Across
- 4. only eats meat for food
- 6. benefits one does not hurt the other
- 7. gains nutrients from dead organisms
- 8. the number of species in a given area
- 11. a group of two or more population
- 12. something you notice
- 13. benefits both organisms
- 15. only eats plants for food
- 18. liquid falling from the sky
- 20. the gases surrounding the earth
- 21. benefits one hurts the other
- 22. the study of relationships between organisms
- 23. a relationship between two living creatures
- 24. an educated guess
Down
- 1. liquid turning into gas
- 2. the largest group of that can reproduce
- 3. consumes others for food
- 5. the coming together of liquid
- 9. makes its own food
- 10. the physical region of the atmosphere
- 12. eats both meat and plants
- 14. information
- 16. the variety of life in a certain location
- 17. hunter
- 19. hunted