| Taken | Quiz |
|---|
| 1,755,944 | Elements of the Periodic Table Quiz |
| 957,754 | Planets of the Solar System Quiz |
| 193,816 | Three Letter Body Parts Quiz |
| 189,957 | Songs with Body Parts in the Title |
| 187,196 | Signs of the Zodiac Quiz |
| 161,933 | Elements by Symbol Quiz |
| 161,324 | Word Scramble - Body Parts |
| 146,098 | Periodic Table Quiz - First 20 Elements |
| 133,302 | Body Part Words Quiz |
| 129,627 | Countries with the Most Forest |
| 128,216 | Science General Knowledge #1 |
| 126,185 | International Scientific Units |
| 118,288 | Most Common Elements in the Human Body |
| 116,528 | Body Part Cliches |
| 110,203 | Medical Conditions Quiz |
| 102,374 | Human Body A-Z |
| 97,763 | Organs of the Human Body (with map) |
| 95,518 | Largest Objects in the Solar System |
| 92,680 | Element... or Pokémon? |
| 92,203 | Countries with the Highest Carbon Dioxide Emissions |
| 90,013 | Science General Knowledge #2 |
| 85,863 | "Ologies" Quiz |
| 83,511 | Speed Symbol by Element |
| 83,435 | Medical Acronyms |
| 81,821 | Science General Knowledge #3 |
| 80,337 | Medical Specialties |
| 78,942 | Periodic Table Elements A-Z |
| 76,095 | One-Syllable Human Body Parts |
| 75,758 | Birthstones Quiz |
| 75,419 | Countries with Glaciers |
| 75,101 | Science Multiple Choice #1 |
| 73,057 | Chemical Elements with Short Names |
| 71,374 | Random Symbol to Element |
| 66,501 | Metals of Antiquity |
| 65,890 | Tropical Rainforest Countries |
| 64,504 | Major Taxonomic Ranks |
| 63,056 | Most Forested European Countries |
| 61,970 | Science Vocabulary #1 |
| 61,803 | Periodic Table Elements Mentioned in the Bible |
| 60,034 | Scientific Names |
| 59,332 | Dumb it Down Doc |
| 59,255 | Name the Virus |
| 58,443 | Astronomy Quiz |
| 57,234 | Least Forested Countries in Asia |
| 56,571 | Animal Anatomy Quiz |
| 56,557 | Noble Gases |
| 55,957 | Top 10 Most Forested Countries in Asia |
| 55,835 | Elements with One-Letter Symbols |
| 55,732 | Worst Plastic Polluting Countries |
| 53,770 | Top 10 Solar Power Countries |
| 53,590 | Click the Chemical Element |
| 50,658 | Science Vocabulary #2 |
| 50,241 | Answers are Elements #2 |
| 50,102 | Least-Forested Countries |
| 49,549 | First Names of Scientists |
| 49,428 | Medical Vocabulary |
| 49,293 | Answers are Elements #1 |
| 47,900 | Elements that are Gases at Room Temperature |
| 47,656 | Countries with the Most Forest A-Z |
| 47,632 | Least Forested European Countries |
| 47,547 | Countries by Carbon Dioxide Emissions per Capita |
| 46,961 | Word Chain - Science |
| 46,710 | Periodic Table Elements by Clue #1 |
| 45,790 | Countries by Change in Carbon Dioxide Emissions |
| 45,577 | Name a Valid Element |
| 45,098 | Most Guessed Elements on JetPunk |
| 45,010 | Click the Planet |
| 44,903 | Science Vocabulary #3 |
| 44,713 | Electromagnetic Spectrum |
| 44,338 | Groups of Two - Science |
| 44,275 | Elemental Words |
| 44,087 | Elements by Picture |
| 43,386 | Category Elimination - Elements |
| 43,169 | Planets - Multiple Choice |
| 42,850 | Planets By Picture Quiz |
| 42,068 | Periodic Table Symbols Quiz |
| 42,034 | Countries with Tropical Rainforest and Glaciers |
| 41,043 | Countries with the Most HIV |
| 40,059 | Citrus Fruits |
| 39,160 | Diseases and Medical Conditions A-Z |
| 38,852 | Name the Constellations Quiz |
| 38,740 | Famous Scientists |
| 37,868 | Things Named For People #3 - Science |
| 37,377 | Metals by Total Mined Value |
| 35,458 | Fish... or Not a Fish? |
| 33,386 | Solar System Trivia |
| 33,307 | Animals by Skeleton Image |
| 33,288 | Countries with the Highest Percentage of Forest |
| 33,228 | Science True or False |
| 32,906 | Top 10 Least-Forested U.S. States |
| 32,810 | First 30 Elements Periodic Table |
| 32,215 | Top 10 Most-Forested U.S. States |
| 31,867 | Diseases: Virus... or Bacteria? |
| 31,712 | Astronomy True or False |
| 31,220 | Body Parts in History and Culture |
| 30,993 | Science Multiple Choice #2 |
| 30,561 | Countries with the Most Mangroves |
| 30,493 | Countries with the Most Malaria Deaths |
| 30,071 | Lightest Chemical Elements A-Z |
| 29,536 | Bones in the Human Body |
| 28,638 | Science Multiple Choice #3 |
| 28,560 | Most Common Body Part Words |
| 28,050 | Name the Constellations - With a Map |
| 27,593 | Astronomy Decoder |
| 26,046 | Name a Valid Answer - Science |
| 25,820 | Science Decoder |
| 25,307 | Rocks and Minerals Picture Quiz |
| 25,259 | The Sun Quiz |
| 24,296 | Environmental Issues |
| 23,652 | Animals - Taxonomy to Common Name |
| 21,665 | Top 10 U.S. States by Solar Power |
| 21,381 | Countries that Desalinate the Most Water |
| 20,601 | U.S. States with the Most Drug Overdose Deaths |
| 19,080 | Body Parts - No Vowels |
| 17,855 | Northernmost Countries Without Glaciers |
| 17,861 | U.S. States with Glaciers |
| 16,794 | 16 Questions that Prove that Physics Makes No Sense |
| 16,552 | Albert Einstein Quiz |
| 16,423 | The Mars Quiz |
| 15,374 | Brightest Objects in the Sky |
| 14,691 | Elements Named for Countries |
| 14,440 | The Jupiter Quiz |
| 14,329 | Largest Countries Without Glaciers |
| 13,024 | Recommended Childhood Vaccines for Americans |
| 13,015 | Elements of the Periodic Table by Symbol |
| 12,465 | The Diseases They Had |
| 11,951 | Click Every Chemical Symbol |
| 11,323 | Bones of the Human Body (with a map) |
| 11,174 | The Voyage of Darwin - Animated Map Quiz |
| 10,158 | The Saturn Quiz |
| 9,446 | Physics Equations |
| 9,021 | First 40 Elements |
| 8,564 | Periodic table challenge - IN ORDER! |
| 8,204 | Amino Acids to 1 Letter Code |
| 8,172 | Random Element to Atomic Number |
| 8,023 | The Pluto Quiz |
| 8,004 | Simple Machines Quiz |
| 7,772 | Medicine and Anatomy by Letter - A |
| 7,542 | A Quiz About Diamonds |
| 7,519 | Astronomy & Space |
| 7,558 | Random Elements on the Periodic Table |
| 7,373 | The Elements of the Periodic Table |
| 7,302 | Periodic Table Elements by Clue #2 |
| 6,890 | First 50 Elements |
| 6,707 | Organs of the Body |
| 6,567 | First 60 Elements |
| 6,207 | First 28 Countries of Wuhan Coronavirus COVID-19 Outbreak |
| 6,044 | The Venus Quiz |
| 5,693 | Moons of the Solar System |
| 5,640 | Science General Knowledge #1 |
| 5,333 | Name the Planets* |
| 5,005 | Physics General Knowledge |
| 4,899 | Click the Chemical Element #2 |
| 5,422 | Countries That Discovered the Elements of the Periodic Table |
| 4,593 | Scientific Groups of Things #1 |
| 4,507 | Causes of Death on Mount Everest |
| 4,380 | Random Constellations on a Map |
| 4,368 | Human Skeleton |
| 4,260 | Astronomy General Knowledge Quiz #1 |
| 4,069 | The 8 Planets of Solar System - Map Quiz |
| 3,975 | Space and Astronomy General Knowledge |
| 3,890 | Name Elements Containing Each Letter A-Z |
| 3,780 | Medicine and Anatomy by Letter - B |
| 3,711 | Biology Vocabulary |
| 3,675 | Human Biology Multiple Choice Quiz #3 |
| 3,643 | Seven Strong Acids Quiz |
| 3,631 | Periodic Table Quiz by Borders in 60 Seconds |
| 3,553 | Periodic Table of Elements - in Order |
| 3,548 | Medical Terms in Groups of Three |
| 3,435 | Medicine and Anatomy by Letter - C |
| 3,384 | Muscles of the Human Body |
| 3,362 | Elements of the Periodic Table in Alphabetical Order |
| 3,244 | Random Sequential Elements on the Periodic Table |
| 3,233 | Physics, Famous Physicists |
| 3,230 | Constellation Map |
| 3,190 | Medicine and Anatomy by Letter - D |
| 3,068 | Medicine and Anatomy by Letter - F |
| 2,913 | Parts of the Brain |
| 2,775 | -Ectomy Quiz |
| 2,770 | Medical Terminology A-Z |
| 2,718 | Science by Letter - A |
| 2,692 | Uses of Greek Letter in Science and Mathematics |
| 2,687 | Amino acids |
| 2,662 | Category Elimination - Elements (Expert) |
| 2,635 | Countries with the 50 Oldest Living People |
| 2,605 | Organic chemistry functional groups |
| 2,591 | Anatomy of the Human Eye Map Quiz |
| 2,581 | Medicine and Anatomy by Letter - E |
| 2,566 | Astronomy General Knowledge Quiz #2 |
| 2,561 | Scientific Groups of Things #2 |
| 2,557 | Crossword - Elements |
| 2,531 | General Knowledge Science Quiz |
| 2,499 | Medical prefixes and suffixes |
| 2,456 | Top 5 Countries by Cause of Death |
