1. environment all living things and the nonliving things with which they
interact
2. environmental The study of the natural processes that occur in the envi-
science ronment and how humans can affect them.
3. renewable re- Natural resources that can be replaced.
sources
4. nonrenewable re- resources such as fossil fuels, which can not be made
sources again.
5. Agricultural Rev- The time when human beings first domesticated plants
olution and animals and no longer relied entirely on hunting and
gathering
6. industrial revolu- A period of rapid growth in the use of machines in manu-
tion facturing and production that began in the mid-1700s
7. ecological foot- the impact of a person or community on the environment,
print expressed as the amount of land required to sustain their
use of natural resources.
8. tragedy of the the tendency of a shared, limited resource to become de-
commons pleted because people act from self-interest for short-term
gain
9. science An organized way of gathering and analyzing evidence
about the natural world.
10. scientific method A series of steps followed to solve problems including
collecting data, formulating a hypothesis, testing the hy-
pothesis, and stating conclusions.
11. hypothesis A testable prediction, often implied by a theory
12. controlled exper- An experiment in which only one variable is manipulated
iment at a time.
13. qualitative data descriptive data
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