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Across 1. The changing of agas into a liquid 6. a lens that is thicker at the edges than at the middle. As it curves inward, it spreads light rays apaprt, making images appear smaller 8. A living part of an ecosystem 9. the pull or attraction between objects 10. any of a group of gymnosperms that produces seeds in cones and have needles for leaves 12. a force that opposes the motion of one object moving past another 14. a lens that is thicker at the middle than at the edges. it makes images appear larger 18. a scientist who studies rocks 20. Atoms linking together in a new way to create a new substance; ex. rusted metal 21. One celled living things that have no nucleus; causes infections 23. the immature plant inside a seed 24. the role an organism plays in its community 26. Animal that eats another animal 27. the food making process fro plants 28. Substance that tastes sour and turns blue litmus paper red 30. stored energy 31. Green chemical in plant cells for making food 33. the passing of heat through a material 34. a resource that can't be replaced 36. an organism produced by the crossing of parents that have different forms of the same trait 37. a relationsjip in which one organism lives in or on another organism and benefits, while the other animal is harmed 38. A rock formed when melted rock material cools and hardens 39. a puffy cloud that appears to rise up from a flat bottom 40. An animal with no backbone 41. A fuel formed from the decay of ancient forms of life 43. A particle in the space outside the nucleus and has a negative charge 47. A characteristic that enables a living thing to survive in its environment 49. The smallest unit of an element that retains the properties of that element 50. A seed plant that produces flowers 51. Mildew, mold, and mushrooms can be found in this kingdom 52. a layer of permanently frozen soil found in the arctic 53. a measure of how tightly packed the matter in an object is 54. To prevent heat or cold from passing through; ex. coat 55. a structure containing egg cells; the base of a pistil in a flower 56. All the living and nonliving things in an environmnet, including their interactions 57. a plant that loses its leaves each fall

Down 2. A nonliving part of an ecosystem 3. An animal that eats plants 4. The energy of any moving object 5. Hot, molten rock deep below Earth's surface 7. to place things that share properties together in groups 11. an animal that eats both plants and animals 13. A mixture where different particles can be seen 15. a particle in the nucleus of an atom and has no charge 16. A rock formed from heat and pressure from another rock 17. magma that reaches Earth's surface 19. The slow changing of a liquid into a gas 21. Upward push of a liquid on an object placed in it; ex. wood in water 22. An adaptation where an animal is protected from predators due to its resemblance to another unpleasant animal 25. relationship between two kinds of organisms benefits one without harming the other. 29. where cold air moves in under a warm air mass 31. A high altitude cloud with a feather like shape made of ice crystals 32. The state at which a substance changes from a liquid to a gas 35. Contains chlorophyll 37. the transfer of a pollen grain to the egg-producing part of a plant 42. the path of a planet traveling around a star 44. The average pattern of a region 45. A seed plant that does not produce flowers 46. An adaptation that an animal uses to protect itself by blending in with the environment 48. the tendency of a moving object to stay in motion