| International Scientific Units | 0 | - | 4.95 | 158,382 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,350 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,261,299 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 81,159 |
| Famous Scientists | 0 | - | 4.58 | 42,860 |
| Elements by Symbol | 0 | - | 4.92 | 198,700 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,612 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,811 |
| Noble Gases | 0 | - | 4.89 | 78,856 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 65,095 |
| Periodic Table Symbols | 0 | - | 4.97 | 80,807 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 82,447 |
| Name the Virus | 0 | - | 4.87 | 77,126 |
| Scientific Names | 0 | - | 4.32 | 78,737 |
| Famous Effects | 0 | - | 4.59 | 12,845 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 18,803 |
| Body Parts - Sudden Death #1 | 0 | - | 4.86 | 66,974 |
| Bones - Sudden Death | 0 | - | 4.95 | 53,723 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 38,043 |
| Elements - Sudden Death | 0 | - | 4.92 | 135,962 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,162 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,294 |
| Elemental Words | 0 | - | 4.97 | 52,565 |
| Metals of Antiquity | 0 | - | 4.95 | 93,949 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 57,228 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,995 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,498 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,096 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,785 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,841 |
| Body Part Cliches | 0 | - | 4.44 | 123,672 |
| Bones of the Human Body | 0 | - | 4.51 | 43,618 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,923 |
| Click the Planet | 0 | - | 4.96 | 92,270 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,670 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.46 | 12,329 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,766 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,846 |
| Random Symbol to Element | 0 | - | 4.88 | 94,067 |
| Astronomy Quiz | 0 | - | 4.90 | 83,327 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 138,512 |
| Solar System Trivia | 0 | - | 4.93 | 47,199 |
| Environmental Issues | 0 | - | 4.54 | 26,912 |
| Body Parts - Sudden Death #2 | 0 | - | 4.78 | 46,378 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,441 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,449 |
| Science General Knowledge #1 | 0 | - | 4.54 | 167,393 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,698 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,619 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,975 |
| Word Chain - Science | 0 | - | 4.59 | 55,167 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,963 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,502 |
| Click the Chemical Element | 0 | - | 4.96 | 81,391 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,102,712 |
| Groups of Two - Science | 0 | - | 4.26 | 48,469 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,201 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,240 |
| Science Decoder | 0 | - | 4.52 | 28,862 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,517 |
| Science True or False | 0 | - | 4.35 | 40,518 |
| Elements by Picture | 0 | - | 4.27 | 70,334 |
| First Names of Scientists | 0 | - | 4.51 | 57,236 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,208 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 103,522 |
| Name a Valid Element | 0 | - | 4.68 | 70,421 |
| Name the Constellations - With a Map | 0 | - | 4.91 | 36,228 |
| The Sun Quiz | 0 | - | 4.93 | 35,118 |
| Medical Acronyms | 0 | - | 4.43 | 97,268 |
| Medical Vocabulary | 0 | - | 4.54 | 59,497 |
| Citrus Fruits | 0 | - | 3.67 | 42,202 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,830 |
| The Diseases They Had | 0 | - | 4.15 | 14,073 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,964 |
| Birthstones by Month | 0 | - | 4.44 | 88,159 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,553 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,477 |
| Name the Metal Alloy | 0 | - | 4.73 | 14,067 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,973 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,329 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,641 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,407 |
| Body Part Words | 0 | - | 4.43 | 146,412 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,958 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 177,094 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,922 |
| Human Body A-Z | 0 | - | 4.51 | 130,065 |
| One-Syllable Human Body Parts | 0 | - | 4.30 | 88,552 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,936 |
| Medical Specialties | 0 | - | 4.33 | 92,324 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,260 |
| Element... or Pokémon? | 0 | - | 4.98 | 133,024 |
| The Pluto Quiz | 0 | - | 4.61 | 9,938 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,757 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,975 |
| Category Elimination - Elements | 0 | - | 4.61 | 54,133 |
| Astronomy Decoder | 0 | - | 4.48 | 38,234 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,530 |
| The Mars Quiz | 0 | - | 4.55 | 18,740 |
| The Saturn Quiz | 0 | - | 4.54 | 11,598 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,846 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,577 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,188 |
| Signs of the Zodiac Quiz | 0 | - | 4.46 | 227,772 |
| Name the Constellations | 0 | - | 4.63 | 48,250 |
| Astronomy True or False | 0 | - | 4.39 | 36,618 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 216,480 |
| The Venus Quiz | 0 | - | 4.21 | 6,965 |
| Countries with Glaciers | 0 | - | 4.97 | 105,820 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,195 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,529 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,690 |
| Elements Named for Countries | 0 | - | 4.52 | 24,977 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,775 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,966 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,602 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,539 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,563 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.10 | 26,918 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.98 | 110,027 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,196 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,980 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,738 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,187 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.25 | 25,924 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,868 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,912 |
| Countries with the Most Forest | 0 | - | 4.87 | 148,004 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,773 |
| Least-Forested Countries | 0 | - | 4.53 | 65,426 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,653 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,726 |
| Most Forested European Countries | 0 | - | 4.80 | 75,694 |
| Least Forested European Countries | 0 | - | 4.25 | 54,198 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,939 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.63 | 37,956 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,685 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,352 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,789 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,468 |
