| Elements of the Periodic Table | 0 | - | 5.00 | 2,217,418 |
| Elements by Symbol Quiz | 0 | - | 4.92 | 195,232 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,409 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,335 |
| Noble Gases | 0 | - | 4.89 | 77,310 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 63,939 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,737 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,725 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 16,661 |
| Elemental Words | 0 | - | 4.96 | 51,929 |
| Metals of Antiquity | 0 | - | 4.94 | 92,812 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 34,559 |
| Elements - Sudden Death | 0 | - | 4.91 | 125,287 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 53,497 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,894 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,114 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,154 |
| International Scientific Units | 0 | - | 4.95 | 155,054 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,035 |
| Random Symbol to Element | 0 | - | 4.88 | 92,112 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 11,983 |
| Click the Chemical Element | 0 | - | 4.96 | 79,139 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,217 |
| Name the Virus | 0 | - | 4.86 | 76,166 |
| Elements by Picture | 0 | - | 4.27 | 69,488 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,707 |
| Famous Scientists | 0 | - | 4.57 | 42,390 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,805 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,109 |
| Name a Valid Element | 0 | - | 4.64 | 69,508 |
| Scientific Names | 0 | - | 4.32 | 78,095 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,241 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,528 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,683 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,075 |
| Element... or Pokémon? | 0 | - | 4.98 | 129,980 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 60,432 |
| Bones - Sudden Death | 0 | - | 4.95 | 48,319 |
| Famous Effects | 0 | - | 4.62 | 12,028 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 85,982 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,257 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,172 |
| Body Part Cliches | 0 | - | 4.43 | 122,872 |
| Medical Conditions Quiz | 0 | - | 4.78 | 122,994 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,041 |
| Astronomy Quiz | 0 | - | 4.89 | 81,575 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,570 |
| Solar System Trivia | 0 | - | 4.93 | 45,905 |
| Click the Planet | 0 | - | 4.96 | 90,084 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,383 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,297 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,335 |
| Environmental Issues | 0 | - | 4.54 | 26,710 |
| Name a Valid Answer - Science | 0 | - | 4.78 | 39,976 |
| Body Parts in History and Culture | 0 | - | 4.42 | 34,994 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,320 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,546 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,113 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,202 |
| Word Chain - Science | 0 | - | 4.59 | 54,356 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,326 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,089,813 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,548 |
| The Sun Quiz | 0 | - | 4.93 | 34,036 |
| First Names of Scientists | 0 | - | 4.50 | 56,424 |
| Groups of Two - Science | 0 | - | 4.26 | 48,117 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,332 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,621 |
| Science Decoder | 0 | - | 4.52 | 28,634 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,140 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,074 |
| Science True or False | 0 | - | 4.35 | 39,930 |
| Medical Acronyms | 0 | - | 4.43 | 95,723 |
| Medical Vocabulary | 0 | - | 4.54 | 58,467 |
| Birthstones Quiz | 0 | - | 4.41 | 80,451 |
| Citrus Fruits | 0 | - | 3.65 | 41,939 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,343 |
| Albert Einstein Trivia | 0 | - | 4.57 | 18,302 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,524 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,096 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,090 |
| Body Part Words | 0 | - | 4.43 | 145,079 |
| Animal Anatomy Quiz | 0 | - | 4.38 | 59,610 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,701 |
| Three Letter Body Parts | 0 | - | 4.39 | 204,777 |
| Human Body A-Z | 0 | - | 4.51 | 128,184 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,606 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,037 |
| Medical Specialties | 0 | - | 4.29 | 90,835 |
| The Diseases They Had | 0 | - | 4.15 | 13,875 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,439 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,611 |
| The Pluto Quiz | 0 | - | 4.60 | 9,770 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,171 |
| Astronomy Decoder | 0 | - | 4.50 | 37,809 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,380 |
| The Mars Quiz | 0 | - | 4.54 | 18,571 |
| The Saturn Quiz | 0 | - | 4.54 | 11,494 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,616 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,277 |
| Name the Constellations | 0 | - | 4.58 | 44,622 |
| Astronomy True or False | 0 | - | 4.38 | 36,238 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,400 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,467 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,021 |
| The Venus Quiz | 0 | - | 4.19 | 6,882 |
| U.S. States with Glaciers | 0 | - | 4.61 | 24,984 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 34,999 |
| Elements Named for Countries | 0 | - | 4.52 | 24,346 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,625 |
| Animals by Skeleton Image | 0 | - | 4.80 | 45,919 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,341 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,293 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,811 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,750 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,521 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,093 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,188 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,443 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,751 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,673 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,041 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,325 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,549 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,373 |
| Least-Forested Countries | 0 | - | 4.53 | 64,866 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,145 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,144 |
| Most Forested European Countries | 0 | - | 4.80 | 74,858 |
| Least Forested European Countries | 0 | - | 4.25 | 53,759 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,382 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,652 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,292 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,672 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,411 |
| Countries with Glaciers | 0 | - | 4.97 | 104,587 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,057 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 16,976 |
