biotic and abiotic surroundings to which an organism must constantly adjust; includes air, water, weather, temperature, other organisms, and many other factors
the study of how humans interact with the environment
a collection of structures, cycles, and processes that relate to and interact with each other
All the organisms in a given area as well as the abiotic factors with which they interact; a community and its physical environment.
the living organisms in an ecosystem
nonliving, physical features of the environment, including air, water, sunlight, soil, temperature, and climate
person who works to reduce pollution and protect the natural environment
Study of the environment, including the social, political, and ethical aspects or dimensions
Natural services or natural capital that support life on the earth and are essential to the quality of human life and the functioning of the world's economies.
organisms or physical factors that serve as a gauge for environmental changes
the ability to meet humanities current needs without compromising the ability of future generations to meet their needs
the number of different species in an area
group of similar organisms that can breed and produce fertile offspring
formation of new species
background extinction rate
the average rate at which species go extinct over the long term
(Examples: H2O, CO2, O3, methane (CH4), CFC's) (EFFECT: they trap outgoing infrared (heat) energy causing earth to warm
human induced changes on the natural environment
the act of making more area of land or water more profitable or productive or useful
using natural resources at a rate that does not deplete them
sense of connection to nature and other forms of life
The amount of biologically productive land and water needed to support a person or population.
a method of investigation involving observation and theory to test scientific hypotheses
a tentative theory about the natural world (based on limited evidence)
The hypothesis that states there is no difference between two or more sets of data.
the repetition of an experiment in order to test the validity of its conclusion
The number of subjects used in an experiment or study. Generally, the larger the better.
the quality of nearness to the truth or the true value
how close a series of measurements are to one another
being unsettled or in doubt
reasoning from specific examples to general
reasoning from the general to the specific
the ability and willingness to assess claims critically and to make judgments on the basis of objective and supported reasons
well-tested explanation that unifies a broad range of observations, a tentative theory about the natural world (based on principles)
in an experiment, a group that serves as a standard of comparison with another group to which the control group is identical except for one factor
A natural event that acts as an experimental treatment in an ecosystem.
recognition that access to a clean, healthy environment is a fundamental right of all human beings