_____	planets that spin on their axes as they orbit the sun
15	revolution		_____	period of 1,000 years
16	leap year		_____	a day with the fewest hours of sunlight
17	Global Positioning System		_____	area between the Tropic of Cancer and Tropic of Capricorn
18	millenium		_____	period of 10 years
19	atmosphere		_____	layer of oxygen and gases that surround the Earth
20	decade		_____	computer hardware and software that gathers, stores, organizes information about geography