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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