Average, year-after-year conditions of temperature and precipitation in a particular region.

A biological (living) influence on organisms within an ecosystem.

The area where an organism lives along with the other biotic and abiotic factors in the area.

Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, and water vapor.

Warm climate zone that receives direct or nearly direct sunlight year round.

Physical, or nonliving, factors that shape an ecosystem are called _________________ factors.

Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.

Condition of Earth's atmosphere at a particular time and place.

Cold climate zone where the sun's rays strike the Earth at a very low angle.

ANY relationship in which two species live closely together.

Any necessity of life, including water, nutrients, light, food, or space.

Secondary succession occurs after a disturbance that destroys a community without destroying the soil.

Symbiotic relationship in which one species benefits and the other species is neither helped nor harmed.

Symbiotic relationship in which one species lives on or in another species and harms it.

No two species can occupy the same exact niche in the same habitat at the same time is known as the competitive _________________________ principle.

Interaction in which one organism captures and feeds on another organism.

Symbiotic relationship in which both species benefit.

Moderate climate zone between the polar zones and the tropics.