Abiotic factor: A nonliving part of an organism's habitat .
Biotic factor: A living or once living part of an organism's habitat.
Ecosystem: The community of organisms that live in a particular area along with their nonliving enviroment.
Habitat: An enviroment that provides the things a specific organism needs to live, grow, and reproduce.
Organism: A living thing.
Population: All the members of one species living in the same area.
Community :All the different populations that live in a particular area.
Classification: The process of grouping things based on similarities.
Taxonomy: The scientific study of how living things are classified.