Across
- 1. The amount of organisms in an area
- 5. A substance that provides nourishment
- 8. carnivore at the top of the food chain
- 9. A sugar that is an energy source in living organisms
- 10. The ability to do work
- 12. A thing that consumes something
- 13. An organism that produces its own food
- 16. Decayed organic material
- 18. A process that plants use to turn sunlight into food
- 19. A system of interlocking food chains
- 20. Light energy
- 21. A model of energy that shows how energy flows in an ecosystem
Down
- 2. A chemical compound that contains at least one atom of carbon
- 3. Herbivore
- 4. Energy stored in chemical compounds
- 6. Organism that feeds on dead organisms
- 7. carnivore or omnivore at the middle of a food chain
- 11. An organism that decomposes organic material
- 14. A substance that possesses mass
- 15. The process of rotting
- 17. A series of organisms each dependent on each other as a source of energy
- 22. Rotting through the action of bacteria and fungi