| International Scientific Units | 0 | - | 4.95 | 157,423 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,020 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,249,773 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,828 |
| Famous Scientists | 0 | - | 4.57 | 42,734 |
| Elements by Symbol | 0 | - | 4.92 | 197,775 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,019 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,427 |
| Noble Gases | 0 | - | 4.89 | 78,471 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,769 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,767 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,966 |
| Name the Virus | 0 | - | 4.87 | 76,897 |
| Scientific Names | 0 | - | 4.32 | 78,574 |
| Famous Effects | 0 | - | 4.62 | 12,640 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 18,198 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,132 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,096 |
| Elemental Words | 0 | - | 4.96 | 52,399 |
| Metals of Antiquity | 0 | - | 4.95 | 93,634 |
| Body Parts - Sudden Death #1 | 0 | - | 4.86 | 65,944 |
| Bones - Sudden Death | 0 | - | 4.95 | 52,823 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 37,104 |
| Elements - Sudden Death | 0 | - | 4.92 | 133,293 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 56,349 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,741 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,042 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,150 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,639 |
| Body Part Cliches | 0 | - | 4.44 | 123,561 |
| Bones of the Human Body | 0 | - | 4.51 | 43,093 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,353 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,593 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.53 | 12,241 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,656 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,705 |
| Random Symbol to Element | 0 | - | 4.88 | 93,331 |
| Astronomy Quiz | 0 | - | 4.90 | 82,865 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,745 |
| Solar System Trivia | 0 | - | 4.93 | 46,844 |
| Environmental Issues | 0 | - | 4.54 | 26,868 |
| Click the Planet | 0 | - | 4.96 | 91,744 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,121 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,376 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,419 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,065 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,101 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,778 |
| Word Chain - Science | 0 | - | 4.59 | 54,998 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,793 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,144 |
| Body Parts - Sudden Death #2 | 0 | - | 4.79 | 43,279 |
| Click the Chemical Element | 0 | - | 4.96 | 80,788 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,099,416 |
| Groups of Two - Science | 0 | - | 4.26 | 48,377 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,987 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,084 |
| Science Decoder | 0 | - | 4.52 | 28,803 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,393 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,348 |
| Science True or False | 0 | - | 4.35 | 40,383 |
| Elements by Picture | 0 | - | 4.27 | 70,102 |
| First Names of Scientists | 0 | - | 4.51 | 57,015 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,111 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,127 |
| Name a Valid Element | 0 | - | 4.67 | 70,192 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 36,030 |
| The Sun Quiz | 0 | - | 4.93 | 34,814 |
| Medical Acronyms | 0 | - | 4.43 | 96,999 |
| Medical Vocabulary | 0 | - | 4.54 | 59,243 |
| Citrus Fruits | 0 | - | 3.63 | 42,100 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,743 |
| The Diseases They Had | 0 | - | 4.15 | 14,031 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,877 |
| Birthstones by Month | 0 | - | 4.42 | 80,780 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,340 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,413 |
| Name the Metal Alloy | 0 | - | 4.73 | 13,881 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,889 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,241 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,451 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,048 |
| Body Part Words | 0 | - | 4.43 | 146,159 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,885 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,776 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,761 |
| Human Body A-Z | 0 | - | 4.51 | 129,397 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,356 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,564 |
| Medical Specialties | 0 | - | 4.32 | 91,894 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 57,986 |
| Element... or Pokémon? | 0 | - | 4.98 | 132,223 |
| The Pluto Quiz | 0 | - | 4.61 | 9,885 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,587 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,814 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,840 |
| Astronomy Decoder | 0 | - | 4.48 | 38,120 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,479 |
| The Mars Quiz | 0 | - | 4.55 | 18,687 |
| The Saturn Quiz | 0 | - | 4.54 | 11,571 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,675 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,446 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,032 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 226,440 |
| Name the Constellations | 0 | - | 4.58 | 45,076 |
| Astronomy True or False | 0 | - | 4.39 | 36,535 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 215,999 |
| The Venus Quiz | 0 | - | 4.21 | 6,934 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,398 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,503 |
| Elements Named for Countries | 0 | - | 4.53 | 24,824 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,739 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,686 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,532 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,484 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,393 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,618 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,774 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,170 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,768 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,667 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,059 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,856 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,648 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,757 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,703 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,700 |
| Least-Forested Countries | 0 | - | 4.53 | 65,296 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,524 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,575 |
| Most Forested European Countries | 0 | - | 4.80 | 75,475 |
| Least Forested European Countries | 0 | - | 4.25 | 54,088 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,803 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,866 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,572 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,195 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,700 |
| Countries with Glaciers | 0 | - | 4.96 | 105,575 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,166 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,323 |
