a set of componetnts that interact and funtion as a whole
a condition in which people cannot meet their basic needs for adquate food, clothing, shelter, education, or health
highly developed countries
countires with complex industrial bases, low rates of population growth, and high per capita incomes
moderately developed countries
devleoping countries with a medium level of industrialization and average per capita incomes that are lower than thos of highly devloped countries
natural resources that are present in limited supplies and are depleted by use; including minerals such as copper and tin and fossil fules such as oil and natural gas
resources that are replaced by natural processes and can be used forever, provided they are not overexploited in the short term. Examples include fresh water in lakes and rivers, fertile soil, and trees in forestes.
the human use of material and energy: generally speaking people in highly developed countires are extravagant conumers and their use of resources is greatly out of proportion to their numbers
a situation in which there are more people in a given geographic area than that area can support
a situation that occurs when each individual in a population consumes too large a share of resources
the amount of land and ocean needed to supply an indvidual with food, energy, water, housing, transportation, and waste disposal
a representation of a system; descries the system as it exists and predicts how changes in one part of the system will affact the rest of the system
the ability to meet the current human need for natural resources without compromising the ability of future generations to meet their needs
tragedy of the commons
depletion or degradation of a potentially renewable resource to which people have free and unmanaged access. an example is the depletion of commercially desirable fish species in the open ocean beyond areas controlled by coastal countries
those parts of our envirnment avaliable to everyone but for which no single individual has responsibility - the atmosphere and climate, fresh water, forests, wildlife, and the ocean
shared responsibility for the sustainable care of our planet
Development that meets the needs of the present without compromising the ability of future generations to meet their own needs.
the interdisciplinary study of humanity's relationship with other organisms and the nonliving physical environment
scientific study of interactions among organisms and between organisms and their environment
the condition in which the rate of change in one direction is the same as the rate of change in the opposite direction
System in which outputs from the system affect future inputs or future activities of the system.
negative feedback system
a system in which a change in some condition triggers a response that counteracts, or reverses, the changed condition.
positive feedback system
a system in which a change in some condition triggers a response that intensifies the changing condition.
a collection of facts from which conclusions may be drawn
the way a scientist approaches a problem by formulating a hypothesis and then testing it by means of experiment
A factor that can change in an experiment
A subject or group of subjects in an experiment that is exposed to the factor or condition being tested.
the group that does not receive the experimental treatment.
an integrated explanation of numerous hypotheses, each of which is supported by a large body of observations and experiments
Reasoning that uses specific example of draw a general conclusion or discover a general principle.
reasoning that operates from generalities to specifics and can make a relationship among data more apparent.
a system formed by the interaction of a community of organisms with their physical environment