| International Scientific Units | 0 | - | 4.95 | 157,749 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,155 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,255,030 |
| Famous Scientists | 0 | - | 4.57 | 42,788 |
| Elements by Symbol | 0 | - | 4.92 | 198,196 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,293 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,582 |
| Noble Gases | 0 | - | 4.89 | 78,649 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,911 |
| Periodic Table Symbols | 0 | - | 4.97 | 74,873 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 82,162 |
| Name the Virus | 0 | - | 4.87 | 76,998 |
| Scientific Names | 0 | - | 4.32 | 78,655 |
| Famous Effects | 0 | - | 4.62 | 12,738 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 18,475 |
| Body Parts - Sudden Death #1 | 0 | - | 4.86 | 66,463 |
| Bones - Sudden Death | 0 | - | 4.95 | 53,254 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 37,499 |
| Elements - Sudden Death | 0 | - | 4.93 | 134,553 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,144 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,189 |
| Elemental Words | 0 | - | 4.97 | 52,478 |
| Metals of Antiquity | 0 | - | 4.95 | 93,770 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 56,745 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,866 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,413 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,070 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,499 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,727 |
| Body Part Cliches | 0 | - | 4.44 | 123,616 |
| Bones of the Human Body | 0 | - | 4.51 | 43,349 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,748 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,632 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.46 | 12,281 |
| Click the Planet | 0 | - | 4.96 | 91,976 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,714 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,780 |
| Random Symbol to Element | 0 | - | 4.88 | 93,594 |
| Astronomy Quiz | 0 | - | 4.90 | 83,044 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 138,088 |
| Solar System Trivia | 0 | - | 4.93 | 46,987 |
| Environmental Issues | 0 | - | 4.54 | 26,886 |
| Body Parts - Sudden Death #2 | 0 | - | 4.80 | 45,383 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,277 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,405 |
| Science General Knowledge #1 | 0 | - | 4.54 | 167,051 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,505 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,410 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,872 |
| Word Chain - Science | 0 | - | 4.59 | 55,075 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,883 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,313 |
| Click the Chemical Element | 0 | - | 4.96 | 81,067 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,100,908 |
| Groups of Two - Science | 0 | - | 4.26 | 48,424 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,091 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,152 |
| Science Decoder | 0 | - | 4.52 | 28,832 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,462 |
| Science True or False | 0 | - | 4.35 | 40,446 |
| Elements by Picture | 0 | - | 4.27 | 70,201 |
| First Names of Scientists | 0 | - | 4.51 | 57,125 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,159 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,287 |
| Name a Valid Element | 0 | - | 4.67 | 70,301 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 36,113 |
| The Sun Quiz | 0 | - | 4.93 | 34,956 |
| Medical Acronyms | 0 | - | 4.43 | 97,130 |
| Medical Vocabulary | 0 | - | 4.54 | 59,376 |
| Citrus Fruits | 0 | - | 3.66 | 42,130 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,781 |
| The Diseases They Had | 0 | - | 4.15 | 14,049 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,914 |
| Birthstones by Month | 0 | - | 4.43 | 86,742 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,440 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,428 |
| Name the Metal Alloy | 0 | - | 4.73 | 13,956 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,930 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,292 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,536 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,208 |
| Body Part Words | 0 | - | 4.43 | 146,276 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,923 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,902 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,827 |
| Human Body A-Z | 0 | - | 4.51 | 129,525 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,450 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,730 |
| Medical Specialties | 0 | - | 4.32 | 91,986 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,127 |
| Element... or Pokémon? | 0 | - | 4.98 | 132,595 |
| The Pluto Quiz | 0 | - | 4.61 | 9,902 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,662 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,892 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,973 |
| Astronomy Decoder | 0 | - | 4.48 | 38,165 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,499 |
| The Mars Quiz | 0 | - | 4.55 | 18,701 |
| The Saturn Quiz | 0 | - | 4.54 | 11,584 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,760 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,508 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,105 |
| Signs of the Zodiac Quiz | 0 | - | 4.46 | 227,092 |
| Name the Constellations | 0 | - | 4.58 | 45,214 |
| Astronomy True or False | 0 | - | 4.39 | 36,569 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 216,228 |
| The Venus Quiz | 0 | - | 4.21 | 6,940 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,456 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,587 |
| Elements Named for Countries | 0 | - | 4.52 | 24,900 |
| Countries with Glaciers | 0 | - | 4.97 | 105,682 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,181 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,753 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,801 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,570 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,512 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,480 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.10 | 26,764 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,804 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,183 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,857 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,703 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,115 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.25 | 25,891 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,753 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,824 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,832 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,730 |
| Least-Forested Countries | 0 | - | 4.53 | 65,354 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,574 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,641 |
| Most Forested European Countries | 0 | - | 4.80 | 75,558 |
| Least Forested European Countries | 0 | - | 4.25 | 54,131 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,864 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,911 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,630 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,266 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,743 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,392 |
