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Across 4. Survive in 10 times salt concentration as ocean 6. Moves electrons 9. Hyperthermophiles die in these temperatures 12. On top of Core, made of silicate rock that can flow 13. Two types that are Rock and Iron and Rock and Ice (and other volatiles) 14. Earliest life was this 15. Radiometric dating gives 4.4 billion years to these (2 Words) 18. Endoliths reproduce ___ per century 19. 700-1000 million years ago this happened (2 Words) 22. Organisms living at the highest temperatures, thrive at 121 C 23. Organisms that survive in extreme conditions, only organisms that could survive Earth's beginings 26. Composed of individual mineral grains packed together leaving small spaces between the grains 28. =energy input per kg of cells 30. Both types of planetesimals smash together, heat up, melt and then ______ to form the Earth. More Dense materials sink:less dense material floats 33. Prokaryotes tend to be ______ tolerant 34. The crust of the Earth is broken up into huge segments called lithospheric plates (2 Words) 35. A bacterial species that can survive high doses of radiation, fully repair in 24 hours (2 Words) 37. =Rotation+free electrons+convection (2 Words) 38. Organisms that survive in extremely cold conditions 39. Live several kilometers below the surface of Earth in the water in the pores of rock 42. Gas molecules formed solid grains by this 45. These come from frost belt 48. Center of Earth made of iron. Half Eart radius 50. Rock that has been formed under high pressure or heat 51. Rock made from molten rock that cools and solidifies 53. Time for half of the atoms to decay (2 Words) 55. Allow organisms to create a barrier that allows them to go dormant under extreme conditions, even vacuums of space 56. HDO, with the D= 57. Hail from the outer solar system and have lots of water as ice 58. Stirred up the asteroid belt

Down 1. =1 inch per year (3 Words) 2. Nuggets of material that melted and cooled quickly 3. DNA life may have arisen from an earlier _____ world 5. Gradual rearranging of continents (2 Words) 7. The more radioactive the ______ the half life 8. Occurred during first billion years of solar system (3 Words) 10. Life from non-living matter 11. Thrive in toxic waste dumps 15. Simulate a energized water pool with early atmosphere gases that combined methane, ammonia, hydrogen and mixed in water (3 Words) 16. In the 2010 Miller Urey experiment 23 amino acids were produced with it being the first appearance of these containing amino acids 17. If a nucleus has too many or too few neutrons it is unstable to this (2 Words) 20. How Thermophiles survive, unique not warped shape 21. This became our Sun, the planets, the asteroids, the comets, the entire solar system. Collapsing rotating interstellar cloud (2 Words) 22. Oldest Eon on Earth 24. Volcanoes, mountain building, earthquakes, folding, faults are the result of this (2 Words) 25. Strip atmosphere with charged particles (2 Words) 27. Gradual compression of sediments creates this rock 29. Radiation renders this 31. Oldest rocks known 32. Organisms that survive in extremely hot water. Hot springs, deep sea vents 36. Layered rocks, colonies of microbes 40. Earth seeded by life from elsewhere in the universe 41. Formed the first oceans and atmosphere 43. How the Earth is protected from UV Radiation (2 Words) 44. Extremeophiles live without oxygen, making them this 46. On top of mantle, where we live 47. Distance = 3 AU (2 Words) 49. Type of Rock Produced by undersea volcanoes 52. The study of Earth 54. _____ current will produce a magnetic field