Across
- 3. A large area covered mainly with trees.
- 6. Protection and careful management of natural resources.
- 7. To convert waste materials into new products.
- 8. The physical world, including plants, animals, and landscapes.
- 9. Study of how living things interact with their environment.
- 10. A community of organisms interacting with each other and their environment.
Down
- 1. The planet we live on.
- 2. The variety of living organisms in an ecosystem.
- 4. Contamination of the environment by harmful substances.
- 5. The natural home of a plant or animal.
- 10. The power needed to do work or produce heat.