| International Scientific Units | 0 | - | 4.95 | 156,626 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,712 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,239,121 |
| Major Taxonomic Ranks | 0 | - | 4.56 | 80,441 |
| Famous Scientists | 0 | - | 4.57 | 42,617 |
| Elements by Symbol | 0 | - | 4.92 | 197,004 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,551 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,155 |
| Noble Gases | 0 | - | 4.89 | 78,085 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,509 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,026 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,568 |
| Name the Virus | 0 | - | 4.87 | 76,695 |
| Scientific Names | 0 | - | 4.32 | 78,407 |
| Famous Effects | 0 | - | 4.62 | 12,448 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 17,682 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,110 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,918 |
| Elemental Words | 0 | - | 4.96 | 52,243 |
| Metals of Antiquity | 0 | - | 4.95 | 93,371 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 62,973 |
| Bones - Sudden Death | 0 | - | 4.95 | 50,451 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 36,191 |
| Elements - Sudden Death | 0 | - | 4.91 | 130,303 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 55,282 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,490 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,990 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,574 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,457 |
| Body Part Cliches | 0 | - | 4.43 | 123,272 |
| Bones of the Human Body | 0 | - | 4.52 | 42,212 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,102 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,528 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,144 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,532 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,576 |
| Random Symbol to Element | 0 | - | 4.88 | 92,975 |
| Astronomy Quiz | 0 | - | 4.90 | 82,470 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,035 |
| Solar System Trivia | 0 | - | 4.93 | 46,549 |
| Environmental Issues | 0 | - | 4.54 | 26,820 |
| Click the Planet | 0 | - | 4.96 | 91,191 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,847 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,261 |
| Science General Knowledge #1 | 0 | - | 4.54 | 165,780 |
| Science General Knowledge #2 | 0 | - | 4.48 | 118,646 |
| Science General Knowledge #3 | 0 | - | 4.56 | 108,288 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,591 |
| Word Chain - Science | 0 | - | 4.59 | 54,844 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,669 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,740 |
| Click the Chemical Element | 0 | - | 4.96 | 80,243 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,096,403 |
| Groups of Two - Science | 0 | - | 4.26 | 48,291 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,766 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,932 |
| Science Decoder | 0 | - | 4.52 | 28,753 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,296 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,253 |
| Science True or False | 0 | - | 4.35 | 40,265 |
| Elements by Picture | 0 | - | 4.27 | 69,883 |
| First Names of Scientists | 0 | - | 4.50 | 56,760 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,993 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,807 |
| Name a Valid Element | 0 | - | 4.64 | 69,973 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,886 |
| The Sun Quiz | 0 | - | 4.93 | 34,590 |
| Medical Acronyms | 0 | - | 4.43 | 96,775 |
| Medical Vocabulary | 0 | - | 4.54 | 59,052 |
| Citrus Fruits | 0 | - | 3.63 | 42,062 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,632 |
| The Diseases They Had | 0 | - | 4.15 | 13,996 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,773 |
| Birthstones by Month | 0 | - | 4.42 | 80,638 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,638 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,375 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,687 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,811 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,186 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 28,234 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,727 |
| Body Part Words | 0 | - | 4.43 | 145,899 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,800 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,263 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,539 |
| Human Body A-Z | 0 | - | 4.51 | 129,103 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,109 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,165 |
| Medical Specialties | 0 | - | 4.32 | 91,716 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.69 | 57,643 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,523 |
| The Pluto Quiz | 0 | - | 4.61 | 9,833 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,444 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,644 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,624 |
| Astronomy Decoder | 0 | - | 4.49 | 38,022 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,447 |
| The Mars Quiz | 0 | - | 4.55 | 18,644 |
| The Saturn Quiz | 0 | - | 4.54 | 11,547 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,528 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,301 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,944 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 225,430 |
| Name the Constellations | 0 | - | 4.58 | 44,926 |
| Astronomy True or False | 0 | - | 4.39 | 36,431 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,603 |
| The Venus Quiz | 0 | - | 4.21 | 6,916 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,250 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,367 |
| Elements Named for Countries | 0 | - | 4.52 | 24,661 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,700 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,408 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,461 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,425 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,227 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,232 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,697 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,146 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,594 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,600 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,962 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,799 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,444 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,619 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,476 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,619 |
| Least-Forested Countries | 0 | - | 4.53 | 65,166 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,399 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,439 |
| Most Forested European Countries | 0 | - | 4.80 | 75,268 |
| Least Forested European Countries | 0 | - | 4.25 | 53,987 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,667 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,790 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,489 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,016 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,618 |
| Countries with Glaciers | 0 | - | 4.97 | 105,360 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,141 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,227 |
