1											2			3									4
										5														6
	7
																						8
							9
														10											11
					12
			13
	14
									15
														16
			17									18
									19
			20																				21			22		23
																				24
25
26							27									28
						29
30																31
	32

Across 2. illustrates one possibility for the shift of energy between organisms 6. the area an organism lives in 7. the gradual development of a community over time 8. too much waste in an environment to be successfully eliminated 10. maximum population size an environment can support long-term 13. when a new environment develops into a habitable place for the first time 15. each step in a food chain or food web 18. factor that restricts the number, distribution, or reproduction of a population 20. symbiotic relationship where both species benefit 24. breaks down organic matter into simpler compounds 25. a limiting factor that has different effects depending on the density of a population 26. process by which toxic material get more concentrated as they move up the food chain 29. autotrophs 30. the act of a predator eating prey 31. made up of the living and nonliving components of the environment 32. organisms that get their energy by eating other organisms

Down 1. branch of biology that studies how organisms interact with each other and the environment 3. a limiting factor that affects all populations the same regardless of size 4. non-living factors in an environment 5. the greenhouse effect going overboard 9. symbiotic relationship where one species benefits and other is harmed 11. all the organisms of a single species in the same place 12. how many types of organisms live in an environment 14. a species outside of the place it originally evolved 16. an animal that consumes both other animals and plants 17. symbiotic relationship where one species benefits and other is unaffected 19. the role an organism has in it's community 21. an energy source that cannot be replaced within a human life time 22. all organisms of all species living in the same area 23. animal that eats plants 27. an animal that only eats other animals 28. illustrates many possibilities for where the energy of an organism can go