| Elements of the Periodic Table | 0 | - | 5.00 | 2,227,322 |
| Elements by Symbol | 0 | - | 4.92 | 196,097 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,935 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,639 |
| Noble Gases | 0 | - | 4.89 | 77,665 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,204 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,360 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,127 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 17,142 |
| Elemental Words | 0 | - | 4.96 | 52,088 |
| Metals of Antiquity | 0 | - | 4.94 | 93,071 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 35,323 |
| Elements - Sudden Death | 0 | - | 4.91 | 127,577 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 54,313 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,939 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 187,795 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,290 |
| International Scientific Units | 0 | - | 4.95 | 155,817 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,418 |
| Random Symbol to Element | 0 | - | 4.88 | 92,429 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,056 |
| Click the Chemical Element | 0 | - | 4.96 | 79,606 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,049 |
| Name the Virus | 0 | - | 4.86 | 76,466 |
| Elements by Picture | 0 | - | 4.28 | 69,678 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,059 |
| Famous Scientists | 0 | - | 4.57 | 42,518 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,870 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,389 |
| Name a Valid Element | 0 | - | 4.64 | 69,722 |
| Scientific Names | 0 | - | 4.32 | 78,252 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,447 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,714 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,736 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,129 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,688 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 61,890 |
| Bones - Sudden Death | 0 | - | 4.95 | 49,610 |
| Famous Effects | 0 | - | 4.62 | 12,231 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,187 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,430 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,372 |
| Body Part Cliches | 0 | - | 4.43 | 123,161 |
| Bones of the Human Body | 0 | - | 4.52 | 41,189 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,504 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,082 |
| Astronomy Quiz | 0 | - | 4.90 | 82,001 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,198 |
| Solar System Trivia | 0 | - | 4.93 | 46,246 |
| Click the Planet | 0 | - | 4.96 | 90,607 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,459 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,396 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,448 |
| Environmental Issues | 0 | - | 4.54 | 26,759 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,300 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,184 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,952 |
| Science General Knowledge #2 | 0 | - | 4.48 | 117,139 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,630 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,377 |
| Word Chain - Science | 0 | - | 4.59 | 54,527 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,505 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,092,824 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,744 |
| The Sun Quiz | 0 | - | 4.93 | 34,268 |
| First Names of Scientists | 0 | - | 4.50 | 56,600 |
| Groups of Two - Science | 0 | - | 4.26 | 48,183 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,516 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,749 |
| Science Decoder | 0 | - | 4.52 | 28,674 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,210 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,164 |
| Science True or False | 0 | - | 4.35 | 40,080 |
| Medical Acronyms | 0 | - | 4.43 | 96,467 |
| Medical Vocabulary | 0 | - | 4.54 | 58,803 |
| Birthstones by Month | 0 | - | 4.41 | 80,528 |
| Citrus Fruits | 0 | - | 3.63 | 41,978 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,473 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,333 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,962 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,381 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,287 |
| Body Part Words | 0 | - | 4.43 | 145,464 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,724 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,985 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,400 |
| Human Body A-Z | 0 | - | 4.51 | 128,790 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,891 |
| Organs of the Human Body (with map) | 0 | - | 4.11 | 118,760 |
| Medical Specialties | 0 | - | 4.32 | 91,130 |
| The Diseases They Had | 0 | - | 4.15 | 13,941 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 56,786 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,693 |
| The Pluto Quiz | 0 | - | 4.61 | 9,801 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,289 |
| Astronomy Decoder | 0 | - | 4.50 | 37,902 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,411 |
| The Mars Quiz | 0 | - | 4.55 | 18,600 |
| The Saturn Quiz | 0 | - | 4.54 | 11,523 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,809 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 224,322 |
| Name the Constellations | 0 | - | 4.58 | 44,776 |
| Astronomy True or False | 0 | - | 4.39 | 36,322 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,176 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,572 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,162 |
| The Venus Quiz | 0 | - | 4.21 | 6,899 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,106 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,154 |
| Elements Named for Countries | 0 | - | 4.52 | 24,499 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,670 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,123 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,399 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,361 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,021 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,800 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,580 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,125 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,359 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,513 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,851 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,726 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,220 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,440 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,799 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,502 |
| Least-Forested Countries | 0 | - | 4.53 | 64,987 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,262 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,284 |
| Most Forested European Countries | 0 | - | 4.80 | 75,042 |
| Least Forested European Countries | 0 | - | 4.25 | 53,859 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,524 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,720 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,376 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,827 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,497 |
| Countries with Glaciers | 0 | - | 4.97 | 104,787 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,091 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,092 |
