Across
- 5. community of living organisms
- 7. all living and non-living things in the natural world
- 9. last name of a former US president that supported conservation
- 10. what humans breathe
Down
- 1. study of past human interactions
- 2. visible features of an area
- 3. first component of a food chain
- 4. name of the most famous national park in the US
- 6. study of humans, plants and animals
- 8. last name of the author that wrote about transcendentalism and romanticism