| Elements of the Periodic Table | 0 | - | 5.00 | 2,218,224 |
| Elements by Symbol | 0 | - | 4.92 | 195,282 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,465 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,356 |
| Noble Gases | 0 | - | 4.89 | 77,341 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 63,974 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,769 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,756 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 16,720 |
| Elemental Words | 0 | - | 4.96 | 51,937 |
| Metals of Antiquity | 0 | - | 4.94 | 92,830 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 34,616 |
| Elements - Sudden Death | 0 | - | 4.91 | 125,469 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 53,567 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,895 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,147 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,160 |
| International Scientific Units | 0 | - | 4.95 | 155,100 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,058 |
| Random Symbol to Element | 0 | - | 4.88 | 92,131 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 11,990 |
| Click the Chemical Element | 0 | - | 4.96 | 79,171 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,264 |
| Name the Virus | 0 | - | 4.86 | 76,178 |
| Elements by Picture | 0 | - | 4.28 | 69,501 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,726 |
| Famous Scientists | 0 | - | 4.57 | 42,397 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,812 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,137 |
| Name a Valid Element | 0 | - | 4.64 | 69,526 |
| Scientific Names | 0 | - | 4.32 | 78,107 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,254 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,543 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,687 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,080 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,035 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 60,531 |
| Bones - Sudden Death | 0 | - | 4.95 | 48,399 |
| Famous Effects | 0 | - | 4.62 | 12,043 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 85,992 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,265 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,181 |
| Body Part Cliches | 0 | - | 4.43 | 122,891 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,007 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,043 |
| Astronomy Quiz | 0 | - | 4.89 | 81,604 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,606 |
| Solar System Trivia | 0 | - | 4.93 | 45,941 |
| Click the Planet | 0 | - | 4.96 | 90,116 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,388 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,302 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,344 |
| Environmental Issues | 0 | - | 4.54 | 26,711 |
| Name a Valid Answer - Science | 0 | - | 4.78 | 39,999 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,006 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,340 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,558 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,128 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,219 |
| Word Chain - Science | 0 | - | 4.59 | 54,363 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,333 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,050 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,573 |
| The Sun Quiz | 0 | - | 4.93 | 34,055 |
| First Names of Scientists | 0 | - | 4.50 | 56,434 |
| Groups of Two - Science | 0 | - | 4.26 | 48,122 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,345 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,628 |
| Science Decoder | 0 | - | 4.52 | 28,638 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,144 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,081 |
| Science True or False | 0 | - | 4.35 | 39,938 |
| Medical Acronyms | 0 | - | 4.43 | 95,764 |
| Medical Vocabulary | 0 | - | 4.54 | 58,479 |
| Birthstones by Month | 0 | - | 4.41 | 80,462 |
| Citrus Fruits | 0 | - | 3.65 | 41,941 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,353 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,305 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,591 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,116 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,110 |
| Body Part Words | 0 | - | 4.43 | 145,094 |
| Animal Anatomy Quiz | 0 | - | 4.38 | 59,622 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,716 |
| Three Letter Body Parts | 0 | - | 4.39 | 204,791 |
| Human Body A-Z | 0 | - | 4.51 | 128,207 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,626 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,083 |
| Medical Specialties | 0 | - | 4.29 | 90,852 |
| The Diseases They Had | 0 | - | 4.15 | 13,879 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,453 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,618 |
| The Pluto Quiz | 0 | - | 4.60 | 9,771 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,177 |
| Astronomy Decoder | 0 | - | 4.50 | 37,818 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,381 |
| The Mars Quiz | 0 | - | 4.54 | 18,571 |
| The Saturn Quiz | 0 | - | 4.54 | 11,495 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,628 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,359 |
| Name the Constellations | 0 | - | 4.58 | 44,630 |
| Astronomy True or False | 0 | - | 4.38 | 36,239 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,436 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,475 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,030 |
| The Venus Quiz | 0 | - | 4.19 | 6,884 |
| U.S. States with Glaciers | 0 | - | 4.61 | 24,998 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,011 |
| Elements Named for Countries | 0 | - | 4.52 | 24,357 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,627 |
| Animals by Skeleton Image | 0 | - | 4.80 | 45,935 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,343 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,297 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,827 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,753 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,523 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,097 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,204 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,450 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,758 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,674 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,056 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,341 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,568 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,388 |
| Least-Forested Countries | 0 | - | 4.53 | 64,874 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,153 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,154 |
| Most Forested European Countries | 0 | - | 4.80 | 74,871 |
| Least Forested European Countries | 0 | - | 4.25 | 53,770 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,396 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,657 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,296 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,677 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,418 |
| Countries with Glaciers | 0 | - | 4.97 | 104,609 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,059 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 16,986 |
