Abiotic Factors , non-living (physical) components of an ecosystem, Biomass, the total mass of organisms in a given area, Biotic Factors, living components of an ecosystem, Carbon Cycle, process through which carbon is cycles through the atmosphere, the Earth, and plants and animals, Community , all the living organisms in an area, Competition , two or more organisms contesting a resource, Consumers, organisms that have to eat other organisms to gain energy, Decomposers, organisms that gain their energy by feeding on dead or decaying material, Detritivores, small animal which breaks down organic matter into small pieces, Ecosystems , all the living organisms and physical conditions present in an area, Egestion, removal of undigested waste from an organism, Excretion , removal of waste products from an organism, Habitat, the place in which an organism lives, Interdependence , how different organisms depend on each other within a community, Mutualism, relationship in which both organisms benefit, Parasitism, relationship in which the parasite gains and the host is harmed, Population , the number of organisms of a species living in an area, Predation , relationship between a predator and a prey organism. Predator depends on prey, normally for food, Producers, organisms that make their own food through the process of photosynthesis, Pyramid of Biomass, diagram representing the amount biomass present at each trophic level of a food chain, Tropic Level, feeding level in a food chain, Urine , liquid containing water, urea, and other waste substances.

B4.1 Ecosystems

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