Across
- 2. a material or energy source provided by nature that people need to survive
- 7. the study of how people decide to use potentially scarce resources to provide goods and services that are in demand
- 8. a large section of lithosphere that moves across the Earth's surface
- 11. a factor determined by the conditions set up in an experiment
- 15. increased output from a system results in increased input, leading to further increased output, and so on leading the system further toward an extreme
- 16. the process created to artificially fix nitrogen or to pull it out of the air into a form we can use for agriculture
Down
- 1. living within our planet’s means such that Earth and its resources can sustain us–and all life–for the future
- 3. an organic compound that contains only hydrogen and carbon
- 4. a factor scientists manipulate in an experiment
- 5. soil removed by water, wind, ice, or gravity
- 6. states that matter can be transformed but cannot be created or destroyed
- 9. all living and nonliving things with which organisms interact
- 10. a system where input and output essentially neutralize one another’s effects, stabilizing the system
- 12. the set of moral principles or values held by a person or a society
- 13. the environmental effects of an individual or group in terms of resources used and waste produced
- 14. an economic and environmental theory that describes a situation where people overconsume a shared resource at the expense of others