| International Scientific Units | 0 | - | 4.95 | 156,033 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,480 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,231,088 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,175 |
| Famous Scientists | 0 | - | 4.57 | 42,540 |
| Elements by Symbol | 0 | - | 4.92 | 196,331 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,157 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,732 |
| Noble Gases | 0 | - | 4.89 | 77,791 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,308 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,561 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,239 |
| Name the Virus | 0 | - | 4.86 | 76,538 |
| Scientific Names | 0 | - | 4.32 | 78,290 |
| Famous Effects | 0 | - | 4.62 | 12,299 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 17,303 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,094 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,768 |
| Elemental Words | 0 | - | 4.96 | 52,136 |
| Metals of Antiquity | 0 | - | 4.94 | 93,146 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 62,174 |
| Bones - Sudden Death | 0 | - | 4.95 | 49,843 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 35,574 |
| Elements - Sudden Death | 0 | - | 4.91 | 128,406 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 54,610 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,269 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,954 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 187,952 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,353 |
| Body Part Cliches | 0 | - | 4.43 | 123,191 |
| Bones of the Human Body | 0 | - | 4.52 | 41,607 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,849 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,479 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,089 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,427 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,489 |
| Random Symbol to Element | 0 | - | 4.88 | 92,532 |
| Astronomy Quiz | 0 | - | 4.90 | 82,132 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,442 |
| Solar System Trivia | 0 | - | 4.93 | 46,341 |
| Environmental Issues | 0 | - | 4.54 | 26,775 |
| Click the Planet | 0 | - | 4.96 | 90,767 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,402 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,211 |
| Science General Knowledge #1 | 0 | - | 4.54 | 164,157 |
| Science General Knowledge #2 | 0 | - | 4.48 | 117,242 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,730 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,424 |
| Word Chain - Science | 0 | - | 4.59 | 54,621 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,560 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,168 |
| Click the Chemical Element | 0 | - | 4.96 | 79,807 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,093,904 |
| Groups of Two - Science | 0 | - | 4.26 | 48,212 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,576 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,781 |
| Science Decoder | 0 | - | 4.52 | 28,688 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,232 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,191 |
| Science True or False | 0 | - | 4.35 | 40,140 |
| Elements by Picture | 0 | - | 4.27 | 69,741 |
| First Names of Scientists | 0 | - | 4.50 | 56,651 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,907 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,522 |
| Name a Valid Element | 0 | - | 4.64 | 69,784 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,792 |
| The Sun Quiz | 0 | - | 4.93 | 34,346 |
| Medical Acronyms | 0 | - | 4.43 | 96,556 |
| Medical Vocabulary | 0 | - | 4.54 | 58,888 |
| Citrus Fruits | 0 | - | 3.63 | 41,997 |
| The Diseases They Had | 0 | - | 4.15 | 13,963 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,714 |
| Birthstones by Month | 0 | - | 4.41 | 80,562 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,518 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,341 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,505 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,758 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,149 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 28,053 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,478 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,357 |
| Body Part Words | 0 | - | 4.43 | 145,747 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,741 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,066 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,439 |
| Human Body A-Z | 0 | - | 4.51 | 128,882 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,949 |
| Organs of the Human Body (with map) | 0 | - | 4.11 | 118,878 |
| Medical Specialties | 0 | - | 4.32 | 91,206 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 57,293 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,949 |
| The Pluto Quiz | 0 | - | 4.61 | 9,808 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,341 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,510 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,442 |
| Astronomy Decoder | 0 | - | 4.50 | 37,936 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,422 |
| The Mars Quiz | 0 | - | 4.55 | 18,612 |
| The Saturn Quiz | 0 | - | 4.54 | 11,530 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,588 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,199 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,861 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 224,696 |
| Name the Constellations | 0 | - | 4.58 | 44,851 |
| Astronomy True or False | 0 | - | 4.39 | 36,354 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,300 |
| The Venus Quiz | 0 | - | 4.21 | 6,902 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,148 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,215 |
| Elements Named for Countries | 0 | - | 4.52 | 24,548 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,680 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,198 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,413 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,385 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,077 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 25,074 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,617 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,136 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,410 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,540 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,883 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,738 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,290 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,476 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,888 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,539 |
| Least-Forested Countries | 0 | - | 4.53 | 65,040 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,302 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,333 |
| Most Forested European Countries | 0 | - | 4.80 | 75,112 |
| Least Forested European Countries | 0 | - | 4.25 | 53,887 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,566 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,738 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,414 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,878 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,529 |
| Countries with Glaciers | 0 | - | 4.97 | 104,859 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,105 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,132 |
