Across
- 3. process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
- 4. the study of the relationships between living organisms, including humans, and their physical environment
- 5. the chemical processes by which atmospheric nitrogen is assimilated into organic compounds
- 8. the portion of Earth that supports life
- 10. a model representing the many interconnected food chains and pathyways in which energy flows through a group of organisms
- 14. an organism which eat fragments of dead matter in an ecosystem and returns nutrients to the environment
- 16. process in which fixed nitrogen compounds are converted back into nitrogen gas and returned to the atmosphere
- 17. shows the continuous movement of water within the Earth and atmosphere
- 20. the act of one organism consuming an other organism for food
- 21. a relationship between two or more organisms that live closely together and benefit from each other
- 23. The change of state from a gas to a liquid
- 26. a group of interacting populations that occupy the same geographic area at the same time
- 27. the nonliving factors in an organism's environment
- 28. any substance that has mass and takes up space by having volume
- 30. substance used by an organism to survive, grow, and reproduce.
- 32. Any form of water that falls from clouds and reaches Earth's surface.
- 34. the living factors in an organism's environment
- 35. the close relationship that forms when two or more species live together
Down
- 1. a relationship where one organism benefits at the expense of another
- 2. an organism that gets its energy requirements from consuming other organisms
- 6. a heterotroph that only eats plants
- 7. individual organisms of a single species that share the same geographic location at the same time
- 9. A carnivore that feeds on the bodies of dead organisms
- 11. a heterotroph that eats both plants and animals
- 12. a biological commuunity and all of the biotic and abiotic factors that affect it
- 13. a role or position that an organism has in its environment
- 15. The change of a substance from a liquid to a gas
- 18. a relationship where one organism benefits and the other is neither hurt nor helped
- 19. where an organism lives
- 22. step in a food chain or web
- 24. the total mass of living matter at a trophic level
- 25. a simple model that shows how energy flows through an ecosystem
- 29. an organism that collects energy from sunlight or inorganic substances to produce food
- 31. a large group of ecosystems that share the same climate and have similar types of communities
- 33. a heterotroph that preys on other heterotrophs