| Taken | Quiz |
|---|
| 1,642,710 | Elements of the Periodic Table Quiz |
| 926,478 | Planets of the Solar System Quiz |
| 189,409 | Three Letter Body Parts Quiz |
| 182,653 | Songs with Body Parts in the Title |
| 181,845 | Signs of the Zodiac Quiz |
| 153,924 | Elements by Symbol Quiz |
| 150,218 | Word Scramble - Body Parts |
| 131,709 | Periodic Table Quiz - First 20 Elements |
| 129,690 | Body Part Words Quiz |
| 125,547 | Countries with the Most Forest |
| 121,307 | Science General Knowledge #1 |
| 114,594 | Body Part Cliches |
| 113,721 | Most Common Elements in the Human Body |
| 111,272 | International Scientific Units |
| 106,311 | Medical Conditions Quiz |
| 98,985 | Human Body A-Z |
| 93,949 | Organs of the Human Body (with map) |
| 88,796 | Countries with the Highest Carbon Dioxide Emissions |
| 86,539 | Largest Objects in the Solar System |
| 85,162 | Science General Knowledge #2 |
| 82,872 | "Ologies" Quiz |
| 80,991 | Element... or Pokémon? |
| 80,504 | Medical Acronyms |
| 79,270 | Speed Symbol by Element |
| 77,534 | Medical Specialties |
| 73,356 | One-Syllable Human Body Parts |
| 72,505 | Countries with Glaciers |
| 72,347 | Science Multiple Choice #1 |
| 71,980 | Science General Knowledge #3 |
| 70,155 | Chemical Elements with Short Names |
| 65,207 | Periodic Table Elements A-Z |
| 64,137 | Tropical Rainforest Countries |
| 63,566 | Metals of Antiquity |
| 63,146 | Random Symbol to Element |
| 60,201 | Most Forested European Countries |
| 60,012 | Major Taxonomic Ranks |
| 59,409 | Science Vocabulary #1 |
| 58,912 | Scientific Names |
| 57,826 | Dumb it Down Doc |
| 57,325 | Name the Virus |
| 55,593 | Animal Anatomy Quiz |
| 55,067 | Least Forested Countries in Asia |
| 54,209 | Noble Gases |
| 54,213 | Astronomy Quiz |
| 53,872 | Top 10 Most Forested Countries in Asia |
| 53,228 | Worst Plastic Polluting Countries |
| 52,777 | Elements with One-Letter Symbols |
| 51,315 | Top 10 Solar Power Countries |
| 48,634 | Least-Forested Countries |
| 48,547 | Answers are Elements #2 |
| 48,144 | Answers are Elements #1 |
| 48,035 | Science Vocabulary #2 |
| 47,473 | First Names of Scientists |
| 47,120 | Countries by Carbon Dioxide Emissions per Capita |
| 46,681 | Medical Vocabulary |
| 46,556 | Least Forested European Countries |
| 46,168 | Elements that are Gases at Room Temperature |
| 45,612 | Click the Chemical Element |
| 45,506 | Countries with the Most Forest A-Z |
| 45,201 | Periodic Table Elements Mentioned in the Bible |
| 44,881 | Periodic Table Elements by Clue |
| 44,195 | Countries by Change in Carbon Dioxide Emissions |
| 43,003 | Groups of Two - Science |
| 42,910 | Science Vocabulary #3 |
| 42,859 | Name a Valid Element |
| 42,690 | Electromagnetic Spectrum |
| 42,556 | Elements by Picture |
| 41,899 | Elemental Words |
| 40,452 | Countries with Tropical Rainforest and Glaciers |
| 40,244 | Category Elimination - Elements |
| 39,626 | Citrus Fruits |
| 39,552 | Click the Planet |
| 39,336 | Countries with the Most HIV |
| 39,191 | Planets By Picture Quiz |
| 37,272 | Name the Constellations Quiz |
| 37,277 | Famous Scientists |
| 36,830 | Diseases and Medical Conditions A-Z |
| 36,312 | Most Guessed Elements on JetPunk |
| 36,109 | Word Chain - Science |
| 35,616 | Things Named For People #3 - Science |
| 35,271 | Metals by Total Mined Value |
| 34,849 | Periodic Table Symbols Quiz |
| 33,493 | Fish... or Not a Fish? |
| 31,743 | Science True or False |
| 31,531 | Countries with the Highest Percentage of Forest |
| 31,464 | Top 10 Least-Forested U.S. States |
| 31,278 | Top 10 Most-Forested U.S. States |
| 30,472 | Astronomy True or False |
| 30,360 | Planets - Multiple Choice |
| 30,206 | Animals by Skeleton Image |
| 30,119 | Diseases: Virus... or Bacteria? |
| 29,816 | Science Multiple Choice #2 |
| 29,741 | Solar System Trivia |
| 29,403 | Countries with the Most Malaria Deaths |
| 29,345 | Countries with the Most Mangroves |
| 28,689 | Bones in the Human Body |
| 28,408 | First 30 Elements Periodic Table |
| 27,753 | Most Common Body Part Words |
| 27,310 | Science Multiple Choice #3 |
| 26,164 | Astronomy Decoder |
| 26,094 | Name the Constellations - With a Map |
| 24,660 | Lightest Chemical Elements A-Z |
| 24,415 | Science Decoder |
| 23,886 | Rocks and Minerals Picture Quiz |
| 23,821 | Body Parts in History and Culture |
| 23,532 | Environmental Issues |
| 22,502 | The Sun Quiz |
| 22,413 | Name a Valid Answer - Science |
| 22,036 | Animals - Taxonomy to Common Name |
| 19,897 | U.S. States with the Most Drug Overdose Deaths |
| 19,749 | Countries that Desalinate the Most Water |
| 18,303 | Body Parts - No Vowels |
| 16,425 | Northernmost Countries Without Glaciers |
| 16,006 | U.S. States with Glaciers |
| 15,640 | 16 Questions that Prove that Physics Makes No Sense |
| 15,406 | The Mars Quiz |
| 14,408 | Brightest Objects in the Sky |
| 12,599 | Elements of the Periodic Table by Symbol |
| 12,383 | Largest Countries Without Glaciers |
| 12,308 | Recommended Childhood Vaccines for Americans |
| 11,993 | The Diseases They Had |
| 11,865 | Top 10 U.S. States by Solar Power |
| 11,201 | Albert Einstein Quiz |
| 9,965 | The Jupiter Quiz |
| 9,930 | The Voyage of Darwin - Animated Map Quiz |
| 9,322 | The Saturn Quiz |
| 8,927 | Physics Equations |
| 8,900 | Click Every Chemical Symbol |
| 8,384 | Periodic table challenge - IN ORDER! |
| 7,927 | Bones of the Human Body (with a map) |
| 7,895 | Random Element to Atomic Number |
| 7,513 | Simple Machines Quiz |
| 7,417 | Amino Acids to 1 Letter Code |
| 7,251 | Astronomy & Space |
| 7,200 | The Elements of the Periodic Table |
| 7,158 | The Pluto Quiz |
| 6,501 | Organs of the Body |
| 6,339 | Medicine and Anatomy by Letter - A |
| 6,265 | Random Elements on the Periodic Table |
| 6,067 | First 28 Countries of Wuhan Coronavirus COVID-19 Outbreak |
| 5,687 | The Venus Quiz |
| 5,510 | Moons of the Solar System |
| 5,307 | Science General Knowledge #1 |
| 4,918 | First 50 Elements |
| 4,884 | First 60 Elements |
| 4,625 | Physics General Knowledge |
| 4,430 | Name the Planets* |
| 4,422 | Scientific Groups of Things #1 |
| 4,271 | First 40 Elements |
| 4,195 | Click the Chemical Element #2 |
| 4,054 | Astronomy General Knowledge Quiz #1 |
| 3,954 | Random Constellations on a Map |
| 3,764 | Space and Astronomy General Knowledge |
| 3,670 | Human Skeleton |
| 3,514 | Seven Strong Acids Quiz |
| 3,490 | Biology Vocabulary |
| 3,427 | Medical Terms in Groups of Three |
| 3,397 | Causes of Death on Mount Everest |
| 3,356 | Periodic Table Quiz by Borders in 60 Seconds |
| 3,284 | The 8 Planets of Solar System - Map Quiz |
| 3,223 | Elements of the Periodic Table in Alphabetical Order |
| 3,203 | Countries That Discovered the Elements of the Periodic Table |
| 3,196 | Human Biology Multiple Choice Quiz #3 |
| 3,070 | Physics, Famous Physicists |
| 3,069 | Muscles of the Human Body |
| 3,028 | Random Sequential Elements on the Periodic Table |
| 3,012 | Medicine and Anatomy by Letter - B |
| 2,765 | Constellation Map |
| 2,706 | Parts of the Brain |
| 2,691 | -Ectomy Quiz |
| 2,676 | Medicine and Anatomy by Letter - C |
| 2,560 | Science by Letter - A |
| 2,543 | Amino acids |
| 2,537 | Uses of Greek Letter in Science and Mathematics |
| 2,539 | Periodic Table of Elements - in Order |
| 2,525 | Category Elimination - Elements (Expert) |
| 2,481 | Medical Terminology A-Z |
| 2,479 | Medicine and Anatomy by Letter - D |
| 2,474 | Medicine and Anatomy by Letter - F |
| 2,461 | Countries with the 50 Oldest Living People |
| 2,441 | Name Elements Containing Each Letter A-Z |
| 2,423 | Scientific Groups of Things #2 |
| 2,406 | Organic chemistry functional groups |
| 2,392 | Medical prefixes and suffixes |
| 2,394 | Astronomy General Knowledge Quiz #2 |
| 2,300 | General Knowledge Science Quiz |
| 2,265 | Anatomy of the Human Eye Map Quiz |
| 2,240 | 40 of the Most Important Scientists |
| 2,234 | A to Z: Infectious Diseases |
| 2,231 | Planets and Moons of the Solar System |
| 2,211 | First 20 elements of the Periodic table in 30 seconds |
| 2,183 | Science A-Z |
| 2,176 | Top 20 Least Forested Countries |
