| International Scientific Units | 0 | - | 4.95 | 157,502 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,044 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,250,717 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,865 |
| Famous Scientists | 0 | - | 4.57 | 42,743 |
| Elements by Symbol | 0 | - | 4.92 | 197,849 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,063 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,446 |
| Noble Gases | 0 | - | 4.89 | 78,502 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,799 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,827 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,997 |
| Name the Virus | 0 | - | 4.87 | 76,920 |
| Famous Effects | 0 | - | 4.62 | 12,656 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 18,247 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,134 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,116 |
| Elemental Words | 0 | - | 4.96 | 52,413 |
| Metals of Antiquity | 0 | - | 4.95 | 93,658 |
| Body Parts - Sudden Death #1 | 0 | - | 4.86 | 66,034 |
| Bones - Sudden Death | 0 | - | 4.95 | 52,935 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 37,188 |
| Elements - Sudden Death | 0 | - | 4.92 | 133,558 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 56,408 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,760 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,354 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,045 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,202 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,658 |
| Body Part Cliches | 0 | - | 4.44 | 123,575 |
| Bones of the Human Body | 0 | - | 4.51 | 43,155 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,553 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,598 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.53 | 12,246 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,668 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,723 |
| Random Symbol to Element | 0 | - | 4.88 | 93,458 |
| Astronomy Quiz | 0 | - | 4.90 | 82,905 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,812 |
| Solar System Trivia | 0 | - | 4.93 | 46,874 |
| Environmental Issues | 0 | - | 4.54 | 26,870 |
| Click the Planet | 0 | - | 4.96 | 91,786 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,149 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,379 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,469 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,095 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,139 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,791 |
| Word Chain - Science | 0 | - | 4.59 | 55,013 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,813 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,183 |
| Body Parts - Sudden Death #2 | 0 | - | 4.79 | 43,898 |
| Click the Chemical Element | 0 | - | 4.96 | 80,833 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,099,660 |
| Groups of Two - Science | 0 | - | 4.26 | 48,386 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,008 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,095 |
| Science Decoder | 0 | - | 4.52 | 28,810 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,396 |
| Science True or False | 0 | - | 4.35 | 40,397 |
| Elements by Picture | 0 | - | 4.27 | 70,117 |
| First Names of Scientists | 0 | - | 4.51 | 57,039 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,119 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,158 |
| Name a Valid Element | 0 | - | 4.67 | 70,206 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 36,044 |
| The Sun Quiz | 0 | - | 4.93 | 34,845 |
| Medical Acronyms | 0 | - | 4.43 | 97,036 |
| Medical Vocabulary | 0 | - | 4.54 | 59,278 |
| Citrus Fruits | 0 | - | 3.64 | 42,103 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,748 |
| The Diseases They Had | 0 | - | 4.15 | 14,037 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,882 |
| Birthstones by Month | 0 | - | 4.42 | 80,790 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,354 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,414 |
| Name the Metal Alloy | 0 | - | 4.73 | 13,885 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,893 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,260 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,468 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,079 |
| Body Part Words | 0 | - | 4.43 | 146,188 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,891 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,797 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,773 |
| Human Body A-Z | 0 | - | 4.51 | 129,424 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,375 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,590 |
| Medical Specialties | 0 | - | 4.32 | 91,920 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,022 |
| Element... or Pokémon? | 0 | - | 4.98 | 132,284 |
| The Pluto Quiz | 0 | - | 4.61 | 9,888 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,598 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,829 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,870 |
| Astronomy Decoder | 0 | - | 4.48 | 38,129 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,481 |
| The Mars Quiz | 0 | - | 4.55 | 18,690 |
| The Saturn Quiz | 0 | - | 4.54 | 11,575 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,687 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,458 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,056 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 226,543 |
| Name the Constellations | 0 | - | 4.58 | 45,098 |
| Astronomy True or False | 0 | - | 4.39 | 36,538 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 216,036 |
| The Venus Quiz | 0 | - | 4.21 | 6,935 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,409 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,518 |
| Elements Named for Countries | 0 | - | 4.54 | 24,841 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,740 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,707 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,538 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,491 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,406 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,635 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,780 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,174 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,785 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,672 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,072 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,863 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,673 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,774 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,731 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,707 |
| Least-Forested Countries | 0 | - | 4.53 | 65,305 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,534 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,585 |
| Most Forested European Countries | 0 | - | 4.80 | 75,490 |
| Least Forested European Countries | 0 | - | 4.25 | 54,096 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,816 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,876 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,582 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,212 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,711 |
| Countries with Glaciers | 0 | - | 4.96 | 105,601 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,172 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,334 |
