Chapter 1

5. naturally formed much more slowly than we use them
7. a variable scientists manipulate
11. a social movement dedicated to protecting the natural world
13. a variable that depends on the conditions set up in the experiment
14. broader explanations that apply to a wider range of situations and observations
15. a branch of philosophy that involves the study of behavior: good, bad, right, and wrong
16. the application of ethical standards to relationships between humans and their environment
17. all variables are controlled except one
18. all living and nonliving things
19. renewed over short periods

1. using a resource at the same rate or slowly than it is renewed
2. a testable idea that attempts to explain a phenomenon or answer a scientific question
3. expresses the environmental effects of an individual or population
4. nonrenewable energy resources such as oil, coal, and natural gas
6. made by nature at various speeds
8. several other scientists specializing in the topic of the paper examine it
9. information from scientists' studies
10. the study of how the natural world works, how we affect our environment, and how our environment affects us
12. specific statements about what we would expect to observe if the hypotheses are true