| Elements of the Periodic Table | 0 | - | 5.00 | 2,249,553 |
| Elements by Symbol | 0 | - | 4.92 | 197,748 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,007 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,424 |
| Noble Gases | 0 | - | 4.89 | 78,457 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,760 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,750 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,961 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 18,185 |
| Elemental Words | 0 | - | 4.96 | 52,395 |
| Metals of Antiquity | 0 | - | 4.95 | 93,623 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 37,080 |
| Elements - Sudden Death | 0 | - | 4.92 | 133,233 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 56,310 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,040 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,138 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,634 |
| International Scientific Units | 0 | - | 4.95 | 157,412 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,016 |
| Random Symbol to Element | 0 | - | 4.88 | 93,278 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.53 | 12,240 |
| Click the Chemical Element | 0 | - | 4.96 | 80,785 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,137 |
| Name the Virus | 0 | - | 4.87 | 76,894 |
| Elements by Picture | 0 | - | 4.27 | 70,094 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,824 |
| Famous Scientists | 0 | - | 4.57 | 42,730 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,109 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,118 |
| Name a Valid Element | 0 | - | 4.67 | 70,190 |
| Scientific Names | 0 | - | 4.32 | 78,574 |
| Name the Metal Alloy | 0 | - | 4.73 | 13,878 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,091 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,888 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,237 |
| Element... or Pokémon? | 0 | - | 4.98 | 132,210 |
| Body Parts - Sudden Death #1 | 0 | - | 4.86 | 65,925 |
| Bones - Sudden Death | 0 | - | 4.95 | 52,807 |
| Famous Effects | 0 | - | 4.62 | 12,636 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,733 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,806 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,836 |
| Body Part Cliches | 0 | - | 4.44 | 123,558 |
| Bones of the Human Body | 0 | - | 4.51 | 43,080 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,347 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,132 |
| Astronomy Quiz | 0 | - | 4.90 | 82,859 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,737 |
| Solar System Trivia | 0 | - | 4.93 | 46,838 |
| Click the Planet | 0 | - | 4.96 | 91,738 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,592 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,656 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,702 |
| Environmental Issues | 0 | - | 4.54 | 26,868 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,115 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,376 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,402 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,053 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,086 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,774 |
| Word Chain - Science | 0 | - | 4.59 | 54,993 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,785 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,099,358 |
| Body Parts - Sudden Death #2 | 0 | - | 4.79 | 43,153 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 36,027 |
| The Sun Quiz | 0 | - | 4.93 | 34,806 |
| First Names of Scientists | 0 | - | 4.51 | 57,014 |
| Groups of Two - Science | 0 | - | 4.26 | 48,376 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,983 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,081 |
| Science Decoder | 0 | - | 4.52 | 28,801 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,393 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,348 |
| Science True or False | 0 | - | 4.35 | 40,381 |
| Medical Acronyms | 0 | - | 4.43 | 96,995 |
| Medical Vocabulary | 0 | - | 4.54 | 59,237 |
| Birthstones by Month | 0 | - | 4.42 | 80,780 |
| Citrus Fruits | 0 | - | 3.63 | 42,100 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,338 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,412 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,446 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,041 |
| Body Part Words | 0 | - | 4.43 | 146,155 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,884 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,772 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,752 |
| Human Body A-Z | 0 | - | 4.51 | 129,393 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,352 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,558 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,742 |
| Medical Specialties | 0 | - | 4.32 | 91,891 |
| The Diseases They Had | 0 | - | 4.15 | 14,031 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 57,978 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,876 |
| The Pluto Quiz | 0 | - | 4.61 | 9,885 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,581 |
| Astronomy Decoder | 0 | - | 4.49 | 38,115 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,479 |
| The Mars Quiz | 0 | - | 4.55 | 18,686 |
| The Saturn Quiz | 0 | - | 4.54 | 11,570 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,671 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,030 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 226,420 |
| Name the Constellations | 0 | - | 4.58 | 45,076 |
| Astronomy True or False | 0 | - | 4.39 | 36,533 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 215,995 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,442 |
| The Venus Quiz | 0 | - | 4.21 | 6,934 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,394 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,498 |
| Elements Named for Countries | 0 | - | 4.53 | 24,819 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,738 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,679 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,531 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,482 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,389 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,608 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,771 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,169 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,764 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,665 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,055 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,855 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,644 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,752 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,700 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,697 |
| Least-Forested Countries | 0 | - | 4.53 | 65,294 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,522 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,570 |
| Most Forested European Countries | 0 | - | 4.80 | 75,469 |
| Least Forested European Countries | 0 | - | 4.25 | 54,085 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,799 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,864 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,571 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,192 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,697 |
| Countries with Glaciers | 0 | - | 4.96 | 105,571 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,165 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,318 |
