| Elements of the Periodic Table | 0 | - | 5.00 | 2,220,318 |
| Elements by Symbol | 0 | - | 4.92 | 195,503 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,623 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,446 |
| Noble Gases | 0 | - | 4.89 | 77,447 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,046 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,905 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,867 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 16,834 |
| Elemental Words | 0 | - | 4.96 | 51,986 |
| Metals of Antiquity | 0 | - | 4.94 | 92,904 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 34,796 |
| Elements - Sudden Death | 0 | - | 4.91 | 125,926 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 53,735 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,904 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,290 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,194 |
| International Scientific Units | 0 | - | 4.95 | 155,333 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,220 |
| Random Symbol to Element | 0 | - | 4.88 | 92,212 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,009 |
| Click the Chemical Element | 0 | - | 4.96 | 79,269 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,695 |
| Name the Virus | 0 | - | 4.86 | 76,249 |
| Elements by Picture | 0 | - | 4.28 | 69,548 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,829 |
| Famous Scientists | 0 | - | 4.57 | 42,451 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,825 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,191 |
| Name a Valid Element | 0 | - | 4.64 | 69,571 |
| Scientific Names | 0 | - | 4.32 | 78,162 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,292 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,584 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,701 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,088 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,170 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 61,060 |
| Bones - Sudden Death | 0 | - | 4.95 | 48,925 |
| Famous Effects | 0 | - | 4.62 | 12,100 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,039 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,303 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,232 |
| Body Part Cliches | 0 | - | 4.43 | 123,050 |
| Bones of the Human Body | 0 | - | 4.56 | 36,452 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,110 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,064 |
| Astronomy Quiz | 0 | - | 4.89 | 81,687 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,747 |
| Solar System Trivia | 0 | - | 4.93 | 46,028 |
| Click the Planet | 0 | - | 4.96 | 90,230 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,405 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,338 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,374 |
| Environmental Issues | 0 | - | 4.54 | 26,720 |
| Name a Valid Answer - Science | 0 | - | 4.78 | 40,068 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,096 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,447 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,622 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,188 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,257 |
| Word Chain - Science | 0 | - | 4.59 | 54,391 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,351 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,684 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,639 |
| The Sun Quiz | 0 | - | 4.93 | 34,108 |
| First Names of Scientists | 0 | - | 4.50 | 56,456 |
| Groups of Two - Science | 0 | - | 4.26 | 48,137 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,382 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,657 |
| Science Decoder | 0 | - | 4.52 | 28,649 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,156 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,095 |
| Science True or False | 0 | - | 4.35 | 39,973 |
| Medical Acronyms | 0 | - | 4.43 | 96,173 |
| Medical Vocabulary | 0 | - | 4.54 | 58,529 |
| Birthstones by Month | 0 | - | 4.41 | 80,480 |
| Citrus Fruits | 0 | - | 3.65 | 41,949 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,382 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,313 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,722 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,180 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,146 |
| Body Part Words | 0 | - | 4.43 | 145,216 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,664 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,799 |
| Three Letter Body Parts | 0 | - | 4.40 | 204,909 |
| Human Body A-Z | 0 | - | 4.51 | 128,388 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,720 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,390 |
| Medical Specialties | 0 | - | 4.29 | 90,896 |
| The Diseases They Had | 0 | - | 4.15 | 13,886 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,508 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,634 |
| The Pluto Quiz | 0 | - | 4.60 | 9,777 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,201 |
| Astronomy Decoder | 0 | - | 4.50 | 37,843 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,386 |
| The Mars Quiz | 0 | - | 4.55 | 18,575 |
| The Saturn Quiz | 0 | - | 4.54 | 11,500 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,656 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,561 |
| Name the Constellations | 0 | - | 4.58 | 44,656 |
| Astronomy True or False | 0 | - | 4.38 | 36,264 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,556 |
| Most Common Body Part Words | 0 | - | 3.91 | 31,523 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,082 |
| The Venus Quiz | 0 | - | 4.21 | 6,887 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,026 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,044 |
| Elements Named for Countries | 0 | - | 4.52 | 24,387 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,631 |
| Animals by Skeleton Image | 0 | - | 4.80 | 45,980 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,353 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,307 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,861 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,760 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,538 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,103 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,232 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,458 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,782 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,680 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,086 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,362 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,630 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,426 |
| Least-Forested Countries | 0 | - | 4.53 | 64,898 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,181 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,183 |
| Most Forested European Countries | 0 | - | 4.80 | 74,907 |
| Least Forested European Countries | 0 | - | 4.25 | 53,782 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,419 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,673 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,311 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,706 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,438 |
| Countries with Glaciers | 0 | - | 4.97 | 104,656 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,065 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,013 |
