| Elements of the Periodic Table | 0 | - | 5.00 | 2,241,702 |
| Elements by Symbol | 0 | - | 4.92 | 197,185 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,647 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,202 |
| Noble Gases | 0 | - | 4.89 | 78,142 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,560 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,180 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,634 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 17,780 |
| Elemental Words | 0 | - | 4.96 | 52,279 |
| Metals of Antiquity | 0 | - | 4.95 | 93,418 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 36,343 |
| Elements - Sudden Death | 0 | - | 4.91 | 130,920 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 55,465 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,999 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,725 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,501 |
| International Scientific Units | 0 | - | 4.95 | 156,784 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,754 |
| Random Symbol to Element | 0 | - | 4.88 | 93,031 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,169 |
| Click the Chemical Element | 0 | - | 4.96 | 80,375 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,806 |
| Name the Virus | 0 | - | 4.87 | 76,734 |
| Elements by Picture | 0 | - | 4.27 | 69,930 |
| Major Taxonomic Ranks | 0 | - | 4.56 | 80,531 |
| Famous Scientists | 0 | - | 4.57 | 42,640 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,014 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,876 |
| Name a Valid Element | 0 | - | 4.64 | 70,023 |
| Scientific Names | 0 | - | 4.32 | 78,446 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,727 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,964 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,822 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,194 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,680 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 63,176 |
| Bones - Sudden Death | 0 | - | 4.95 | 50,620 |
| Famous Effects | 0 | - | 4.62 | 12,490 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,535 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,683 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,666 |
| Body Part Cliches | 0 | - | 4.43 | 123,292 |
| Bones of the Human Body | 0 | - | 4.52 | 42,370 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,145 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,114 |
| Astronomy Quiz | 0 | - | 4.90 | 82,557 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,188 |
| Solar System Trivia | 0 | - | 4.93 | 46,635 |
| Click the Planet | 0 | - | 4.96 | 91,348 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,543 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,565 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,602 |
| Environmental Issues | 0 | - | 4.54 | 26,829 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,925 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,270 |
| Science General Knowledge #1 | 0 | - | 4.54 | 165,946 |
| Science General Knowledge #2 | 0 | - | 4.48 | 118,784 |
| Science General Knowledge #3 | 0 | - | 4.56 | 108,633 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,639 |
| Word Chain - Science | 0 | - | 4.59 | 54,868 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,692 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,097,169 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,920 |
| The Sun Quiz | 0 | - | 4.93 | 34,660 |
| First Names of Scientists | 0 | - | 4.51 | 56,838 |
| Groups of Two - Science | 0 | - | 4.26 | 48,315 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,827 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,980 |
| Science Decoder | 0 | - | 4.52 | 28,764 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,312 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,279 |
| Science True or False | 0 | - | 4.35 | 40,285 |
| Medical Acronyms | 0 | - | 4.43 | 96,828 |
| Medical Vocabulary | 0 | - | 4.54 | 59,086 |
| Birthstones by Month | 0 | - | 4.42 | 80,675 |
| Citrus Fruits | 0 | - | 3.63 | 42,071 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,123 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,387 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 28,296 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,811 |
| Body Part Words | 0 | - | 4.43 | 145,936 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,817 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,323 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,576 |
| Human Body A-Z | 0 | - | 4.51 | 129,157 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,157 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,242 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,654 |
| Medical Specialties | 0 | - | 4.32 | 91,760 |
| The Diseases They Had | 0 | - | 4.15 | 14,005 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.69 | 57,735 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,800 |
| The Pluto Quiz | 0 | - | 4.61 | 9,851 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,481 |
| Astronomy Decoder | 0 | - | 4.49 | 38,046 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,457 |
| The Mars Quiz | 0 | - | 4.55 | 18,661 |
| The Saturn Quiz | 0 | - | 4.54 | 11,554 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,563 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,969 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 225,673 |
| Name the Constellations | 0 | - | 4.58 | 44,965 |
| Astronomy True or False | 0 | - | 4.39 | 36,463 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,674 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,329 |
| The Venus Quiz | 0 | - | 4.21 | 6,922 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,278 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,388 |
| Elements Named for Countries | 0 | - | 4.53 | 24,686 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,707 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,473 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,478 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,439 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,269 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,356 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,710 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,153 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,635 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,620 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,981 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,808 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,514 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,649 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,529 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,630 |
| Least-Forested Countries | 0 | - | 4.53 | 65,190 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,425 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,472 |
| Most Forested European Countries | 0 | - | 4.80 | 75,306 |
| Least Forested European Countries | 0 | - | 4.25 | 54,006 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,702 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,811 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,510 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,059 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,636 |
| Countries with Glaciers | 0 | - | 4.97 | 105,394 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,143 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,246 |
