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Ecosystems chapter 4

Name _____________________________
Period _____________________
Date ___________________________
Across
The movement of carbon from the nonliving environment into living things and back
An organism that can make organic molecules from inorganic molecules
The cycling of nitrogen between organisms, soil, water, and the atmosphere
The place where an organism usually lives
A triangular diagram that shows an ecosystem's loss of energy, which results as energy passes through the ecosystem's food chain
A group of various species that live in the same habitat and interact with each other
A community of organisms and their abiotic environment
The exchange of oxygen and CO2 between living cells and their environment
One of the steps in a food chain or food pyramid
An organism that feeds by breaking down organic matter from dead organisms
Down
A large region characterized by specific type of climate and certain types of plant and animal communities
The cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment
The variety of organisms in a given area
The replacement of one type of community by another at a single location over a period of time
An organism that eats other organisms or organic matter instead of producing its own nutrients
The average weather conditions in an area over a period of time