| Taken | Quiz |
|---|
| 1,661,672 | Elements of the Periodic Table Quiz |
| 932,611 | Planets of the Solar System Quiz |
| 190,179 | Three Letter Body Parts Quiz |
| 184,239 | Songs with Body Parts in the Title |
| 182,929 | Signs of the Zodiac Quiz |
| 155,178 | Elements by Symbol Quiz |
| 150,896 | Word Scramble - Body Parts |
| 133,172 | Periodic Table Quiz - First 20 Elements |
| 130,392 | Body Part Words Quiz |
| 126,264 | Countries with the Most Forest |
| 122,616 | Science General Knowledge #1 |
| 115,251 | Body Part Cliches |
| 114,556 | Most Common Elements in the Human Body |
| 112,844 | International Scientific Units |
| 107,287 | Medical Conditions Quiz |
| 99,600 | Human Body A-Z |
| 95,012 | Organs of the Human Body (with map) |
| 89,463 | Countries with the Highest Carbon Dioxide Emissions |
| 88,230 | Largest Objects in the Solar System |
| 86,219 | Science General Knowledge #2 |
| 83,305 | "Ologies" Quiz |
| 82,891 | Element... or Pokémon? |
| 81,007 | Medical Acronyms |
| 79,915 | Speed Symbol by Element |
| 77,993 | Medical Specialties |
| 73,845 | One-Syllable Human Body Parts |
| 73,003 | Countries with Glaciers |
| 72,804 | Science Multiple Choice #1 |
| 72,680 | Science General Knowledge #3 |
| 70,790 | Chemical Elements with Short Names |
| 65,929 | Periodic Table Elements A-Z |
| 64,457 | Tropical Rainforest Countries |
| 64,127 | Metals of Antiquity |
| 63,901 | Random Symbol to Element |
| 60,885 | Major Taxonomic Ranks |
| 60,710 | Most Forested European Countries |
| 59,884 | Science Vocabulary #1 |
| 59,106 | Scientific Names |
| 59,017 | Periodic Table Elements Mentioned in the Bible |
| 58,089 | Dumb it Down Doc |
| 57,678 | Name the Virus |
| 55,792 | Animal Anatomy Quiz |
| 55,469 | Least Forested Countries in Asia |
| 54,940 | Astronomy Quiz |
| 54,680 | Noble Gases |
| 54,283 | Top 10 Most Forested Countries in Asia |
| 53,887 | Worst Plastic Polluting Countries |
| 53,352 | Elements with One-Letter Symbols |
| 51,734 | Top 10 Solar Power Countries |
| 48,940 | Least-Forested Countries |
| 48,840 | Answers are Elements #2 |
| 48,485 | Science Vocabulary #2 |
| 48,357 | Answers are Elements #1 |
| 47,837 | First Names of Scientists |
| 47,204 | Countries by Carbon Dioxide Emissions per Capita |
| 47,160 | Medical Vocabulary |
| 47,155 | Click the Chemical Element |
| 46,716 | Least Forested European Countries |
| 46,483 | Elements that are Gases at Room Temperature |
| 45,880 | Countries with the Most Forest A-Z |
| 45,261 | Periodic Table Elements by Clue |
| 44,508 | Countries by Change in Carbon Dioxide Emissions |
| 43,323 | Name a Valid Element |
| 43,271 | Groups of Two - Science |
| 43,257 | Science Vocabulary #3 |
| 43,105 | Electromagnetic Spectrum |
| 42,871 | Elements by Picture |
| 42,346 | Elemental Words |
| 40,871 | Category Elimination - Elements |
| 40,830 | Click the Planet |
| 40,738 | Countries with Tropical Rainforest and Glaciers |
| 39,819 | Planets By Picture Quiz |
| 39,694 | Citrus Fruits |
| 39,628 | Countries with the Most HIV |
| 37,572 | Famous Scientists |
| 37,559 | Name the Constellations Quiz |
| 37,277 | Diseases and Medical Conditions A-Z |
| 36,613 | Most Guessed Elements on JetPunk |
| 36,537 | Word Chain - Science |
| 36,160 | Periodic Table Symbols Quiz |
| 36,037 | Things Named For People #3 - Science |
| 35,675 | Metals by Total Mined Value |
| 33,835 | Fish... or Not a Fish? |
| 32,023 | Science True or False |
| 31,839 | Countries with the Highest Percentage of Forest |
| 31,684 | Top 10 Least-Forested U.S. States |
| 31,416 | Top 10 Most-Forested U.S. States |
| 30,822 | Planets - Multiple Choice |
| 30,824 | Animals by Skeleton Image |
| 30,701 | Astronomy True or False |
| 30,585 | Solar System Trivia |
| 30,455 | Diseases: Virus... or Bacteria? |
| 30,273 | Body Parts in History and Culture |
| 30,037 | Science Multiple Choice #2 |
| 29,595 | Countries with the Most Mangroves |
| 29,588 | Countries with the Most Malaria Deaths |
| 28,842 | Bones in the Human Body |
| 28,688 | First 30 Elements Periodic Table |
| 27,896 | Most Common Body Part Words |
| 27,528 | Science Multiple Choice #3 |
| 26,392 | Astronomy Decoder |
| 26,396 | Name the Constellations - With a Map |
| 24,903 | Lightest Chemical Elements A-Z |
| 24,704 | Science Decoder |
| 24,158 | Rocks and Minerals Picture Quiz |
| 23,696 | Environmental Issues |
| 23,052 | Name a Valid Answer - Science |
| 22,970 | The Sun Quiz |
| 22,406 | Animals - Taxonomy to Common Name |
| 20,044 | Countries that Desalinate the Most Water |
| 20,029 | U.S. States with the Most Drug Overdose Deaths |
| 18,435 | Body Parts - No Vowels |
| 16,734 | Northernmost Countries Without Glaciers |
| 16,306 | U.S. States with Glaciers |
| 15,854 | 16 Questions that Prove that Physics Makes No Sense |
| 15,592 | The Mars Quiz |
| 14,599 | Brightest Objects in the Sky |
| 12,761 | Largest Countries Without Glaciers |
| 12,668 | Elements of the Periodic Table by Symbol |
| 12,455 | Recommended Childhood Vaccines for Americans |
| 12,066 | The Diseases They Had |
| 11,938 | Top 10 U.S. States by Solar Power |
| 11,379 | Albert Einstein Quiz |
| 10,181 | The Voyage of Darwin - Animated Map Quiz |
| 10,107 | The Jupiter Quiz |
| 9,747 | Click Every Chemical Symbol |
| 9,477 | The Saturn Quiz |
| 9,045 | Physics Equations |
| 8,888 | Bones of the Human Body (with a map) |
| 8,432 | Periodic table challenge - IN ORDER! |
| 7,960 | Random Element to Atomic Number |
| 7,611 | Simple Machines Quiz |
| 7,544 | Amino Acids to 1 Letter Code |
| 7,309 | The Pluto Quiz |
| 7,305 | Astronomy & Space |
| 7,237 | The Elements of the Periodic Table |
| 6,545 | Organs of the Body |
| 6,505 | Medicine and Anatomy by Letter - A |
| 6,425 | Random Elements on the Periodic Table |
| 6,093 | First 28 Countries of Wuhan Coronavirus COVID-19 Outbreak |
| 5,742 | The Venus Quiz |
| 5,573 | Moons of the Solar System |
| 5,360 | Science General Knowledge #1 |
| 5,045 | First 50 Elements |
| 4,964 | First 60 Elements |
| 4,722 | Physics General Knowledge |
| 4,449 | Scientific Groups of Things #1 |
| 4,447 | Name the Planets* |
| 4,405 | Click the Chemical Element #2 |
| 4,398 | Countries That Discovered the Elements of the Periodic Table |
| 4,331 | First 40 Elements |
| 4,101 | Astronomy General Knowledge Quiz #1 |
| 4,011 | Random Constellations on a Map |
| 3,801 | Space and Astronomy General Knowledge |
| 3,763 | Human Skeleton |
| 3,542 | Seven Strong Acids Quiz |
| 3,534 | Biology Vocabulary |
| 3,450 | Medical Terms in Groups of Three |
| 3,437 | Causes of Death on Mount Everest |
| 3,406 | Periodic Table Quiz by Borders in 60 Seconds |
| 3,311 | The 8 Planets of Solar System - Map Quiz |
| 3,293 | Human Biology Multiple Choice Quiz #3 |
| 3,236 | Elements of the Periodic Table in Alphabetical Order |
| 3,167 | Muscles of the Human Body |
| 3,133 | Medicine and Anatomy by Letter - B |
| 3,112 | Physics, Famous Physicists |
| 3,081 | Random Sequential Elements on the Periodic Table |
| 2,819 | Constellation Map |
| 2,789 | Medicine and Anatomy by Letter - C |
| 2,740 | Parts of the Brain |
| 2,722 | Periodic Table of Elements - in Order |
| 2,700 | -Ectomy Quiz |
| 2,601 | Medicine and Anatomy by Letter - D |
| 2,589 | Science by Letter - A |
| 2,571 | Amino acids |
| 2,574 | Name Elements Containing Each Letter A-Z |
| 2,569 | Uses of Greek Letter in Science and Mathematics |
| 2,568 | Medicine and Anatomy by Letter - F |
| 2,549 | Category Elimination - Elements (Expert) |
| 2,528 | Medical Terminology A-Z |
| 2,487 | Countries with the 50 Oldest Living People |
| 2,451 | Scientific Groups of Things #2 |
| 2,449 | Organic chemistry functional groups |
| 2,424 | Astronomy General Knowledge Quiz #2 |
| 2,409 | Medical prefixes and suffixes |
| 2,340 | Anatomy of the Human Eye Map Quiz |
| 2,337 | General Knowledge Science Quiz |
| 2,272 | 53 of the Most Important Scientists |
| 2,267 | A to Z: Infectious Diseases |
| 2,260 | Planets and Moons of the Solar System |
| 2,239 | First 20 elements of the Periodic table in 30 seconds |
| 2,224 | Science A-Z |
| 2,191 | Top 20 Least Forested Countries |
