| Taken | Quiz |
|---|
| 1,647,993 | Elements of the Periodic Table Quiz |
| 928,291 | Planets of the Solar System Quiz |
| 189,601 | Three Letter Body Parts Quiz |
| 182,988 | Songs with Body Parts in the Title |
| 182,071 | Signs of the Zodiac Quiz |
| 154,284 | Elements by Symbol Quiz |
| 150,419 | Word Scramble - Body Parts |
| 132,222 | Periodic Table Quiz - First 20 Elements |
| 129,855 | Body Part Words Quiz |
| 125,765 | Countries with the Most Forest |
| 121,642 | Science General Knowledge #1 |
| 115,045 | Body Part Cliches |
| 113,941 | Most Common Elements in the Human Body |
| 111,682 | International Scientific Units |
| 106,477 | Medical Conditions Quiz |
| 99,155 | Human Body A-Z |
| 94,046 | Organs of the Human Body (with map) |
| 88,998 | Countries with the Highest Carbon Dioxide Emissions |
| 87,023 | Largest Objects in the Solar System |
| 85,429 | Science General Knowledge #2 |
| 83,011 | "Ologies" Quiz |
| 81,534 | Element... or Pokémon? |
| 80,644 | Medical Acronyms |
| 79,429 | Speed Symbol by Element |
| 77,656 | Medical Specialties |
| 73,479 | One-Syllable Human Body Parts |
| 72,666 | Countries with Glaciers |
| 72,484 | Science Multiple Choice #1 |
| 72,162 | Science General Knowledge #3 |
| 70,311 | Chemical Elements with Short Names |
| 65,421 | Periodic Table Elements A-Z |
| 64,229 | Tropical Rainforest Countries |
| 63,719 | Metals of Antiquity |
| 63,384 | Random Symbol to Element |
| 60,350 | Most Forested European Countries |
| 60,263 | Major Taxonomic Ranks |
| 59,583 | Science Vocabulary #1 |
| 58,972 | Scientific Names |
| 57,891 | Dumb it Down Doc |
| 57,425 | Name the Virus |
| 55,646 | Animal Anatomy Quiz |
| 55,180 | Least Forested Countries in Asia |
| 54,434 | Astronomy Quiz |
| 54,359 | Noble Gases |
| 54,003 | Top 10 Most Forested Countries in Asia |
| 53,526 | Worst Plastic Polluting Countries |
| 52,929 | Elements with One-Letter Symbols |
| 51,435 | Top 10 Solar Power Countries |
| 48,717 | Least-Forested Countries |
| 48,643 | Answers are Elements #2 |
| 48,224 | Answers are Elements #1 |
| 48,157 | Science Vocabulary #2 |
| 47,573 | First Names of Scientists |
| 47,149 | Countries by Carbon Dioxide Emissions per Capita |
| 46,810 | Medical Vocabulary |
| 46,609 | Least Forested European Countries |
| 46,265 | Elements that are Gases at Room Temperature |
| 46,031 | Click the Chemical Element |
| 45,617 | Countries with the Most Forest A-Z |
| 45,345 | Periodic Table Elements Mentioned in the Bible |
| 44,981 | Periodic Table Elements by Clue |
| 44,293 | Countries by Change in Carbon Dioxide Emissions |
| 43,079 | Groups of Two - Science |
| 43,007 | Science Vocabulary #3 |
| 42,995 | Name a Valid Element |
| 42,824 | Electromagnetic Spectrum |
| 42,657 | Elements by Picture |
| 42,049 | Elemental Words |
| 40,545 | Countries with Tropical Rainforest and Glaciers |
| 40,408 | Category Elimination - Elements |
| 39,870 | Click the Planet |
| 39,642 | Citrus Fruits |
| 39,419 | Countries with the Most HIV |
| 39,377 | Planets By Picture Quiz |
| 37,358 | Famous Scientists |
| 37,346 | Name the Constellations Quiz |
| 36,932 | Diseases and Medical Conditions A-Z |
| 36,395 | Most Guessed Elements on JetPunk |
| 36,240 | Word Chain - Science |
| 35,757 | Things Named For People #3 - Science |
| 35,397 | Metals by Total Mined Value |
| 35,259 | Periodic Table Symbols Quiz |
| 33,593 | Fish... or Not a Fish? |
| 31,812 | Science True or False |
| 31,640 | Countries with the Highest Percentage of Forest |
| 31,533 | Top 10 Least-Forested U.S. States |
| 31,320 | Top 10 Most-Forested U.S. States |
| 30,538 | Astronomy True or False |
| 30,514 | Planets - Multiple Choice |
| 30,390 | Animals by Skeleton Image |
| 30,229 | Diseases: Virus... or Bacteria? |
| 30,074 | Solar System Trivia |
| 29,878 | Science Multiple Choice #2 |
| 29,459 | Countries with the Most Malaria Deaths |
| 29,418 | Countries with the Most Mangroves |
| 28,728 | Bones in the Human Body |
| 28,532 | First 30 Elements Periodic Table |
| 27,786 | Most Common Body Part Words |
| 27,370 | Science Multiple Choice #3 |
| 26,243 | Astronomy Decoder |
| 26,175 | Name the Constellations - With a Map |
| 24,729 | Lightest Chemical Elements A-Z |
| 24,533 | Science Decoder |
| 23,954 | Rocks and Minerals Picture Quiz |
| 23,872 | Body Parts in History and Culture |
| 23,588 | Environmental Issues |
| 22,625 | The Sun Quiz |
| 22,626 | Name a Valid Answer - Science |
| 22,139 | Animals - Taxonomy to Common Name |
| 19,938 | U.S. States with the Most Drug Overdose Deaths |
| 19,841 | Countries that Desalinate the Most Water |
| 18,344 | Body Parts - No Vowels |
| 16,502 | Northernmost Countries Without Glaciers |
| 16,091 | U.S. States with Glaciers |
| 15,689 | 16 Questions that Prove that Physics Makes No Sense |
| 15,472 | The Mars Quiz |
| 14,461 | Brightest Objects in the Sky |
| 12,628 | Elements of the Periodic Table by Symbol |
| 12,496 | Largest Countries Without Glaciers |
| 12,353 | Recommended Childhood Vaccines for Americans |
| 12,012 | The Diseases They Had |
| 11,893 | Top 10 U.S. States by Solar Power |
| 11,261 | Albert Einstein Quiz |
| 10,010 | The Jupiter Quiz |
| 9,998 | The Voyage of Darwin - Animated Map Quiz |
| 9,366 | The Saturn Quiz |
| 9,323 | Click Every Chemical Symbol |
| 8,960 | Physics Equations |
| 8,401 | Periodic table challenge - IN ORDER! |
| 7,975 | Bones of the Human Body (with a map) |
| 7,898 | Random Element to Atomic Number |
| 7,544 | Simple Machines Quiz |
| 7,433 | Amino Acids to 1 Letter Code |
| 7,268 | Astronomy & Space |
| 7,210 | The Elements of the Periodic Table |
| 7,206 | The Pluto Quiz |
| 6,508 | Organs of the Body |
| 6,382 | Medicine and Anatomy by Letter - A |
| 6,335 | Random Elements on the Periodic Table |
| 6,071 | First 28 Countries of Wuhan Coronavirus COVID-19 Outbreak |
| 5,703 | The Venus Quiz |
| 5,531 | Moons of the Solar System |
| 5,321 | Science General Knowledge #1 |
| 4,997 | First 50 Elements |
| 4,914 | First 60 Elements |
| 4,645 | Physics General Knowledge |
| 4,434 | Name the Planets* |
| 4,433 | Scientific Groups of Things #1 |
| 4,301 | First 40 Elements |
| 4,216 | Click the Chemical Element #2 |
| 4,065 | Astronomy General Knowledge Quiz #1 |
| 3,970 | Random Constellations on a Map |
| 3,774 | Space and Astronomy General Knowledge |
| 3,694 | Human Skeleton |
| 3,526 | Seven Strong Acids Quiz |
| 3,505 | Biology Vocabulary |
| 3,428 | Medical Terms in Groups of Three |
| 3,433 | Countries That Discovered the Elements of the Periodic Table |
| 3,409 | Causes of Death on Mount Everest |
| 3,363 | Periodic Table Quiz by Borders in 60 Seconds |
| 3,294 | The 8 Planets of Solar System - Map Quiz |
| 3,226 | Elements of the Periodic Table in Alphabetical Order |
| 3,212 | Human Biology Multiple Choice Quiz #3 |
| 3,081 | Physics, Famous Physicists |
| 3,077 | Muscles of the Human Body |
| 3,048 | Random Sequential Elements on the Periodic Table |
| 3,046 | Medicine and Anatomy by Letter - B |
| 2,776 | Constellation Map |
| 2,714 | Parts of the Brain |
| 2,710 | Medicine and Anatomy by Letter - C |
| 2,694 | -Ectomy Quiz |
| 2,600 | Periodic Table of Elements - in Order |
| 2,571 | Science by Letter - A |
| 2,554 | Amino acids |
| 2,545 | Uses of Greek Letter in Science and Mathematics |
| 2,530 | Category Elimination - Elements (Expert) |
| 2,517 | Medicine and Anatomy by Letter - D |
| 2,507 | Medicine and Anatomy by Letter - F |
| 2,491 | Medical Terminology A-Z |
| 2,473 | Countries with the 50 Oldest Living People |
| 2,465 | Name Elements Containing Each Letter A-Z |
| 2,434 | Scientific Groups of Things #2 |
| 2,420 | Organic chemistry functional groups |
| 2,402 | Astronomy General Knowledge Quiz #2 |
| 2,396 | Medical prefixes and suffixes |
| 2,311 | General Knowledge Science Quiz |
| 2,296 | Anatomy of the Human Eye Map Quiz |
| 2,242 | 40 of the Most Important Scientists |
| 2,239 | A to Z: Infectious Diseases |
| 2,239 | Planets and Moons of the Solar System |
| 2,216 | First 20 elements of the Periodic table in 30 seconds |
| 2,195 | Science A-Z |
| 2,180 | Top 20 Least Forested Countries |
