| Elements of the Periodic Table | 0 | - | 5.00 | 2,227,882 |
| Elements by Symbol | 0 | - | 4.92 | 196,130 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,971 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,646 |
| Noble Gases | 0 | - | 4.89 | 77,687 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,221 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,387 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,148 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 17,165 |
| Elemental Words | 0 | - | 4.96 | 52,094 |
| Metals of Antiquity | 0 | - | 4.94 | 93,081 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 35,373 |
| Elements - Sudden Death | 0 | - | 4.91 | 127,726 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 54,376 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,942 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 187,842 |
| International Scientific Units | 0 | - | 4.95 | 155,845 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,422 |
| Random Symbol to Element | 0 | - | 4.88 | 92,444 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,064 |
| Click the Chemical Element | 0 | - | 4.96 | 79,653 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,066 |
| Name the Virus | 0 | - | 4.86 | 76,479 |
| Elements by Picture | 0 | - | 4.28 | 69,689 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,064 |
| Famous Scientists | 0 | - | 4.57 | 42,520 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,873 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,407 |
| Name a Valid Element | 0 | - | 4.64 | 69,730 |
| Scientific Names | 0 | - | 4.32 | 78,259 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,455 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,724 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,739 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,130 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,734 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 61,939 |
| Bones - Sudden Death | 0 | - | 4.95 | 49,654 |
| Famous Effects | 0 | - | 4.62 | 12,245 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,207 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,444 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,384 |
| Body Part Cliches | 0 | - | 4.43 | 123,166 |
| Bones of the Human Body | 0 | - | 4.52 | 41,261 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,523 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,084 |
| Astronomy Quiz | 0 | - | 4.90 | 82,021 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,231 |
| Solar System Trivia | 0 | - | 4.93 | 46,265 |
| Click the Planet | 0 | - | 4.96 | 90,647 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,464 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,403 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,453 |
| Environmental Issues | 0 | - | 4.54 | 26,764 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,317 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,189 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,991 |
| Science General Knowledge #2 | 0 | - | 4.48 | 117,159 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,652 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,387 |
| Word Chain - Science | 0 | - | 4.59 | 54,548 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,517 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,093,021 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,749 |
| The Sun Quiz | 0 | - | 4.93 | 34,277 |
| First Names of Scientists | 0 | - | 4.50 | 56,604 |
| Groups of Two - Science | 0 | - | 4.26 | 48,191 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,529 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,759 |
| Science Decoder | 0 | - | 4.52 | 28,678 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,213 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,166 |
| Science True or False | 0 | - | 4.35 | 40,088 |
| Medical Acronyms | 0 | - | 4.43 | 96,483 |
| Medical Vocabulary | 0 | - | 4.54 | 58,813 |
| Birthstones by Month | 0 | - | 4.41 | 80,536 |
| Citrus Fruits | 0 | - | 3.63 | 41,978 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,479 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,335 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,973 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,393 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,301 |
| Body Part Words | 0 | - | 4.43 | 145,472 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,727 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,994 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,405 |
| Human Body A-Z | 0 | - | 4.51 | 128,800 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,895 |
| Organs of the Human Body (with map) | 0 | - | 4.11 | 118,775 |
| Medical Specialties | 0 | - | 4.32 | 91,138 |
| The Diseases They Had | 0 | - | 4.15 | 13,946 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 56,891 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,695 |
| The Pluto Quiz | 0 | - | 4.61 | 9,803 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,302 |
| Astronomy Decoder | 0 | - | 4.50 | 37,906 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,415 |
| The Mars Quiz | 0 | - | 4.55 | 18,601 |
| The Saturn Quiz | 0 | - | 4.54 | 11,526 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,812 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 224,375 |
| Name the Constellations | 0 | - | 4.58 | 44,781 |
| Astronomy True or False | 0 | - | 4.39 | 36,326 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,196 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,578 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,169 |
| The Venus Quiz | 0 | - | 4.21 | 6,899 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,114 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,163 |
| Elements Named for Countries | 0 | - | 4.52 | 24,512 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,671 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,132 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,400 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,364 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,032 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,804 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,585 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,125 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,369 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,517 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,858 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,728 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,229 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,444 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,812 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,510 |
| Least-Forested Countries | 0 | - | 4.53 | 64,995 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,274 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,301 |
| Most Forested European Countries | 0 | - | 4.80 | 75,054 |
| Least Forested European Countries | 0 | - | 4.25 | 53,865 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,530 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,721 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,384 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,829 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,503 |
| Countries with Glaciers | 0 | - | 4.97 | 104,799 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,095 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,098 |
