| International Scientific Units | 0 | - | 4.95 | 155,326 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,212 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,220,156 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,823 |
| Famous Scientists | 0 | - | 4.57 | 42,449 |
| Elements by Symbol | 0 | - | 4.92 | 195,490 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,607 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,439 |
| Noble Gases | 0 | - | 4.89 | 77,439 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,042 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,896 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,863 |
| Name the Virus | 0 | - | 4.86 | 76,243 |
| Scientific Names | 0 | - | 4.32 | 78,157 |
| Famous Effects | 0 | - | 4.62 | 12,096 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 16,816 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,064 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,581 |
| Elemental Words | 0 | - | 4.96 | 51,985 |
| Metals of Antiquity | 0 | - | 4.94 | 92,897 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 61,043 |
| Bones - Sudden Death | 0 | - | 4.95 | 48,896 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 34,787 |
| Elements - Sudden Death | 0 | - | 4.91 | 125,873 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 53,718 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,032 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,904 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,275 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,191 |
| Body Part Cliches | 0 | - | 4.43 | 123,045 |
| Bones of the Human Body | 0 | - | 4.56 | 36,092 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,103 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,403 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,005 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,334 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,369 |
| Random Symbol to Element | 0 | - | 4.88 | 92,206 |
| Astronomy Quiz | 0 | - | 4.89 | 81,680 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,732 |
| Solar System Trivia | 0 | - | 4.93 | 46,019 |
| Environmental Issues | 0 | - | 4.54 | 26,718 |
| Click the Planet | 0 | - | 4.96 | 90,220 |
| Name a Valid Answer - Science | 0 | - | 4.78 | 40,064 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,094 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,434 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,613 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,180 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,255 |
| Word Chain - Science | 0 | - | 4.59 | 54,388 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,350 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,682 |
| Click the Chemical Element | 0 | - | 4.96 | 79,262 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,612 |
| Groups of Two - Science | 0 | - | 4.26 | 48,136 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,380 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,656 |
| Science Decoder | 0 | - | 4.52 | 28,649 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,155 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,095 |
| Science True or False | 0 | - | 4.35 | 39,970 |
| Elements by Picture | 0 | - | 4.28 | 69,541 |
| First Names of Scientists | 0 | - | 4.50 | 56,452 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,825 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,187 |
| Name a Valid Element | 0 | - | 4.64 | 69,564 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,636 |
| The Sun Quiz | 0 | - | 4.93 | 34,105 |
| Medical Acronyms | 0 | - | 4.43 | 96,170 |
| Medical Vocabulary | 0 | - | 4.54 | 58,526 |
| Citrus Fruits | 0 | - | 3.65 | 41,948 |
| The Diseases They Had | 0 | - | 4.15 | 13,885 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,632 |
| Birthstones by Month | 0 | - | 4.41 | 80,479 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,381 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,311 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,290 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,701 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,087 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,717 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,173 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,143 |
| Body Part Words | 0 | - | 4.43 | 145,211 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,662 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,790 |
| Three Letter Body Parts | 0 | - | 4.40 | 204,903 |
| Human Body A-Z | 0 | - | 4.51 | 128,377 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,714 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,375 |
| Medical Specialties | 0 | - | 4.29 | 90,896 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,503 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,159 |
| The Pluto Quiz | 0 | - | 4.60 | 9,777 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,199 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,299 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,229 |
| Astronomy Decoder | 0 | - | 4.50 | 37,841 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,386 |
| The Mars Quiz | 0 | - | 4.55 | 18,575 |
| The Saturn Quiz | 0 | - | 4.54 | 11,499 |
| Most Common Body Part Words | 0 | - | 3.91 | 31,522 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,081 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,656 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,536 |
| Name the Constellations | 0 | - | 4.58 | 44,655 |
| Astronomy True or False | 0 | - | 4.38 | 36,264 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,553 |
| The Venus Quiz | 0 | - | 4.21 | 6,887 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,022 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,041 |
| Elements Named for Countries | 0 | - | 4.52 | 24,385 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,631 |
| Animals by Skeleton Image | 0 | - | 4.80 | 45,977 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,352 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,304 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,855 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,760 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,537 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,101 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,228 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,456 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,780 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,678 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,081 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,358 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,623 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,419 |
| Least-Forested Countries | 0 | - | 4.53 | 64,897 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,181 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,180 |
| Most Forested European Countries | 0 | - | 4.80 | 74,905 |
| Least Forested European Countries | 0 | - | 4.25 | 53,782 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,417 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,673 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,310 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,703 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,436 |
| Countries with Glaciers | 0 | - | 4.97 | 104,653 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,065 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,012 |
