| International Scientific Units | 0 | - | 4.95 | 155,439 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,273 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,221,648 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,866 |
| Famous Scientists | 0 | - | 4.57 | 42,471 |
| Elements by Symbol | 0 | - | 4.92 | 195,622 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,694 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,498 |
| Noble Gases | 0 | - | 4.89 | 77,497 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,086 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,998 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,935 |
| Name the Virus | 0 | - | 4.86 | 76,281 |
| Scientific Names | 0 | - | 4.32 | 78,184 |
| Famous Effects | 0 | - | 4.62 | 12,142 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 16,905 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,069 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,615 |
| Elemental Words | 0 | - | 4.96 | 52,009 |
| Metals of Antiquity | 0 | - | 4.94 | 92,941 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 61,264 |
| Bones - Sudden Death | 0 | - | 4.95 | 49,114 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 34,909 |
| Elements - Sudden Death | 0 | - | 4.91 | 126,240 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 53,858 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,072 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,916 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,414 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,219 |
| Body Part Cliches | 0 | - | 4.43 | 123,086 |
| Bones of the Human Body | 0 | - | 4.57 | 38,887 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,151 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,412 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,015 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,355 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,394 |
| Random Symbol to Element | 0 | - | 4.88 | 92,265 |
| Astronomy Quiz | 0 | - | 4.90 | 81,765 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,823 |
| Solar System Trivia | 0 | - | 4.93 | 46,068 |
| Environmental Issues | 0 | - | 4.54 | 26,728 |
| Click the Planet | 0 | - | 4.96 | 90,307 |
| Name a Valid Answer - Science | 0 | - | 4.78 | 40,112 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,128 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,613 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,912 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,297 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,280 |
| Word Chain - Science | 0 | - | 4.59 | 54,414 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,372 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,810 |
| Click the Chemical Element | 0 | - | 4.96 | 79,322 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,091,078 |
| Groups of Two - Science | 0 | - | 4.26 | 48,149 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,403 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,671 |
| Science Decoder | 0 | - | 4.52 | 28,657 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,168 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,107 |
| Science True or False | 0 | - | 4.35 | 39,996 |
| Elements by Picture | 0 | - | 4.28 | 69,567 |
| First Names of Scientists | 0 | - | 4.50 | 56,477 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,836 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,233 |
| Name a Valid Element | 0 | - | 4.64 | 69,596 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,664 |
| The Sun Quiz | 0 | - | 4.93 | 34,142 |
| Medical Acronyms | 0 | - | 4.43 | 96,209 |
| Medical Vocabulary | 0 | - | 4.54 | 58,564 |
| Citrus Fruits | 0 | - | 3.65 | 41,955 |
| The Diseases They Had | 0 | - | 4.15 | 13,889 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,644 |
| Birthstones by Month | 0 | - | 4.41 | 80,492 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,406 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,317 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,323 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,706 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,098 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,775 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,223 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,171 |
| Body Part Words | 0 | - | 4.43 | 145,259 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,675 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,834 |
| Three Letter Body Parts | 0 | - | 4.40 | 204,946 |
| Human Body A-Z | 0 | - | 4.51 | 128,463 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,754 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,505 |
| Medical Specialties | 0 | - | 4.29 | 90,916 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,535 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,282 |
| The Pluto Quiz | 0 | - | 4.60 | 9,786 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,212 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,326 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,257 |
| Astronomy Decoder | 0 | - | 4.50 | 37,859 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,396 |
| The Mars Quiz | 0 | - | 4.55 | 18,581 |
| The Saturn Quiz | 0 | - | 4.54 | 11,508 |
| Most Common Body Part Words | 0 | - | 3.88 | 31,533 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,101 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,667 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,694 |
| Name the Constellations | 0 | - | 4.58 | 44,698 |
| Astronomy True or False | 0 | - | 4.38 | 36,275 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,916 |
| The Venus Quiz | 0 | - | 4.21 | 6,891 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,041 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,062 |
| Elements Named for Countries | 0 | - | 4.52 | 24,411 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,632 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,012 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,361 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,318 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,884 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,765 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,547 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,110 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,253 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,468 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,793 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,687 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,104 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,380 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,657 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,447 |
| Least-Forested Countries | 0 | - | 4.53 | 64,915 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,196 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,207 |
| Most Forested European Countries | 0 | - | 4.80 | 74,933 |
| Least Forested European Countries | 0 | - | 4.25 | 53,792 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,439 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,685 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,335 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,726 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,445 |
| Countries with Glaciers | 0 | - | 4.97 | 104,685 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,071 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,028 |
