Definition of biotic factor - A factor created by a living thing or any living component within an environment in which the action of the organism affects the life of another organism.
Definition of abiotic factor - A non-living chemical or physical factor in the environment, such as soil, pH, forest fire, etc.
Defintition of an ecosystem - All the living organisms and all the non-living components in a specific habitat, and their interactions.
Definition of producers - Autotrophic organisms that convert light energy to chemical energy, which they then supply to consumers.
Definition of consumers - living organisms that feed on other living organisms.
Definition of decomposers - Organisms that feed on dead organic matter, releasing molecules, minerals and energy that then become available to other living organisms in that ecosystem.
Definition of trophic level - the level at which an organism feeds in a food chain