Across
- 3. Multiple food chains linked together
- 9. The build up of toxic or harmful substances within a food chain
- 10. The number of organisms in the same species within a habitat
- 12. When a species no longer exists
- 13. The variety of living organisms
- 14. The chemical reaction that turns carbon dioxide and water into glucose and oxygen using light.
- 16. The predator at the top of the food chain
- 18. What do the arrows in a food chain represent?
- 19. The chemical reaction that requires glucose to release energy
Down
- 1. The struggle between different organisms for resources
- 2. The place where an organism lives
- 4. Organisms that break down dead plants and animals
- 5. An organisms role in an ecosystem
- 6. Organisms form different species within the same habitat
- 7. All of the living and non-living things in an area
- 8. An organism that makes its own food through photosynthesis
- 11. An organism that eats other animals
- 15. An animal that only eats plants
- 17. An animal that is predated upon