| Taken | Quiz |
|---|
| 1,644,858 | Elements of the Periodic Table Quiz |
| 927,226 | Planets of the Solar System Quiz |
| 189,514 | Three Letter Body Parts Quiz |
| 182,807 | Songs with Body Parts in the Title |
| 181,942 | Signs of the Zodiac Quiz |
| 154,094 | Elements by Symbol Quiz |
| 150,297 | Word Scramble - Body Parts |
| 131,950 | Periodic Table Quiz - First 20 Elements |
| 129,765 | Body Part Words Quiz |
| 125,635 | Countries with the Most Forest |
| 121,452 | Science General Knowledge #1 |
| 115,018 | Body Part Cliches |
| 113,832 | Most Common Elements in the Human Body |
| 111,453 | International Scientific Units |
| 106,399 | Medical Conditions Quiz |
| 99,071 | Human Body A-Z |
| 94,000 | Organs of the Human Body (with map) |
| 88,889 | Countries with the Highest Carbon Dioxide Emissions |
| 86,749 | Largest Objects in the Solar System |
| 85,265 | Science General Knowledge #2 |
| 82,930 | "Ologies" Quiz |
| 81,225 | Element... or Pokémon? |
| 80,562 | Medical Acronyms |
| 79,332 | Speed Symbol by Element |
| 77,574 | Medical Specialties |
| 73,410 | One-Syllable Human Body Parts |
| 72,570 | Countries with Glaciers |
| 72,407 | Science Multiple Choice #1 |
| 72,048 | Science General Knowledge #3 |
| 70,219 | Chemical Elements with Short Names |
| 65,294 | Periodic Table Elements A-Z |
| 64,169 | Tropical Rainforest Countries |
| 63,626 | Metals of Antiquity |
| 63,249 | Random Symbol to Element |
| 60,264 | Most Forested European Countries |
| 60,103 | Major Taxonomic Ranks |
| 59,458 | Science Vocabulary #1 |
| 58,941 | Scientific Names |
| 57,855 | Dumb it Down Doc |
| 57,372 | Name the Virus |
| 55,624 | Animal Anatomy Quiz |
| 55,113 | Least Forested Countries in Asia |
| 54,293 | Astronomy Quiz |
| 54,281 | Noble Gases |
| 53,924 | Top 10 Most Forested Countries in Asia |
| 53,364 | Worst Plastic Polluting Countries |
| 52,849 | Elements with One-Letter Symbols |
| 51,367 | Top 10 Solar Power Countries |
| 48,668 | Least-Forested Countries |
| 48,586 | Answers are Elements #2 |
| 48,181 | Answers are Elements #1 |
| 48,078 | Science Vocabulary #2 |
| 47,522 | First Names of Scientists |
| 47,132 | Countries by Carbon Dioxide Emissions per Capita |
| 46,740 | Medical Vocabulary |
| 46,576 | Least Forested European Countries |
| 46,211 | Elements that are Gases at Room Temperature |
| 45,787 | Click the Chemical Element |
| 45,558 | Countries with the Most Forest A-Z |
| 45,289 | Periodic Table Elements Mentioned in the Bible |
| 44,936 | Periodic Table Elements by Clue |
| 44,227 | Countries by Change in Carbon Dioxide Emissions |
| 43,041 | Groups of Two - Science |
| 42,950 | Science Vocabulary #3 |
| 42,904 | Name a Valid Element |
| 42,743 | Electromagnetic Spectrum |
| 42,613 | Elements by Picture |
| 41,971 | Elemental Words |
| 40,491 | Countries with Tropical Rainforest and Glaciers |
| 40,316 | Category Elimination - Elements |
| 39,674 | Click the Planet |
| 39,631 | Citrus Fruits |
| 39,370 | Countries with the Most HIV |
| 39,273 | Planets By Picture Quiz |
| 37,312 | Famous Scientists |
| 37,297 | Name the Constellations Quiz |
| 36,877 | Diseases and Medical Conditions A-Z |
| 36,346 | Most Guessed Elements on JetPunk |
| 36,164 | Word Chain - Science |
| 35,664 | Things Named For People #3 - Science |
| 35,315 | Metals by Total Mined Value |
| 35,010 | Periodic Table Symbols Quiz |
| 33,547 | Fish... or Not a Fish? |
| 31,774 | Science True or False |
| 31,584 | Countries with the Highest Percentage of Forest |
| 31,492 | Top 10 Least-Forested U.S. States |
| 31,303 | Top 10 Most-Forested U.S. States |
| 30,497 | Astronomy True or False |
| 30,426 | Planets - Multiple Choice |
| 30,285 | Animals by Skeleton Image |
| 30,161 | Diseases: Virus... or Bacteria? |
| 29,896 | Solar System Trivia |
| 29,846 | Science Multiple Choice #2 |
| 29,428 | Countries with the Most Malaria Deaths |
| 29,372 | Countries with the Most Mangroves |
| 28,707 | Bones in the Human Body |
| 28,481 | First 30 Elements Periodic Table |
| 27,772 | Most Common Body Part Words |
| 27,334 | Science Multiple Choice #3 |
| 26,194 | Astronomy Decoder |
| 26,133 | Name the Constellations - With a Map |
| 24,691 | Lightest Chemical Elements A-Z |
| 24,442 | Science Decoder |
| 23,913 | Rocks and Minerals Picture Quiz |
| 23,846 | Body Parts in History and Culture |
| 23,553 | Environmental Issues |
| 22,561 | The Sun Quiz |
| 22,502 | Name a Valid Answer - Science |
| 22,088 | Animals - Taxonomy to Common Name |
| 19,917 | U.S. States with the Most Drug Overdose Deaths |
| 19,789 | Countries that Desalinate the Most Water |
| 18,318 | Body Parts - No Vowels |
| 16,460 | Northernmost Countries Without Glaciers |
| 16,047 | U.S. States with Glaciers |
| 15,660 | 16 Questions that Prove that Physics Makes No Sense |
| 15,438 | The Mars Quiz |
| 14,427 | Brightest Objects in the Sky |
| 12,618 | Elements of the Periodic Table by Symbol |
| 12,437 | Largest Countries Without Glaciers |
| 12,325 | Recommended Childhood Vaccines for Americans |
| 12,005 | The Diseases They Had |
| 11,878 | Top 10 U.S. States by Solar Power |
| 11,225 | Albert Einstein Quiz |
| 9,990 | The Jupiter Quiz |
| 9,954 | The Voyage of Darwin - Animated Map Quiz |
| 9,342 | The Saturn Quiz |
| 8,939 | Physics Equations |
| 8,939 | Click Every Chemical Symbol |
| 8,385 | Periodic table challenge - IN ORDER! |
| 7,949 | Bones of the Human Body (with a map) |
| 7,896 | Random Element to Atomic Number |
| 7,528 | Simple Machines Quiz |
| 7,422 | Amino Acids to 1 Letter Code |
| 7,259 | Astronomy & Space |
| 7,205 | The Elements of the Periodic Table |
| 7,177 | The Pluto Quiz |
| 6,504 | Organs of the Body |
| 6,359 | Medicine and Anatomy by Letter - A |
| 6,291 | Random Elements on the Periodic Table |
| 6,068 | First 28 Countries of Wuhan Coronavirus COVID-19 Outbreak |
| 5,693 | The Venus Quiz |
| 5,519 | Moons of the Solar System |
| 5,309 | Science General Knowledge #1 |
| 4,926 | First 50 Elements |
| 4,887 | First 60 Elements |
| 4,633 | Physics General Knowledge |
| 4,432 | Name the Planets* |
| 4,426 | Scientific Groups of Things #1 |
| 4,287 | First 40 Elements |
| 4,203 | Click the Chemical Element #2 |
| 4,057 | Astronomy General Knowledge Quiz #1 |
| 3,956 | Random Constellations on a Map |
| 3,766 | Space and Astronomy General Knowledge |
| 3,674 | Human Skeleton |
| 3,515 | Seven Strong Acids Quiz |
| 3,498 | Biology Vocabulary |
| 3,427 | Medical Terms in Groups of Three |
| 3,402 | Causes of Death on Mount Everest |
| 3,358 | Periodic Table Quiz by Borders in 60 Seconds |
| 3,285 | The 8 Planets of Solar System - Map Quiz |
| 3,224 | Elements of the Periodic Table in Alphabetical Order |
| 3,210 | Countries That Discovered the Elements of the Periodic Table |
| 3,199 | Human Biology Multiple Choice Quiz #3 |
| 3,074 | Physics, Famous Physicists |
| 3,071 | Muscles of the Human Body |
| 3,036 | Random Sequential Elements on the Periodic Table |
| 3,032 | Medicine and Anatomy by Letter - B |
| 2,769 | Constellation Map |
| 2,709 | Parts of the Brain |
| 2,693 | -Ectomy Quiz |
| 2,694 | Medicine and Anatomy by Letter - C |
| 2,575 | Periodic Table of Elements - in Order |
| 2,563 | Science by Letter - A |
| 2,543 | Uses of Greek Letter in Science and Mathematics |
| 2,551 | Amino acids |
| 2,527 | Category Elimination - Elements (Expert) |
| 2,499 | Medicine and Anatomy by Letter - D |
| 2,496 | Medicine and Anatomy by Letter - F |
| 2,483 | Medical Terminology A-Z |
| 2,466 | Countries with the 50 Oldest Living People |
| 2,452 | Name Elements Containing Each Letter A-Z |
| 2,427 | Scientific Groups of Things #2 |
| 2,416 | Organic chemistry functional groups |
| 2,395 | Astronomy General Knowledge Quiz #2 |
| 2,393 | Medical prefixes and suffixes |
| 2,303 | General Knowledge Science Quiz |
| 2,283 | Anatomy of the Human Eye Map Quiz |
| 2,241 | 40 of the Most Important Scientists |
| 2,237 | A to Z: Infectious Diseases |
| 2,238 | Planets and Moons of the Solar System |
| 2,213 | First 20 elements of the Periodic table in 30 seconds |
| 2,185 | Science A-Z |
| 2,177 | Top 20 Least Forested Countries |
