Hardest SIO classes at UCSD

Ranked by average GPA from official grade distributions. Only courses with at least 100 graded students.

  1. SIO 16: Geology of the National Parks Average GPA 2.81, 636 students
  2. SIO 103: Introduction to Geophysics Average GPA 2.93, 208 students
  3. SIO 126: Marine Microbiology Average GPA 2.94, 385 students
  4. SIO 128: Microbial Life in Extreme Env. Average GPA 2.95, 745 students
  5. SIO 124: Marine Natural Products Average GPA 3.02, 238 students
  6. SIO 134: Intro/biological Oceanography Average GPA 3.04, 1,413 students
  7. SIO 132: Introduction to Marine Biology Average GPA 3.05, 1,504 students
  8. SIO 101: California Coast Oceanography Average GPA 3.07, 348 students
  9. SIO 20: The Atmosphere Average GPA 3.08, 798 students
  10. SIO 111: Introduction to Ocean Waves Average GPA 3.09, 138 students
  11. SIO 174: Chemistry of Atmosph and Ocean Average GPA 3.11, 147 students
  12. SIO 189: Pollution, Environmnt & Health Average GPA 3.13, 325 students
  13. SIO 127: Marine Molecular Ecology Average GPA 3.16, 210 students
  14. SIO 30: The Oceans Average GPA 3.23, 1,745 students
  15. SIO 119: Physics and Chem of the Oceans Average GPA 3.23, 897 students
  16. SIO 184: Marine Invertebrates Average GPA 3.23, 192 students
  17. SIO 138: The Coral Reef Environment Average GPA 3.24, 362 students
  18. SIO 172: Physics of the Atmosphere Average GPA 3.25, 208 students
  19. SIO 108: Intro to Paleoclimatology Average GPA 3.27, 135 students
  20. SIO 102: Introduction to Geochemistry Average GPA 3.28, 309 students
  21. SIO 16R: Geology of the National Parks Average GPA 3.28, 178 students
  22. SIO 1: The Planets Average GPA 3.29, 1,024 students
  23. SIO 171: Intro to Physical Oceanography Average GPA 3.29, 193 students
  24. SIO 104: Paleobiology & History of Life Average GPA 3.30, 153 students
  25. SIO 117: Physical Basis of Global Warmg Average GPA 3.31, 329 students
  26. SIO 25: Climate Change and Society Average GPA 3.33, 2,096 students
  27. SIO 100: Introduction to Field Methods Average GPA 3.34, 227 students
  28. SIO 160: Introduction to Tectonics Average GPA 3.36, 191 students
  29. SIO 188: Biology of Fishes Average GPA 3.36, 183 students
  30. SIO 187: Stat Methods in Marine Biology Average GPA 3.37, 947 students
  31. SIO 173: Dynamics of Atmos & Climate Average GPA 3.38, 135 students
  32. SIO 181: Marine Biochemistry Average GPA 3.39, 1,119 students
  33. SIO 143: Ocean Acidification Average GPA 3.39, 193 students
  34. SIO 137: Ecosystems & Fisheries Average GPA 3.40, 129 students
  35. SIO 75: Geological History of Earth Average GPA 3.42, 147 students
  36. SIO 10: The Earth Average GPA 3.43, 3,134 students
  37. SIO 183: Phycology: Marine Plant Biolgy Average GPA 3.43, 207 students
  38. SIO 113: Intro to Computationl Erth Sci Average GPA 3.44, 214 students
  39. SIO 136: Marine Biology Laboratory Average GPA 3.45, 871 students
  40. SIO 50: Intro/earth&environmental Sci Average GPA 3.46, 701 students
  41. SIO 133: Marine Mammal Biology Average GPA 3.50, 1,123 students
  42. SIO 60: Exp/oceanic & Atmospheric Sci Average GPA 3.50, 217 students
  43. SIO 115: Ice and the Climate System Average GPA 3.50, 198 students
  44. SIO 3: Life in the Oceans Average GPA 3.51, 1,017 students
  45. SIO 135: Satellite Remote Sensing Average GPA 3.51, 217 students
  46. SIO 121: Biology of the Cryosphere Average GPA 3.51, 126 students
  47. SIO 12: History of Earth & Evolution Average GPA 3.52, 879 students
  48. SIO 147: Applications of Phylogenetics Average GPA 3.55, 133 students
  49. SIO 125: Biomechanics of Marine Life Average GPA 3.56, 178 students
  50. SIO 190L: Spc Topic/earth/ocean/atmo-lab Average GPA 3.56, 118 students
  51. SIO 40: Life and Climate on Earth Average GPA 3.59, 1,523 students
  52. SIO 175: Analysis Ocean/atmosph Data Average GPA 3.61, 174 students
  53. SIO 145: Intro Field Method Bio Ocean Average GPA 3.61, 102 students
  54. SIO 107: Water Pollution Average GPA 3.62, 109 students
  55. SIO 45: Volcanoes Average GPA 3.63, 1,140 students
  56. SIO 120: Introduction to Mineralogy Average GPA 3.69, 253 students
  57. SIO 15: Natural Disasters Average GPA 3.70, 2,697 students
  58. SIO 116: Climate Change & Global Health Average GPA 3.70, 159 students
  59. SIO 170: Introduction to Volcanology Average GPA 3.70, 147 students
  60. SIO 123: Microbial Env Systems Biology Average GPA 3.71, 245 students
  61. SIO 164: Underwater Archaeology Average GPA 3.71, 199 students
  62. SIO 109R: Bending/Curve: Climate Change Average GPA 3.76, 284 students
  63. SIO 190: Special Topic/earth/ocean/atmo Average GPA 3.76, 188 students
  64. SIO 35: Water Average GPA 3.78, 1,485 students
  65. SIO 20R: The Atmosphere Average GPA 3.79, 876 students
  66. SIO 110: Intro Gis & Gps for Scientists Average GPA 3.79, 255 students
  67. SIO 105: Sedimentology & Stratigraphy Average GPA 3.91, 143 students

See also: Easiest classes, UCSD course catalog, SIO course catalog.

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