| International Scientific Units | 0 | - | 4.95 | 155,087 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,050 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,218,121 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,725 |
| Famous Scientists | 0 | - | 4.57 | 42,394 |
| Elements by Symbol Quiz | 0 | - | 4.92 | 195,272 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,457 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,353 |
| Noble Gases | 0 | - | 4.89 | 77,336 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 63,969 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,764 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,749 |
| Name the Virus | 0 | - | 4.86 | 76,177 |
| Scientific Names | 0 | - | 4.32 | 78,107 |
| Famous Effects | 0 | - | 4.62 | 12,043 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 16,704 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,042 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,543 |
| Elemental Words | 0 | - | 4.96 | 51,935 |
| Metals of Antiquity | 0 | - | 4.94 | 92,825 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 60,504 |
| Bones - Sudden Death | 0 | - | 4.95 | 48,375 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 34,608 |
| Elements - Sudden Death | 0 | - | 4.91 | 125,443 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 53,556 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 85,989 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,895 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,145 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,158 |
| Body Part Cliches | 0 | - | 4.43 | 122,882 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,003 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,388 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 11,990 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,300 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,343 |
| Random Symbol to Element | 0 | - | 4.88 | 92,130 |
| Astronomy Quiz | 0 | - | 4.89 | 81,601 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,602 |
| Solar System Trivia | 0 | - | 4.93 | 45,935 |
| Environmental Issues | 0 | - | 4.54 | 26,711 |
| Click the Planet | 0 | - | 4.96 | 90,113 |
| Name a Valid Answer - Science | 0 | - | 4.78 | 39,996 |
| Body Parts in History and Culture | 0 | - | 4.42 | 34,995 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,338 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,555 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,122 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,219 |
| Word Chain - Science | 0 | - | 4.59 | 54,362 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,331 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,245 |
| Click the Chemical Element | 0 | - | 4.96 | 79,165 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,021 |
| Groups of Two - Science | 0 | - | 4.26 | 48,122 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,345 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,627 |
| Science Decoder | 0 | - | 4.52 | 28,638 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,144 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,080 |
| Science True or False | 0 | - | 4.35 | 39,937 |
| Elements by Picture | 0 | - | 4.28 | 69,497 |
| First Names of Scientists | 0 | - | 4.50 | 56,433 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,812 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,132 |
| Name a Valid Element | 0 | - | 4.64 | 69,521 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,572 |
| The Sun Quiz | 0 | - | 4.93 | 34,051 |
| Medical Acronyms | 0 | - | 4.43 | 95,728 |
| Medical Vocabulary | 0 | - | 4.54 | 58,477 |
| Citrus Fruits | 0 | - | 3.65 | 41,941 |
| The Diseases They Had | 0 | - | 4.15 | 13,879 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,617 |
| Birthstones by Month | 0 | - | 4.41 | 80,462 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,352 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,305 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,253 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,686 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,077 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,584 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,113 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,110 |
| Body Part Words | 0 | - | 4.43 | 145,086 |
| Animal Anatomy Quiz | 0 | - | 4.38 | 59,619 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,712 |
| Three Letter Body Parts | 0 | - | 4.39 | 204,785 |
| Human Body A-Z | 0 | - | 4.51 | 128,201 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,617 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,069 |
| Medical Specialties | 0 | - | 4.29 | 90,847 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,450 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,031 |
| The Pluto Quiz | 0 | - | 4.60 | 9,771 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,175 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,264 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,179 |
| Astronomy Decoder | 0 | - | 4.50 | 37,818 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,380 |
| The Mars Quiz | 0 | - | 4.54 | 18,571 |
| The Saturn Quiz | 0 | - | 4.54 | 11,494 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,470 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,028 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,626 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,353 |
| Name the Constellations | 0 | - | 4.58 | 44,630 |
| Astronomy True or False | 0 | - | 4.38 | 36,239 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,426 |
| The Venus Quiz | 0 | - | 4.19 | 6,883 |
| U.S. States with Glaciers | 0 | - | 4.61 | 24,997 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,009 |
| Elements Named for Countries | 0 | - | 4.52 | 24,353 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,627 |
| Animals by Skeleton Image | 0 | - | 4.80 | 45,932 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,343 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,296 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,827 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,753 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,523 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,096 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,203 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,450 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,758 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,674 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,054 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,339 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,566 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,383 |
| Least-Forested Countries | 0 | - | 4.53 | 64,874 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,152 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,152 |
| Most Forested European Countries | 0 | - | 4.80 | 74,870 |
| Least Forested European Countries | 0 | - | 4.25 | 53,770 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,393 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,656 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,296 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,676 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,417 |
| Countries with Glaciers | 0 | - | 4.97 | 104,604 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,058 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 16,984 |
