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CH. 21 Vocabulary

Across
Population that has died out
Population at risk but is not yet endangered
Moving into an area
Size of a population compared to the amount of space available
Parts of the earth and the atmosphere where there is life
Number of offspring produce d over a given period of time
Place within an ecosystem where an organism lives
Organism that gets its energy from the sun
Moving out of an area
Relationship in which both organisms benefit
Down
Growth of a population in perfect conditions with not limiting factors
Largest number of one species that an environment can support
Population that is at risk of extinction
Relationship between two species that involves exchanging food and energy
All the populations of different species living int her same area at the same time
all the organisms of one species that live in the same area at the same time
Anything that restricts the size of a population
To guess the size of something
Symbiotic relationship that benefits one but does not harm or benefit another
Organism that survives by hunting
Struggle among organisms for the same resources
Relationship in which one species harms another species
What an organism does in the habitat
Organism that is eaten by a predator