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.