| Taken | Quiz |
|---|
| 1,649,424 | Elements of the Periodic Table Quiz |
| 928,686 | Planets of the Solar System Quiz |
| 189,643 | Three Letter Body Parts Quiz |
| 183,054 | Songs with Body Parts in the Title |
| 182,122 | Signs of the Zodiac Quiz |
| 154,373 | Elements by Symbol Quiz |
| 150,465 | Word Scramble - Body Parts |
| 132,355 | Periodic Table Quiz - First 20 Elements |
| 129,885 | Body Part Words Quiz |
| 125,811 | Countries with the Most Forest |
| 121,751 | Science General Knowledge #1 |
| 115,067 | Body Part Cliches |
| 113,998 | Most Common Elements in the Human Body |
| 111,773 | International Scientific Units |
| 106,518 | Medical Conditions Quiz |
| 99,194 | Human Body A-Z |
| 94,080 | Organs of the Human Body (with map) |
| 89,052 | Countries with the Highest Carbon Dioxide Emissions |
| 87,156 | Largest Objects in the Solar System |
| 85,585 | Science General Knowledge #2 |
| 83,035 | "Ologies" Quiz |
| 81,650 | Element... or Pokémon? |
| 80,675 | Medical Acronyms |
| 79,471 | Speed Symbol by Element |
| 77,690 | Medical Specialties |
| 73,502 | One-Syllable Human Body Parts |
| 72,704 | Countries with Glaciers |
| 72,521 | Science Multiple Choice #1 |
| 72,230 | Science General Knowledge #3 |
| 70,343 | Chemical Elements with Short Names |
| 65,476 | Periodic Table Elements A-Z |
| 64,245 | Tropical Rainforest Countries |
| 63,760 | Metals of Antiquity |
| 63,449 | Random Symbol to Element |
| 60,380 | Most Forested European Countries |
| 60,308 | Major Taxonomic Ranks |
| 59,616 | Science Vocabulary #1 |
| 58,988 | Scientific Names |
| 57,901 | Dumb it Down Doc |
| 57,451 | Name the Virus |
| 55,657 | Animal Anatomy Quiz |
| 55,205 | Least Forested Countries in Asia |
| 54,477 | Astronomy Quiz |
| 54,395 | Noble Gases |
| 54,030 | Top 10 Most Forested Countries in Asia |
| 53,580 | Worst Plastic Polluting Countries |
| 52,962 | Elements with One-Letter Symbols |
| 51,466 | Top 10 Solar Power Countries |
| 48,737 | Least-Forested Countries |
| 48,660 | Answers are Elements #2 |
| 48,236 | Answers are Elements #1 |
| 48,189 | Science Vocabulary #2 |
| 47,599 | First Names of Scientists |
| 47,152 | Countries by Carbon Dioxide Emissions per Capita |
| 46,840 | Medical Vocabulary |
| 46,619 | Least Forested European Countries |
| 46,291 | Elements that are Gases at Room Temperature |
| 46,094 | Click the Chemical Element |
| 45,638 | Countries with the Most Forest A-Z |
| 45,379 | Periodic Table Elements Mentioned in the Bible |
| 45,006 | Periodic Table Elements by Clue |
| 44,319 | Countries by Change in Carbon Dioxide Emissions |
| 43,103 | Groups of Two - Science |
| 43,036 | Science Vocabulary #3 |
| 43,024 | Name a Valid Element |
| 42,866 | Electromagnetic Spectrum |
| 42,678 | Elements by Picture |
| 42,077 | Elemental Words |
| 40,570 | Countries with Tropical Rainforest and Glaciers |
| 40,459 | Category Elimination - Elements |
| 39,962 | Click the Planet |
| 39,648 | Citrus Fruits |
| 39,435 | Countries with the Most HIV |
| 39,413 | Planets By Picture Quiz |
| 37,378 | Name the Constellations Quiz |
| 37,380 | Famous Scientists |
| 36,955 | Diseases and Medical Conditions A-Z |
| 36,414 | Most Guessed Elements on JetPunk |
| 36,264 | Word Chain - Science |
| 35,779 | Things Named For People #3 - Science |
| 35,429 | Metals by Total Mined Value |
| 35,366 | Periodic Table Symbols Quiz |
| 33,620 | Fish... or Not a Fish? |
| 31,831 | Science True or False |
| 31,663 | Countries with the Highest Percentage of Forest |
| 31,547 | Top 10 Least-Forested U.S. States |
| 31,329 | Top 10 Most-Forested U.S. States |
| 30,553 | Astronomy True or False |
| 30,543 | Planets - Multiple Choice |
| 30,431 | Animals by Skeleton Image |
| 30,251 | Diseases: Virus... or Bacteria? |
| 30,133 | Solar System Trivia |
| 29,894 | Science Multiple Choice #2 |
| 29,472 | Countries with the Most Malaria Deaths |
| 29,434 | Countries with the Most Mangroves |
| 28,733 | Bones in the Human Body |
| 28,541 | First 30 Elements Periodic Table |
| 27,794 | Most Common Body Part Words |
| 27,387 | Science Multiple Choice #3 |
| 26,254 | Astronomy Decoder |
| 26,194 | Name the Constellations - With a Map |
| 24,743 | Lightest Chemical Elements A-Z |
| 24,551 | Science Decoder |
| 23,973 | Rocks and Minerals Picture Quiz |
| 23,885 | Body Parts in History and Culture |
| 23,600 | Environmental Issues |
| 22,667 | The Sun Quiz |
| 22,670 | Name a Valid Answer - Science |
| 22,159 | Animals - Taxonomy to Common Name |
| 19,949 | U.S. States with the Most Drug Overdose Deaths |
| 19,862 | Countries that Desalinate the Most Water |
| 18,349 | Body Parts - No Vowels |
| 16,522 | Northernmost Countries Without Glaciers |
| 16,119 | U.S. States with Glaciers |
| 15,702 | 16 Questions that Prove that Physics Makes No Sense |
| 15,488 | The Mars Quiz |
| 14,476 | Brightest Objects in the Sky |
| 12,630 | Elements of the Periodic Table by Symbol |
| 12,521 | Largest Countries Without Glaciers |
| 12,362 | Recommended Childhood Vaccines for Americans |
| 12,013 | The Diseases They Had |
| 11,901 | Top 10 U.S. States by Solar Power |
| 11,268 | Albert Einstein Quiz |
| 10,024 | The Jupiter Quiz |
| 10,013 | The Voyage of Darwin - Animated Map Quiz |
| 9,380 | The Saturn Quiz |
| 9,359 | Click Every Chemical Symbol |
| 8,970 | Physics Equations |
| 8,406 | Periodic table challenge - IN ORDER! |
| 7,992 | Bones of the Human Body (with a map) |
| 7,898 | Random Element to Atomic Number |
| 7,548 | Simple Machines Quiz |
| 7,455 | Amino Acids to 1 Letter Code |
| 7,270 | Astronomy & Space |
| 7,221 | The Pluto Quiz |
| 7,214 | The Elements of the Periodic Table |
| 6,508 | Organs of the Body |
| 6,390 | Medicine and Anatomy by Letter - A |
| 6,351 | Random Elements on the Periodic Table |
| 6,075 | First 28 Countries of Wuhan Coronavirus COVID-19 Outbreak |
| 5,708 | The Venus Quiz |
| 5,531 | Moons of the Solar System |
| 5,324 | Science General Knowledge #1 |
| 4,998 | First 50 Elements |
| 4,936 | First 60 Elements |
| 4,652 | Physics General Knowledge |
| 4,435 | Name the Planets* |
| 4,434 | Scientific Groups of Things #1 |
| 4,301 | First 40 Elements |
| 4,222 | Click the Chemical Element #2 |
| 4,072 | Astronomy General Knowledge Quiz #1 |
| 3,973 | Random Constellations on a Map |
| 3,776 | Space and Astronomy General Knowledge |
| 3,701 | Human Skeleton |
| 3,529 | Seven Strong Acids Quiz |
| 3,509 | Biology Vocabulary |
| 3,444 | Countries That Discovered the Elements of the Periodic Table |
| 3,429 | Medical Terms in Groups of Three |
| 3,412 | Causes of Death on Mount Everest |
| 3,363 | Periodic Table Quiz by Borders in 60 Seconds |
| 3,297 | The 8 Planets of Solar System - Map Quiz |
| 3,227 | Elements of the Periodic Table in Alphabetical Order |
| 3,217 | Human Biology Multiple Choice Quiz #3 |
| 3,083 | Physics, Famous Physicists |
| 3,077 | Muscles of the Human Body |
| 3,055 | Random Sequential Elements on the Periodic Table |
| 3,049 | Medicine and Anatomy by Letter - B |
| 2,777 | Constellation Map |
| 2,724 | Parts of the Brain |
| 2,713 | Medicine and Anatomy by Letter - C |
| 2,695 | -Ectomy Quiz |
| 2,610 | Periodic Table of Elements - in Order |
| 2,572 | Science by Letter - A |
| 2,556 | Amino acids |
| 2,548 | Uses of Greek Letter in Science and Mathematics |
| 2,532 | Category Elimination - Elements (Expert) |
| 2,520 | Medicine and Anatomy by Letter - D |
| 2,509 | Medicine and Anatomy by Letter - F |
| 2,493 | Medical Terminology A-Z |
| 2,483 | Name Elements Containing Each Letter A-Z |
| 2,477 | Countries with the 50 Oldest Living People |
| 2,440 | Scientific Groups of Things #2 |
| 2,425 | Organic chemistry functional groups |
| 2,405 | Astronomy General Knowledge Quiz #2 |
| 2,396 | Medical prefixes and suffixes |
| 2,314 | General Knowledge Science Quiz |
| 2,300 | Anatomy of the Human Eye Map Quiz |
| 2,243 | 40 of the Most Important Scientists |
| 2,241 | A to Z: Infectious Diseases |
| 2,240 | Planets and Moons of the Solar System |
| 2,217 | First 20 elements of the Periodic table in 30 seconds |
| 2,198 | Science A-Z |
| 2,181 | Top 20 Least Forested Countries |
