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Mrs. Babb Ch 20-21 test
Ecology
17
Science
7th Grade
09/23/2009

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Term
The place in which an organism lives
Definition
Habitat
Term
Organisms in an ecosystem that belong to one species are called
Definition
Population
Term
The study of interactions among organisms and their environment is known as
Definition
ecology
Term
all the organisms living in an area and the nonliving features of their environment is known as
Definition
ecosystem
Term
the largest number of individuals of one species that an environment can support and maintain is known as the
Definition
carrying capacity
Term
anything that restricts the number of indiviudals in a population is known as
Definition
limiting factor
Term
the part of earth that supports life is the
Definition
biosphere
Term
the size of a population that occupies a specific area is the
Definition
population density
Term
all the populations in an ecosstem is known as
Definition
community
Term
How can ecological succession begin
Definition
after a natural disaster/disturbance or man made disturbance
Term
What includes the top portion of Earth's crust, all the waters that cover Earth's surface, and the surrounding atmosphere?
Definition
Biosphere
Term
What occurs when two or more organisms seek the same resource at the same time
Definition
Competition
Term
Sunlight, water, temperature, and soil...is that biotic or abiotic?
Definition
abiotic
Term
All of the living factors in a given environment is known as...
Definition
biotic factors
Term
the growth of lichens follows the start of which kind of succession?
Definition
primary, because they make soil by breaking down the rock...they are the pioneer species
Term
all of the deer, mice, grass, trees, and raccoons in an area is known as
Definition
a community
Term
Drought, flood, amount of rainfall, erosion, heat, etc are biotic or abiotic?
Definition
Abiotic
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