| International Scientific Units | 0 | - | 4.95 | 156,907 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,786 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,243,714 |
| Major Taxonomic Ranks | 0 | - | 4.56 | 80,593 |
| Famous Scientists | 0 | - | 4.57 | 42,655 |
| Elements by Symbol | 0 | - | 4.92 | 197,302 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,721 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,242 |
| Noble Gases | 0 | - | 4.89 | 78,199 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,607 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,317 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,698 |
| Name the Virus | 0 | - | 4.87 | 76,774 |
| Scientific Names | 0 | - | 4.32 | 78,475 |
| Famous Effects | 0 | - | 4.62 | 12,522 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 17,869 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,116 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,996 |
| Elemental Words | 0 | - | 4.96 | 52,299 |
| Metals of Antiquity | 0 | - | 4.95 | 93,446 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 63,329 |
| Bones - Sudden Death | 0 | - | 4.95 | 50,758 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 36,451 |
| Elements - Sudden Death | 0 | - | 4.91 | 131,322 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 55,634 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,577 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,012 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,804 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,530 |
| Body Part Cliches | 0 | - | 4.43 | 123,313 |
| Bones of the Human Body | 0 | - | 4.52 | 42,487 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,188 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,556 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.53 | 12,189 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,591 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,626 |
| Random Symbol to Element | 0 | - | 4.88 | 93,111 |
| Astronomy Quiz | 0 | - | 4.90 | 82,631 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,311 |
| Solar System Trivia | 0 | - | 4.93 | 46,676 |
| Environmental Issues | 0 | - | 4.54 | 26,837 |
| Click the Planet | 0 | - | 4.96 | 91,453 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,969 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,285 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,061 |
| Science General Knowledge #2 | 0 | - | 4.48 | 118,862 |
| Science General Knowledge #3 | 0 | - | 4.56 | 108,778 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,665 |
| Word Chain - Science | 0 | - | 4.59 | 54,906 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,714 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,866 |
| Click the Chemical Element | 0 | - | 4.96 | 80,508 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,097,702 |
| Groups of Two - Science | 0 | - | 4.26 | 48,334 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,863 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,008 |
| Science Decoder | 0 | - | 4.52 | 28,776 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,332 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,291 |
| Science True or False | 0 | - | 4.35 | 40,319 |
| Elements by Picture | 0 | - | 4.27 | 69,973 |
| First Names of Scientists | 0 | - | 4.51 | 56,897 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,035 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,932 |
| Name a Valid Element | 0 | - | 4.64 | 70,063 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,951 |
| The Sun Quiz | 0 | - | 4.93 | 34,699 |
| Medical Acronyms | 0 | - | 4.43 | 96,860 |
| Medical Vocabulary | 0 | - | 4.54 | 59,118 |
| Citrus Fruits | 0 | - | 3.63 | 42,074 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,660 |
| The Diseases They Had | 0 | - | 4.15 | 14,015 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,819 |
| Birthstones by Month | 0 | - | 4.42 | 80,703 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,166 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,393 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,758 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,833 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,200 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,340 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,865 |
| Body Part Words | 0 | - | 4.43 | 145,971 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,825 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,356 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,599 |
| Human Body A-Z | 0 | - | 4.51 | 129,188 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,187 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,291 |
| Medical Specialties | 0 | - | 4.32 | 91,783 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.69 | 57,801 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,795 |
| The Pluto Quiz | 0 | - | 4.61 | 9,858 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,506 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,718 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,706 |
| Astronomy Decoder | 0 | - | 4.49 | 38,064 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,462 |
| The Mars Quiz | 0 | - | 4.55 | 18,667 |
| The Saturn Quiz | 0 | - | 4.54 | 11,557 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,584 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,360 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,980 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 225,857 |
| Name the Constellations | 0 | - | 4.58 | 44,992 |
| Astronomy True or False | 0 | - | 4.39 | 36,482 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,758 |
| The Venus Quiz | 0 | - | 4.21 | 6,928 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,310 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,405 |
| Elements Named for Countries | 0 | - | 4.53 | 24,717 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,720 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,516 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,486 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,453 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,303 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,410 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,723 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,155 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,663 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,633 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,996 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,825 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,548 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,675 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,569 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,641 |
| Least-Forested Countries | 0 | - | 4.53 | 65,214 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,449 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,499 |
| Most Forested European Countries | 0 | - | 4.80 | 75,346 |
| Least Forested European Countries | 0 | - | 4.25 | 54,025 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,721 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,824 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,521 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,092 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,653 |
| Countries with Glaciers | 0 | - | 4.97 | 105,437 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,149 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,265 |
