Natural Resources/Natural Cycles Quiz
Across
- 4. Resources that can be replaced in a reasonable time
- 7. The loss of an entire species
- 8. the continuous movement of water from the atmosphere to the Earth's surface and back
- 11. To process used products into new products
- 13. process that animals use to break down food to get energy
- 14. The growth of _____________ causes more resources to be used
- 15. The careful use of resources so that they last as long as possible
- 16. A species with so few individuals that they could die out
- 17. gas in the air that has to be fixed into useable forms
Down
- 1. materials found in nature that are essential or useful to people
- 2. organisms that release carbon dioxide into the air
- 3. Bacteria found in the roots of these plants fix nitrogen into useable forms
- 5. Resources that cannot be replaced in a human lifetime
- 6. To use products again
- 9. The gradual long term change of species in an ecosystem
- 10. organisms that take in carbon dioxide
- 12. the process by which plants make their own food