Across
- 3. Things that humans do.
- 5. A nonliving thing that affects the ecosystem.
- 7. Resources that exist in the environment without human intervention.
- 11. A natural, nonrenewable fuel such as coal, oil, or natural gas formed a very long time ago from the remains of living organisms.
- 12. On or of Earth
- 14. A self-contained living thing.
- 15. Proper disposal of used resources so they can be reproduced into new products.
- 17. A living thing that affects the ecosystem.
- 20. The sum of all living matter on Earth.
- 22. All the living and nonliving factors in an area.
- 24. The use of resources (e.g., fuels of food) by specific populations.
- 25. Continual rise in the average temperature of Earth’s climate system.
Down
- 1. an animal that eats other animals.
- 2. The layer of gas surrounding a plant that is held in place by gravity.
- 4. A group of interacting individuals of the same species located in the same area.
- 6. The Interaction between two animals in which one animal eats the other.
- 8. A group of organisms with similar characteristics that are able to interbreed or exchange genetic material.
- 9. A source of supply that benefits organisms.
- 10. Web Overlapping food chains with different pathways to show the flow of energy in an ecosystem.
- 13. A system comprising of biotic and abiotic factors in an area and all the interactions among them.
- 16. The number of different species of plants and animals in an area.
- 18. When more than one individual or population in an ecosystem relies on the same limited resources.
- 19. Long-term change in the prevailing weather patterns.
- 21. An organism that must consume other organisms for nutrients.
- 23. The permanent disappearance of a species from Earth.