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Chapter 22 Section 1
Living things and the environment
12
Science
6th Grade
10/06/2011

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Term
ecosystem
Definition
all the living and nonliving things that interact in a particular area.
Term
biotic factors
Definition
the living parts of an ecosystem; plants, animals, fungi, bacteria, protists, etc.
Term
abiotic factors
Definition
the nonliving parts of an ecosystem;
water, soil, temperature, sunlight,
oxygen, pollution, etc.
Term
habitat
Definition
the place where an organism lives & that provides the things the organism needs; food, water, shelter, etc.
Term
population
Definition
all the members of one species living in a particular area;
for example: a population of ladybugs.
Term
community
Definition
all of the different populations that live together in an area.
Term
ecology
Definition
the study of how living things interact with each other and their environment.
Term
predator
Definition
an organism that hunts, kills, and eats another organism.
Term
niche
Definition
the job or role of an organism in it's ecosystem; for example - a lion is a predator.
Term
prey
Definition
an organism that is hunted, killed, and eaten bu another organism.
Term
adaptation
Definition
a behavior or body structure that enables an organism to survive and reproduce in their ecosystem.
Term
population density
Definition
the number of individuals in a particular area; for example there are approximately 20 wolves per 500 square miles in Yellowstone National Park.
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