| International Scientific Units | 0 | - | 4.95 | 155,190 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,114 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,393 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,218,735 |
| Elements by Symbol | 0 | - | 4.92 | 195,358 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,529 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,393 |
| Noble Gases | 0 | - | 4.89 | 77,384 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,002 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,818 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,803 |
| Name the Virus | 0 | - | 4.86 | 76,195 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,150 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,754 |
| Famous Scientists | 0 | - | 4.57 | 42,418 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 16,746 |
| Scientific Names | 0 | - | 4.32 | 78,124 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,556 |
| Elemental Words | 0 | - | 4.96 | 51,949 |
| Metals of Antiquity | 0 | - | 4.94 | 92,852 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 60,739 |
| Bones - Sudden Death | 0 | - | 4.95 | 48,611 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 34,692 |
| Elements - Sudden Death | 0 | - | 4.91 | 125,609 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 53,635 |
| Famous Effects | 0 | - | 4.62 | 12,063 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,008 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,895 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,188 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,169 |
| Body Part Cliches | 0 | - | 4.43 | 122,959 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,043 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,051 |
| Random Symbol to Element | 0 | - | 4.88 | 92,154 |
| Astronomy Quiz | 0 | - | 4.89 | 81,628 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,653 |
| Solar System Trivia | 0 | - | 4.93 | 45,970 |
| Click the Planet | 0 | - | 4.96 | 90,146 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 11,999 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,317 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,349 |
| Environmental Issues | 0 | - | 4.54 | 26,715 |
| Name a Valid Answer - Science | 0 | - | 4.78 | 40,022 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,043 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,368 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,576 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,138 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,228 |
| Word Chain - Science | 0 | - | 4.59 | 54,374 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,339 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,445 |
| Click the Chemical Element | 0 | - | 4.96 | 79,202 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,254 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,608 |
| The Sun Quiz | 0 | - | 4.93 | 34,070 |
| First Names of Scientists | 0 | - | 4.50 | 56,440 |
| Groups of Two - Science | 0 | - | 4.26 | 48,126 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,351 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,638 |
| Science Decoder | 0 | - | 4.52 | 28,641 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,089 |
| Science True or False | 0 | - | 4.35 | 39,950 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,817 |
| Elements by Picture | 0 | - | 4.28 | 69,517 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,156 |
| Name a Valid Element | 0 | - | 4.64 | 69,541 |
| Medical Acronyms | 0 | - | 4.43 | 95,985 |
| Medical Vocabulary | 0 | - | 4.54 | 58,489 |
| Birthstones by Month | 0 | - | 4.41 | 80,465 |
| Citrus Fruits | 0 | - | 3.65 | 41,943 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,361 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,307 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,261 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,691 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,083 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,081 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,651 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,133 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,120 |
| Body Part Words | 0 | - | 4.43 | 145,149 |
| Animal Anatomy Quiz | 0 | - | 4.38 | 59,635 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,750 |
| Three Letter Body Parts | 0 | - | 4.39 | 204,843 |
| Human Body A-Z | 0 | - | 4.51 | 128,272 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,668 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,213 |
| Medical Specialties | 0 | - | 4.29 | 90,866 |
| The Diseases They Had | 0 | - | 4.15 | 13,881 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,463 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,620 |
| The Pluto Quiz | 0 | - | 4.60 | 9,773 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,187 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,280 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,199 |
| Astronomy Decoder | 0 | - | 4.50 | 37,828 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,384 |
| The Mars Quiz | 0 | - | 4.54 | 18,572 |
| The Saturn Quiz | 0 | - | 4.54 | 11,496 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,643 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,418 |
| Name the Constellations | 0 | - | 4.58 | 44,638 |
| Astronomy True or False | 0 | - | 4.38 | 36,249 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,484 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,491 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,056 |
| The Venus Quiz | 0 | - | 4.19 | 6,885 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,008 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,020 |
| Elements Named for Countries | 0 | - | 4.52 | 24,365 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,628 |
| Animals by Skeleton Image | 0 | - | 4.80 | 45,944 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,345 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,301 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,837 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,754 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,529 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,097 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,217 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,451 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,765 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,675 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,065 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,346 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,592 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,393 |
| Least-Forested Countries | 0 | - | 4.53 | 64,879 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,160 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,162 |
| Most Forested European Countries | 0 | - | 4.80 | 74,886 |
| Least Forested European Countries | 0 | - | 4.25 | 53,774 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,401 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,668 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,300 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,688 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,423 |
| Countries with Glaciers | 0 | - | 4.97 | 104,624 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,061 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 16,994 |
