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22 terms

Science Chapter 4: Interactions of Life

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Population
is made up of all organisms of the same species that live in an area at the same time.
Community
are all the populations of all species living in an ecosystem
Food Chain
is a model of the feeding relationships amoung oraganisms
Examples of non-living features
an environment included water, temperature, soil and air
Habitat
the place in which an organism lives
Niche
an organism's role or position in its environment
A place where it fits in best
Producers
use the Sun to make energy-rich molecules
Consumers
Cannot make their own energy rich molecules.
Omnivores, herivores, carnivores and decomposers are all types of consumers
Herivores
are plant eaters
Carnivores
animals that eat other animals
Omnivores
eat plants and other animals
Predators
consumers that capture and eat other consumers
Prey
a consumer captured and eaten by other consumers predators. In the relationship between a raccoon and the fish in a stream, the raccoon is the predator. The presence of predators usually inceases the number of species that can live in an ecosytem.
Decomposers
Consume wasts and dead organisms. Decomposers help recycle once-living matter by breaking it down into simple compounds.
Symboiosis
Any close relationship between species is called symbiosis
Mutualism
Mutual
a symbiotic relationship in which both species benefit
Example of mutualism
an alga living in the tissue of a fungus
Commensalism
a symbiotic relationship in which one organsim benefits and the other is not affected
Example of Commensalism
a clown fish is protected by an anemone
Parasitism
a symboiotic relationship in which on organism benefits, but the other is harmed
Example of parasitism
a roundworm that lives in a puppy
Symbiotic relationship
close interaction between species in which one species lives in or on the other