Env. Sys. Ch 5 Sec 1 & 2 Vocab Review

Front

An organism that creates organic molecules from inorganic ones; a photosynthetic or chemosynthetic autotroph, serving as the basic food source in an ecosystem.

Back

producer

Front

Diagram showing feeding relationships in an ecosystem

Back

food web

Front

Movement of carbon between nonliving and living things

Back

carbon cycle

Front

Nitrogen circulation in air, soil, water, plants, and animals.

Back

Nitrogen cycle

Front

Process by which plants, algae, and some bacteria use sunlight, CO2, and water to produce carbohydrates and oxygen.

Back

photosynthesis

Front

Cyclic movement of phosphorus in various forms from environment to organisms and back.

Back

phosphorus cycle

Front

An organism that consumes other organisms or organic matter instead of producing its own nutrients.

Back

consumer

Front

Bacteria that convert atmospheric nitrogen into ammonia

Back

Nitrogen-fixing bacteria

Front

Step in a food chain or pyramid; includes producers and consumers.

Back

trophic level

Front

Organism that breaks down organic matter from dead organisms

Back

decomposer