Across
- 2. not involving, containing, or derived from living organisms
- 4. the gradual and orderly process of change in an ecosystem
- 6. be a contributing element
- 9. organism capable of synthesizing its own food
- 11. organisms interacting with their physical environment
- 12. the use of methods that do not harm the environment
- 16. mutual or reciprocal dealings or influence
- 17. watch attentively
- 19. an organism that breaks down dead animal and plant matter
Down
- 1. the physical world including plants and animals
- 3. look into scientifically
- 5. break down into components or essential features
- 7. an organism that feeds on plants and/or animals
- 8. the type of environment in which an organism normally lives
- 10. group of interdependent organisms living in the same region
- 13. a strong influence
- 14. that which has mass and occupies space
- 15. a living organism characterized by voluntary movement
- 18. of or relating to living organisms