| Elements of the Periodic Table | 0 | - | 5.00 | 2,245,368 |
| Elements by Symbol | 0 | - | 4.92 | 197,427 |
| Speed Symbol by Element | 0 | - | 4.90 | 104,799 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,291 |
| Noble Gases | 0 | - | 4.89 | 78,281 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,649 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,455 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,777 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 17,945 |
| Elemental Words | 0 | - | 4.97 | 52,324 |
| Metals of Antiquity | 0 | - | 4.95 | 93,499 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 36,626 |
| Elements - Sudden Death | 0 | - | 4.91 | 131,843 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 55,816 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,019 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,906 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,549 |
| International Scientific Units | 0 | - | 4.95 | 157,067 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,843 |
| Random Symbol to Element | 0 | - | 4.88 | 93,158 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.53 | 12,200 |
| Click the Chemical Element | 0 | - | 4.96 | 80,600 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,935 |
| Name the Virus | 0 | - | 4.87 | 76,805 |
| Elements by Picture | 0 | - | 4.27 | 70,006 |
| Major Taxonomic Ranks | 0 | - | 4.56 | 80,661 |
| Famous Scientists | 0 | - | 4.57 | 42,673 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,055 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,977 |
| Name a Valid Element | 0 | - | 4.67 | 70,103 |
| Scientific Names | 0 | - | 4.32 | 78,495 |
| Name the Metal Alloy | 0 | - | 4.73 | 13,794 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,020 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,843 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,210 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,907 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 63,976 |
| Bones - Sudden Death | 0 | - | 4.95 | 51,202 |
| Famous Effects | 0 | - | 4.62 | 12,551 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,614 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,737 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,732 |
| Body Part Cliches | 0 | - | 4.43 | 123,368 |
| Bones of the Human Body | 0 | - | 4.52 | 42,639 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,223 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,120 |
| Astronomy Quiz | 0 | - | 4.90 | 82,692 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,421 |
| Solar System Trivia | 0 | - | 4.93 | 46,707 |
| Click the Planet | 0 | - | 4.96 | 91,517 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,566 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,605 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,642 |
| Environmental Issues | 0 | - | 4.54 | 26,842 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,004 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,303 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,162 |
| Science General Knowledge #2 | 0 | - | 4.48 | 118,919 |
| Science General Knowledge #3 | 0 | - | 4.56 | 108,872 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,686 |
| Word Chain - Science | 0 | - | 4.59 | 54,928 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,731 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,098,158 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,977 |
| The Sun Quiz | 0 | - | 4.93 | 34,733 |
| First Names of Scientists | 0 | - | 4.51 | 56,923 |
| Groups of Two - Science | 0 | - | 4.26 | 48,343 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,898 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,024 |
| Science Decoder | 0 | - | 4.52 | 28,781 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,349 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,310 |
| Science True or False | 0 | - | 4.35 | 40,335 |
| Medical Acronyms | 0 | - | 4.43 | 96,884 |
| Medical Vocabulary | 0 | - | 4.54 | 59,150 |
| Birthstones by Month | 0 | - | 4.42 | 80,726 |
| Citrus Fruits | 0 | - | 3.63 | 42,082 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,191 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,398 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,375 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,913 |
| Body Part Words | 0 | - | 4.43 | 146,021 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,838 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,646 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,642 |
| Human Body A-Z | 0 | - | 4.51 | 129,240 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,228 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,364 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,684 |
| Medical Specialties | 0 | - | 4.32 | 91,802 |
| The Diseases They Had | 0 | - | 4.15 | 14,020 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.69 | 57,834 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,833 |
| The Pluto Quiz | 0 | - | 4.61 | 9,862 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,531 |
| Astronomy Decoder | 0 | - | 4.49 | 38,078 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,464 |
| The Mars Quiz | 0 | - | 4.55 | 18,672 |
| The Saturn Quiz | 0 | - | 4.54 | 11,561 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,605 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,000 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 226,018 |
| Name the Constellations | 0 | - | 4.58 | 45,007 |
| Astronomy True or False | 0 | - | 4.39 | 36,496 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,825 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,381 |
| The Venus Quiz | 0 | - | 4.21 | 6,929 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,340 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,434 |
| Elements Named for Countries | 0 | - | 4.53 | 24,743 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,728 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,567 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,500 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,462 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,334 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,473 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,733 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,156 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,694 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,643 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,009 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,828 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,578 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,697 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,607 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,656 |
| Least-Forested Countries | 0 | - | 4.53 | 65,240 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,477 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,523 |
| Most Forested European Countries | 0 | - | 4.80 | 75,388 |
| Least Forested European Countries | 0 | - | 4.25 | 54,040 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,744 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,837 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,535 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,113 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,665 |
| Countries with Glaciers | 0 | - | 4.97 | 105,477 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,153 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,284 |
