7th Grade Science Challenge

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Across
  1. 5. disaster that occurs in dry, windy environments; often caused by lightning
  2. 6. first “P” in HIPPO
  3. 8. two or more elements bonded together chemically
  4. 9. anything from Earth which humans use
  5. 13. thinnest layer of the earth
  6. 14. cycle of matter that includes respiration, photosynthesis, and pollution
  7. 15. two or more elements or compounds NOT chemically combined
  8. 19. center of earth
  9. 20. part of the mantle where convection currents occur
  10. 21. thickest layer of earth; location of convection currents
  11. 23. natural resources that are gone once they are used
  12. 24. boundary where plates move together
  13. 26. positive particles in the nucleus of an atom
  14. 28. rock made from heat and pressure
  15. 31. snow sliding and building up causing disaster
  16. 33. the biggest cause of extinction
  17. 34. caused by too many greenhouse gases building up in the atmosphere
  18. 36. negative particles that travel around the nucleus of an atom
  19. 38. process that moves small rock pieces
  20. 39. theory presented by Alfred Wegener
  21. 41. twisting disaster
  22. 42. name of the super continent
  23. 44. process of removing minerals from Earth
  24. 47. process in which magma rises and cools at divergent oceanic plates
  25. 52. boundary where plates slide side by side
  26. 53. warmer than usual water in the Pacific ocean
  27. 54. layer of earth that is liquid
  28. 57. rock made from compaction and cementation
  29. 59. way in which an organism is able to be hurt or damaged
  30. 63. heat transfer through direct contact
  31. 64. process that breaks rock into smaller pieces
  32. 69. process at convergent boundaries where dense crust goes under and melts into magma
  33. 70. mixture that is the same throughout
  34. 71. cycle of matter that includes bacteria, lightning, and dead organisms
  35. 72. average weather trends for a particular area
Down
  1. 1. a homogeneous mixture
  2. 2. all of the possible paths that energy can travel in an ecosystem
  3. 3. found on the Periodic Table
  4. 4. one possible path that energy can travel in an ecosystem
  5. 7. increased development of land allows for more runoff and an increase of this natural disaster
  6. 9. floods, avalanches, volcanoes, earthquakes, tornadoes
  7. 10. the puzzle pieces of the lithosphere
  8. 11. causes the climate on either side of a mountain to differ
  9. 12. the sugar in lemonade (substance that gets dissolved)
  10. 16. energy waves that travel through the atmosphere through space
  11. 17. layer of Earth that includes the crust and the top of the mantle
  12. 18. the water in lemonade (substance that dissolves another substance)
  13. 22. igneous rocks formed above ground
  14. 25. Chesapeake Bay is the largest of these areas where fresh and salt water meet
  15. 27. layers of gases surrounding Earth
  16. 29. heat transfer by waves
  17. 30. 7 billion humans on Earth
  18. 32. species which are introduced into a new environment and often overtake the native species
  19. 33. typhoons, but in the Northern Hemisphere of Earth
  20. 35. neutral particles in the nucleus of an atom
  21. 37. acronym used to describe reasons for which species become endangered
  22. 40. surround the Ring of Fire
  23. 43. occur at faults
  24. 45. mixture in which you can see the different parts
  25. 46. current conditions in the atmosphere
  26. 48. nonrenewable natural resource made underground from dead organisms
  27. 49. fishing too much, for example
  28. 50. natural resources that can be replaced by nature faster than we use them
  29. 51. elements organized here in groups and periods
  30. 55. feature found at divergent continental plates
  31. 56. heat transfer in fluids; hot fluids rise and cool fluids sink
  32. 58. made up of pebbles and minerals
  33. 60. smallest part of matter
  34. 61. igneous rocks formed underground
  35. 62. layer of the atmosphere in which weather occurs
  36. 65. large wave caused by underwater earthquakes
  37. 66. species which can no longer be found alive on Earth
  38. 67. rock made from melting and cooling
  39. 68. boundary where plates divide