How can we help?

You can also find more resources in our Help Center.

34 terms

8th Grade - Science Chapter 8 (WB)

STUDY
PLAY
adaptation
a characteristic that helps an organism survive in its habitat
behavioral adaptation
special behaviors that help organisms adapt to changes in their environment
biodiversity
describes the great variety of life-forms on earth or within a habitat
carnivore
a meat-eating animal
commensalism
a symbiotic relationship in which one organism benefits while the other is not affected
community
all the different populations that live within a habitat
consumer
an organism that obtains nutrients by eating other organisms
dormancy
a state in which an organism is inactive while it awaits more favorable conditions in its environment
ecological succession
the natural process by which one community of living things is replaced by another community in an orderly, predictable sequence, until a stable climax community appears
ecosystem
the living members of a community, plus the nonliving elements of their environment
endangered species
a species that is in danger of extinction
extinct
species that no longer exist
food chain
a sequence of organisms through which nutrients are passed along in an ecosystem
food web
a number of interconnected food chains
fossil
the remains or traces of an ancient organism
habitat
the particular environment in which an organism lives
herbivore
a plant-eating animal
hibernation
a sleeplike state of reduced body activity that some animals enter to survive the winter
migration
moving from one environment to another where conditions are more favorable
mutualism
a symbiotic relationship in which both organisms benefit
omnivore
a consumer that can eat both plants and other animals
parasitism
a symbiotic relationship in which one organism benefits while the other is harmed
physical adaptation
a physical characteristic that enables an organism to survive under a given set of conditions
population
all the members of a particular species that live within a habitat
producer
an organism that makes its own food; most producers are green plants
response
the reaction of a living thing to a change in its environment
stimulus
a change in the environment that causes an organism to react in some way
symbiosis
a relationship in which two or more different organisms live in close association with one another; that is, when one organism lives on or inside another one
Major Concept
Living things and the nonliving things in their surroundings make up an ecosystem. Adaptations allow an organism to survive in a particular ecosystem.
Major Concept
Green plants use sunlight to make their own food. They are called producers. Animals depend on other organisms for food. They are called consumers. All organisms get their energy directly or indirectly from the sun.
Major Concept
Decomposers are organisms that break down the remains of dead plants and animals. Decomposers return nutrients to the environment.
Major Concept
Producers, consumers and decomposers may be linked in a food chain. Disturbing any part of a food chain affects other organisms the food chain.
Major Concept
There is a constant exchange of materials between an organism and its environment; these materials include food, water, oxygen and wastes.
Major Concept
Ecological succession is the natural process by which one community is replaced by another community in an orderly, predictable way.