Across
- 3. an inborn impulse or motivation to action
- 5. animal that naturally preys on others
- 7. causes a noticeable change in output or another measure of a type of system
- 8. pond, coral reef,savannah,jungle
- 10. an organism that creates its own food
- 12. natural interconnection of food chains
- 15. a nonnative species that is hindering a ecosystem
- 16. an organism that consumes other organisms for energy
- 17. an animal that is hunted
- 18. energy found within the trophic levels
- 19. a species which other animals largely depend upon
- 20. becoming used to something
Down
- 1. organisms each dependent on the next as a source of food
- 2. organisms that break down dead or decaying organisms
- 4. the maximum population of a species that an ecosystem can support
- 6. variation of life forms present in different ecosystems
- 9. position of an organism in the food chain
- 11. a place or location where an organism lives
- 13. range of different inherited traits
- 14. the mass of living organisms