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Across 4. the skaking of earths crust caused by a release of energy 6. the horizontal rows on the periodic table are organized into these 8. the point on the fault plane at which the first earthquake movment occurs 9. the subatomic particle that is actively involved in bonding 13. the top of a wave 16. the tendancy of a surface to be a good or poor reflector of light 18. the point on the earths surface directly above the focus 20. elements that are manufactured in the laboratory are called 21. another name for an igneous intrusion 22. the first person to successfully use a telescope 24. a chemical reaction that absorbs energy 26. a ___ is what an era in geologic time is divided into 30. a large grouping of billions of stars clustered together 32. the place where over 50% of earth's volcanoes are locates 33. the bottom of the wave 34. the smallest unit of geologic time 37. the distance from the top of one wave to the top of the next wave 42. ___ boundaries are moving away from each other 44. NaCl is an example of this type of bond 46. pieces of lithosphere that move around on top of the asthenosphere 47. the sudden brightening of a white dwarf 49. ___ boundaries are moving towards each other 51. a metal that can be hammered out or rolled into thin sheets 52. the law of ___ states that the oldest rocks are on the bottom and the youngest rocks are at the top 53. the supercontinent that means "all earth" 54. this person is credited for developing the first periodic table 55. s-waves can only travel through this

Down 1. the bending of a wave as it passes from one medium to another 2. a single back and forth motion of a wave 3. a crack in the earth's crust 5. all of earths weather occurs in this layer of the atmosphere 7. a metal that can be pulled through a wire is 10. the crust and upper mantle make up this 11. when the angle of reflection = the angle of incidence it is called the law of ____ 12. this group of elements occupies the upper right corner of the periodic table 14. the milky way is this type of galaxy 15. any evidence of earlier life 17. the study of the universe 19. how long does it take the earth to make one complete rotation on its axis 23. HCl is an example of this type of bond 25. the bending of a wave as it passes around an obstacle 27. the average weather over a long period of time 28. the size of the waves disturbance 29. the number of seismograph stations needed to determine the epicenter of an earthquake 31. the distance light travels in one year 34. a chemical reaction that releases energy 35. the theory that suggests all matter that exists today was concentrated in a small object then exploded 36. ___ rays have the highest frequency on the EMS 38. the exact age of a fossil 39. an element with properties of both metals and nonmentals 40. an attractive force that holds atoms together 41. the end result in a chemical reaction 43. an opening in the earth's crust through which an eruption takes place 45. the substance that participates in the chemical reaction 48. the time it takes for earth to make one revolution around the sun 50. the vertical columns on the periodic table are organized into these