1	weather		_____	warm limate zone that receives direct or nearly diret sunlight year round
2	climate		_____	biological incluence on organisms in an ecosystem
3	greenhouse effect		_____	symbiotic relationship in which one organism lives in or on another organism (the host) and consequently harms it
4	polar zone		_____	full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions
5	temperate zone		_____	ecological rule that states that no two species can occupy the same exact niche in the same habitat at the same time
6	tropical zone		_____	condition of Earth's atmosphere at a particular time and place
7	biotic factor		_____	succession that occurs on surfaces where no soil exists
8	abiotic factor		_____	the area where an organism lives, including the biotic and abiotic factors that affect it"
9	habitat		_____	natural situation in a which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases"
10	niche		_____	physical, or nonliving, factor that shapes an ecosystem"
11	resource		_____	moderate climate zone between the polar zones and the tropics
12	competitive exlusion principle		_____	gradual change in living communities that follows a disturbance
13	predation		_____	symbiotic relationship in which both species benefit from the relationship
14	symbiosis		_____	symbiotic relationship in which one member of the associations benefits and the other is neither helped nor harmed
15	mutualism		_____	any necessity life, such as water, nutrients, light, food, or space"
16	commensalism		_____	cold climate zone where the sun's rays strike Earth at a very low angle
17	parasitism		_____	succession following a disturbance that destroys a community without destroying the soil
18	ecological succession		_____	relationship in which two species live closely together
19	primary succession		_____	first species to populate an area during primary succession
20	pioneer species		_____	interaction in whih one organism captures and feeds on another organism
21	secondary succession		_____	average, year-after-year conditions of temperature and particular region"