Across
- 3. Upper limit an ecosystem can sustain
- 5. A diagram of what eats what
- 7. Factors that limit a population's size
- 9. Water high in nutrients
- 10. Area defined by biotic and abiotic features
- 11. An organism that ovtains its energy by consuming other organisms
- 13. Nitrogen is absorbed by organisms who return it when they die
- 16. Water low in nutrients
- 17. Factors that may favor or not a species or population
- 18. Total mass of individuals in a population
Down
- 1. Water evaporates, then returns to earth
- 2. Ecological pyramids display the relationship of energy between trophic levels
- 4. How high an organism is on a food chain
- 6. Area where water drains to a single body
- 8. The role of an organism in an ecosystem
- 12. CO2 in water/atmosphere is turned into oxygen by plants
- 14. The cycle of resources required for life
- 15. Multiple linked food chains