Chapter 1: Our Island, Errth

2. a well-tested explanation of observations and experimental findings
5. study of how the natural world works, how our environment affects us, and how we affect our environment
7. a resource that is formed much more slowly than it is used
8. able to meet the current demand for a resource without depleting the future supply
10. the variable that changes in response to the conditions set in an experiment
12. the branch of philosophy that involves the study of good and band, and of right and wrong
13. the environmental impact of an individual or population in terms of the total amount of land and water required
15. a carbon-containing fuel formed over millions of years from the remains of living things
16. a study in which only one factor is manipulated or changed
17. a social movement dedicate to protecting the natural world and people from undesirable changes brought about by human actions

1. a statement of what a scientist expects to observe if a hypothesis is true
3. a testable idea that attempts to explain a phenomenon or answer a scientific question
4. the variable that is manipulated or changed in an experiment
6. a resource that is replenished, or renewed over short periods of time
9. all living and nonliving things with which organisms interact
10. information collected using scientific methods
11. any natural materials and energy sources provide by nature that humans need to survive
13. the application of ethical standards to relationships between humans and their environment
14. the formal process of submitting research for examination by the scientific community