Across
- 4. Natural resources that can last forever regardless of human activity.
- 5. Natural resources that cannot be replaced or reproduced.
- 7. study of interactions of organisms with one another and with physical and chemical environments.
- 8. Choosing not to use our natural resources.
- 10. Natural resources that can naturally renew themselves.
- 11. Animals, including humans, give off ___________________ that the plants need to live.
Down
- 1. Those things with which we come in contact that can be used to perform any useful function.
- 2. The idea that all natural resources depend on each other is known as natural resource dependence.
- 3. The wise use of our natural resources.
- 6. The ______________ process releases minerals back into the soil.
- 9. Humans need animals for food, clothing, and work.