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Across 6. the earth is covered by these major bodies of water 7. where an organism may live 12. the average weather in an area over a long period of time 14. study of how living things interact with each other 15. area of land covered by water for a part of the year 17. changed factor in an experiment 18. waste disposal facility where wastes are put in the ground 19. the 1st organisms to colonize any newly available area 23. the study of DNA 24. constant factor used in an experiment 27. large storm that can created major erosion 28. organism that is killed and eaten by a predator 29. permanently frozen biome 34. biome dominated by conifers 35. the number of individuals in one species in a given area 37. the wearing away of topsoil, loss of beaches 39. eats only animals 40. Darwin theory 41. the supercontinent before plates started to drift 43. ph of 4 and may precipate as rain 44. something that physically eats another species 47. often happens between members of one species 50. word meaning a large city 51. the precipation that brings water to earth 53. living factors 55. warming effect caused by heat rising and being trapped 56. composed of fungus and algae

Down 1. organisms from which a parasite takes its nourishment 2. widespread food shortage 3. word meaning a desolate country area 4. the way of life of an organism 5. regions with distinct climates and organisms 8. non living factors 9. air pollution over urban areas, smoke and fog 10. these animals can eat much larger organisms than itself 11. eats plants and animals 13. feeds on the dead 16. a severe shortage of water 20. a group of organisms that can breed to produce offspring 21. form of oxygen with molecules made of 3 oxygen atoms, (O3) 22. the producer grows, the consumer eats it, another consumer eats that 23. predicted increase in earth's temperature 25. observed or gathered info from which conclusions can be made 26. breaks down matter for recycling 27. an educated guess 28. CO2 + H20 + Sunlight= C6-H12-06 + Water 30. the tropical rain forest has this 31. a change that can help an organisms is referred to as this 32. the maximum number for a population in a given area 33. the "juice" for life 36. process of supplying water to an area by artificial means 38. organism that makes its own food 39. a group of interacting species 42. organism kills and eats another organism 45. when a species dies out 46. reusing discarded material 48. amino acids make this molecule 49. the impressions left after an animal dies 52. not a food chain but a food....? 54. rock that contains minerals