| International Scientific Units | 0 | - | 4.95 | 157,105 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,867 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,245,657 |
| Major Taxonomic Ranks | 0 | - | 4.56 | 80,679 |
| Famous Scientists | 0 | - | 4.57 | 42,676 |
| Elements by Symbol | 0 | - | 4.92 | 197,455 |
| Speed Symbol by Element | 0 | - | 4.90 | 104,823 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,307 |
| Noble Gases | 0 | - | 4.89 | 78,300 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,666 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,487 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,791 |
| Name the Virus | 0 | - | 4.87 | 76,811 |
| Scientific Names | 0 | - | 4.32 | 78,505 |
| Famous Effects | 0 | - | 4.62 | 12,563 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 17,978 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,122 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,023 |
| Elemental Words | 0 | - | 4.97 | 52,330 |
| Metals of Antiquity | 0 | - | 4.95 | 93,509 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 64,381 |
| Bones - Sudden Death | 0 | - | 4.95 | 51,521 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 36,677 |
| Elements - Sudden Death | 0 | - | 4.91 | 131,995 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 55,863 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,622 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,022 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,931 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,558 |
| Body Part Cliches | 0 | - | 4.43 | 123,397 |
| Bones of the Human Body | 0 | - | 4.52 | 42,694 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,238 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,568 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.53 | 12,202 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,607 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,645 |
| Random Symbol to Element | 0 | - | 4.88 | 93,170 |
| Astronomy Quiz | 0 | - | 4.90 | 82,705 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,445 |
| Solar System Trivia | 0 | - | 4.93 | 46,711 |
| Environmental Issues | 0 | - | 4.54 | 26,845 |
| Click the Planet | 0 | - | 4.96 | 91,534 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,013 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,316 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,168 |
| Science General Knowledge #2 | 0 | - | 4.48 | 118,924 |
| Science General Knowledge #3 | 0 | - | 4.56 | 108,888 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,690 |
| Word Chain - Science | 0 | - | 4.59 | 54,931 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,733 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,967 |
| Click the Chemical Element | 0 | - | 4.96 | 80,607 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,098,260 |
| Groups of Two - Science | 0 | - | 4.26 | 48,344 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,902 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,026 |
| Science Decoder | 0 | - | 4.52 | 28,782 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,352 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,311 |
| Science True or False | 0 | - | 4.35 | 40,336 |
| Elements by Picture | 0 | - | 4.27 | 70,013 |
| First Names of Scientists | 0 | - | 4.51 | 56,928 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,062 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,981 |
| Name a Valid Element | 0 | - | 4.67 | 70,108 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,979 |
| The Sun Quiz | 0 | - | 4.93 | 34,735 |
| Medical Acronyms | 0 | - | 4.43 | 96,896 |
| Medical Vocabulary | 0 | - | 4.54 | 59,156 |
| Citrus Fruits | 0 | - | 3.63 | 42,082 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,690 |
| The Diseases They Had | 0 | - | 4.15 | 14,021 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,834 |
| Birthstones by Month | 0 | - | 4.42 | 80,731 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,201 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,400 |
| Name the Metal Alloy | 0 | - | 4.73 | 13,796 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,845 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,212 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,383 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,928 |
| Body Part Words | 0 | - | 4.43 | 146,039 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,842 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,660 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,658 |
| Human Body A-Z | 0 | - | 4.51 | 129,257 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,236 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,387 |
| Medical Specialties | 0 | - | 4.32 | 91,811 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.69 | 57,844 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,933 |
| The Pluto Quiz | 0 | - | 4.61 | 9,868 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,533 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,744 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,738 |
| Astronomy Decoder | 0 | - | 4.49 | 38,081 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,465 |
| The Mars Quiz | 0 | - | 4.55 | 18,672 |
| The Saturn Quiz | 0 | - | 4.54 | 11,561 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,613 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,389 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,004 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 226,050 |
| Name the Constellations | 0 | - | 4.58 | 45,011 |
| Astronomy True or False | 0 | - | 4.39 | 36,498 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,830 |
| The Venus Quiz | 0 | - | 4.21 | 6,929 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,342 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,441 |
| Elements Named for Countries | 0 | - | 4.53 | 24,745 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,729 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,580 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,505 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,463 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,339 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,481 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,735 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,156 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,701 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,647 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,013 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,830 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,584 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,704 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,615 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,660 |
| Least-Forested Countries | 0 | - | 4.53 | 65,243 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,484 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,525 |
| Most Forested European Countries | 0 | - | 4.80 | 75,392 |
| Least Forested European Countries | 0 | - | 4.25 | 54,042 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,745 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,842 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,537 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,116 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,666 |
| Countries with Glaciers | 0 | - | 4.97 | 105,484 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,153 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,289 |
