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Chapter 20 Vocabulary

Across
The parts of Earth and the surrounding atmosphere where there is life.
An organism that cannot make its own food and gets energy by consuming others.
Non-living things in an ecosystem
An organism that uses an outside energy source, such as the sun, and produces its own food.
A model that shows how energy flows in an ecosystem through feeding relationships
A relationship in which one organism benefits and the other is harmed.
The size of a population compared to the amount of space available.
The potential growth of a population if it could grow in perfect conditions with no limiting factors
The long-term average weather conditions that occur in a particular region
All the populations living in an ecosystem at the same time.
A model that shows the amount of energy available in each link of a food chain.
Down
A relationship where both organisms benefit
A factor that can limit the growth of a population
A model of energy transfer that can show how the food chains in a community are interconnected.
A relationship where one benefits and the other is neutral.
the demand for resources, such as food, water, and shelter, in short supply in a community
All the living and non-living things in a given area
Living or once-living thing in an ecosystem
A close, long-term relationship between two species that usually involves an exchange of food and energy
The way a species interacts with abiotic and biotic factors to obtain food, shelter, etc.
All the organisms of the same species that live in the same area at the same time.
The place within an ecosystem where an organism lives.