Vocabulary List 7 Question Preview (ID: 28186)


Ecosystem Change Part 1 (17 Words). TEACHERS: click here for quick copy question ID numbers.

The variety or differences among living organisms within an ecosystem. The more diverse an ecosystem is the more stable it is.
a) biodiversity
b) limiting factors
c)
d)

The place where an organism lives and that provides the things the organism needs.
a) habitat
b) population
c)
d)

A group of organisms that are physically similar and can reproduce with each other to produce fertile offspring.
a) species
b) community
c)
d)

A single individual animal, plant, or single celled life form. The smallest unit of organization.
a) organism
b) population
c)
d)

All the members of one species in a particular ecosystem.
a) population
b) community
c)
d)

All the different populations that live together in an ecosystem.
a) community
b) population
c)
d)

Count every organism one at a time. This is the only exact way to find population size, but also the most difficult.
a) direct observation
b) indirect observation
c)
d)

Observing tracks of animals or signs that animals are in the ecosystem, but never actually seeing them. Not an exact way to determine population size.
a) indirect observation
b) direct observation
c)
d)

Counting the number of organisms in a small area and then multiplying that number by the entire area of the ecosystem. This is a form of estimating population size.
a) sampling
b) mark and recapture
c)
d)

A group of animals is captured, marked, and released back into the ecosystem. Then on another day animals are captured and the number of those that have marks help determine population size.
a) mark and recapture
b) sampling
c)
d)

The number of individuals in a specific area. # of individuals divided by the area of the ecosystem.
a) population density
b) carrying capacity
c)
d)

The maximum number of individuals of a population that a particular environment can support over a period of time.
a) carrying capacity
b) population density
c)
d)

The ratio of births to the number of organisms in a population over a given time period.
a) birth rate
b) death rate
c)
d)

The ratio of deaths to the number of organisms in a population over a given time period.
a) death rate
b) birth rate
c)
d)

The movement of individuals into a population or ecosystem.
a) immigration
b) emigration
c)
d)

The movement of individuals out (exit) of a population or ecosystem.
a) emigration
b) immigration
c)
d)

Factors that can limit the growth of a population. Food, water, space, shelter and weather are good examples.
a) limiting factors
b) biodiversity
c)
d)

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