| Elements of the Periodic Table | 0 | - | 5.00 | 2,231,282 |
| Elements by Symbol | 0 | - | 4.92 | 196,342 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,164 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,736 |
| Noble Gases | 0 | - | 4.89 | 77,799 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,309 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,571 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,243 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 17,311 |
| Elemental Words | 0 | - | 4.96 | 52,137 |
| Metals of Antiquity | 0 | - | 4.94 | 93,153 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 35,586 |
| Elements - Sudden Death | 0 | - | 4.91 | 128,425 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 54,617 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,956 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 187,959 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,354 |
| International Scientific Units | 0 | - | 4.95 | 156,050 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,483 |
| Random Symbol to Element | 0 | - | 4.88 | 92,537 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,091 |
| Click the Chemical Element | 0 | - | 4.96 | 79,818 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,170 |
| Name the Virus | 0 | - | 4.86 | 76,541 |
| Elements by Picture | 0 | - | 4.27 | 69,744 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,183 |
| Famous Scientists | 0 | - | 4.57 | 42,542 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,908 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,526 |
| Name a Valid Element | 0 | - | 4.64 | 69,788 |
| Scientific Names | 0 | - | 4.32 | 78,292 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,513 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,772 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,760 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,149 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,961 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 62,202 |
| Bones - Sudden Death | 0 | - | 4.95 | 49,855 |
| Famous Effects | 0 | - | 4.62 | 12,302 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,274 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,518 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,444 |
| Body Part Cliches | 0 | - | 4.43 | 123,195 |
| Bones of the Human Body | 0 | - | 4.52 | 41,634 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,854 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,094 |
| Astronomy Quiz | 0 | - | 4.90 | 82,144 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,457 |
| Solar System Trivia | 0 | - | 4.93 | 46,345 |
| Click the Planet | 0 | - | 4.96 | 90,776 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,480 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,428 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,489 |
| Environmental Issues | 0 | - | 4.54 | 26,775 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,409 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,216 |
| Science General Knowledge #1 | 0 | - | 4.54 | 164,172 |
| Science General Knowledge #2 | 0 | - | 4.48 | 117,255 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,739 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,426 |
| Word Chain - Science | 0 | - | 4.59 | 54,631 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,561 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,093,961 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,795 |
| The Sun Quiz | 0 | - | 4.93 | 34,350 |
| First Names of Scientists | 0 | - | 4.50 | 56,652 |
| Groups of Two - Science | 0 | - | 4.26 | 48,215 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,579 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,787 |
| Science Decoder | 0 | - | 4.52 | 28,690 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,233 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,193 |
| Science True or False | 0 | - | 4.35 | 40,144 |
| Medical Acronyms | 0 | - | 4.43 | 96,562 |
| Medical Vocabulary | 0 | - | 4.54 | 58,892 |
| Birthstones by Month | 0 | - | 4.41 | 80,565 |
| Citrus Fruits | 0 | - | 3.63 | 41,999 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,519 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,341 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 28,055 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,482 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,366 |
| Body Part Words | 0 | - | 4.43 | 145,750 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,742 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,071 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,442 |
| Human Body A-Z | 0 | - | 4.51 | 128,889 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,954 |
| Organs of the Human Body (with map) | 0 | - | 4.11 | 118,887 |
| Medical Specialties | 0 | - | 4.32 | 91,211 |
| The Diseases They Had | 0 | - | 4.15 | 13,964 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 57,308 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,716 |
| The Pluto Quiz | 0 | - | 4.61 | 9,809 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,341 |
| Astronomy Decoder | 0 | - | 4.50 | 37,937 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,423 |
| The Mars Quiz | 0 | - | 4.55 | 18,612 |
| The Saturn Quiz | 0 | - | 4.54 | 11,531 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,862 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 224,718 |
| Name the Constellations | 0 | - | 4.58 | 44,853 |
| Astronomy True or False | 0 | - | 4.39 | 36,359 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,308 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,589 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,204 |
| The Venus Quiz | 0 | - | 4.21 | 6,904 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,151 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,217 |
| Elements Named for Countries | 0 | - | 4.52 | 24,552 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,680 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,204 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,413 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,386 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,085 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 25,192 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,620 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,136 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,413 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,540 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,884 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,740 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,292 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,483 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,892 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,542 |
| Least-Forested Countries | 0 | - | 4.53 | 65,047 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,303 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,338 |
| Most Forested European Countries | 0 | - | 4.80 | 75,118 |
| Least Forested European Countries | 0 | - | 4.25 | 53,891 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,567 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,739 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,417 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,882 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,530 |
| Countries with Glaciers | 0 | - | 4.97 | 104,867 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,106 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,135 |
