| International Scientific Units | 0 | - | 4.95 | 157,092 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,863 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,245,594 |
| Major Taxonomic Ranks | 0 | - | 4.56 | 80,668 |
| Famous Scientists | 0 | - | 4.57 | 42,676 |
| Elements by Symbol | 0 | - | 4.92 | 197,449 |
| Speed Symbol by Element | 0 | - | 4.90 | 104,817 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,303 |
| Noble Gases | 0 | - | 4.89 | 78,291 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,660 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,478 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,788 |
| Name the Virus | 0 | - | 4.87 | 76,810 |
| Scientific Names | 0 | - | 4.32 | 78,503 |
| Famous Effects | 0 | - | 4.62 | 12,561 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 17,971 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,122 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,023 |
| Elemental Words | 0 | - | 4.97 | 52,328 |
| Metals of Antiquity | 0 | - | 4.95 | 93,506 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 64,284 |
| Bones - Sudden Death | 0 | - | 4.95 | 51,425 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 36,667 |
| Elements - Sudden Death | 0 | - | 4.91 | 131,961 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 55,855 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,618 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,020 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,923 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,556 |
| Body Part Cliches | 0 | - | 4.43 | 123,382 |
| Bones of the Human Body | 0 | - | 4.52 | 42,682 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,232 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,566 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.53 | 12,202 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,606 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,645 |
| Random Symbol to Element | 0 | - | 4.88 | 93,168 |
| Astronomy Quiz | 0 | - | 4.90 | 82,702 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,431 |
| Solar System Trivia | 0 | - | 4.93 | 46,710 |
| Environmental Issues | 0 | - | 4.54 | 26,844 |
| Click the Planet | 0 | - | 4.96 | 91,532 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,012 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,315 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,166 |
| Science General Knowledge #2 | 0 | - | 4.48 | 118,921 |
| Science General Knowledge #3 | 0 | - | 4.56 | 108,882 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,689 |
| Word Chain - Science | 0 | - | 4.59 | 54,931 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,732 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,959 |
| Click the Chemical Element | 0 | - | 4.96 | 80,602 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,098,236 |
| Groups of Two - Science | 0 | - | 4.26 | 48,344 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,901 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,024 |
| 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 | 70,012 |
| First Names of Scientists | 0 | - | 4.51 | 56,927 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,060 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,981 |
| Name a Valid Element | 0 | - | 4.67 | 70,107 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,978 |
| The Sun Quiz | 0 | - | 4.93 | 34,735 |
| Medical Acronyms | 0 | - | 4.43 | 96,891 |
| Medical Vocabulary | 0 | - | 4.54 | 59,154 |
| Citrus Fruits | 0 | - | 3.63 | 42,082 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,687 |
| The Diseases They Had | 0 | - | 4.15 | 14,020 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,833 |
| Birthstones by Month | 0 | - | 4.42 | 80,730 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,196 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,399 |
| Name the Metal Alloy | 0 | - | 4.73 | 13,795 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,843 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,210 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,380 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,924 |
| Body Part Words | 0 | - | 4.43 | 146,030 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,840 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,655 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,653 |
| Human Body A-Z | 0 | - | 4.51 | 129,253 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,235 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,379 |
| Medical Specialties | 0 | - | 4.32 | 91,808 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.69 | 57,842 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,922 |
| The Pluto Quiz | 0 | - | 4.61 | 9,867 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,531 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,743 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,735 |
| Astronomy Decoder | 0 | - | 4.49 | 38,080 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,464 |
| The Mars Quiz | 0 | - | 4.55 | 18,672 |
| The Saturn Quiz | 0 | - | 4.54 | 11,561 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,610 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,388 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,003 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 226,038 |
| Name the Constellations | 0 | - | 4.58 | 45,011 |
| Astronomy True or False | 0 | - | 4.39 | 36,497 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,828 |
| The Venus Quiz | 0 | - | 4.21 | 6,929 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,340 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,438 |
| 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 | 46,578 |
| 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 | 45,338 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,479 |
| 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 | 64,696 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,647 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,011 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,829 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,583 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,704 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,614 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,659 |
| Least-Forested Countries | 0 | - | 4.53 | 65,243 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,481 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,524 |
| Most Forested European Countries | 0 | - | 4.80 | 75,391 |
| 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 | 46,536 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,115 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,666 |
| Countries with Glaciers | 0 | - | 4.97 | 105,483 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,153 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,289 |
