| Elements of the Periodic Table | 0 | - | 5.00 | 2,217,115 |
| Elements by Symbol Quiz | 0 | - | 4.92 | 195,223 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,401 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,331 |
| Noble Gases | 0 | - | 4.89 | 77,308 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 63,933 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,726 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,719 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.86 | 16,650 |
| Elemental Words | 0 | - | 4.96 | 51,926 |
| Metals of Antiquity | 0 | - | 4.94 | 92,810 |
| First Twenty Elements - Sudden Death | 0 | - | 4.82 | 34,547 |
| Elements - Sudden Death | 0 | - | 4.91 | 125,228 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 53,489 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,893 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,109 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,152 |
| International Scientific Units | 0 | - | 4.95 | 155,037 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,027 |
| Random Symbol to Element | 0 | - | 4.88 | 92,110 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 11,983 |
| Click the Chemical Element | 0 | - | 4.96 | 79,115 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,212 |
| Name the Virus | 0 | - | 4.86 | 76,162 |
| Elements by Picture | 0 | - | 4.27 | 69,483 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,702 |
| Famous Scientists | 0 | - | 4.57 | 42,387 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,803 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,106 |
| Name a Valid Element | 0 | - | 4.64 | 69,504 |
| Scientific Names | 0 | - | 4.32 | 78,091 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,235 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,527 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,682 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,073 |
| Element... or Pokémon? | 0 | - | 4.98 | 129,964 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 60,390 |
| Bones - Sudden Death | 0 | - | 4.95 | 48,298 |
| Famous Effects | 0 | - | 4.62 | 12,021 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 85,976 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,253 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,165 |
| Body Part Cliches | 0 | - | 4.43 | 122,870 |
| Medical Conditions Quiz | 0 | - | 4.78 | 122,993 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,039 |
| Astronomy Quiz | 0 | - | 4.89 | 81,567 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,548 |
| Solar System Trivia | 0 | - | 4.93 | 45,894 |
| Click the Planet | 0 | - | 4.96 | 90,068 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,380 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,296 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,333 |
| Environmental Issues | 0 | - | 4.54 | 26,708 |
| Name a Valid Answer - Science | 0 | - | 4.78 | 39,970 |
| Body Parts in History and Culture | 0 | - | 4.42 | 34,993 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,307 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,539 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,107 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,197 |
| Word Chain - Science | 0 | - | 4.59 | 54,349 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,324 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,089,730 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,547 |
| The Sun Quiz | 0 | - | 4.93 | 34,020 |
| First Names of Scientists | 0 | - | 4.50 | 56,421 |
| Groups of Two - Science | 0 | - | 4.26 | 48,116 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,328 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,619 |
| Science Decoder | 0 | - | 4.52 | 28,634 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,137 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,073 |
| Science True or False | 0 | - | 4.35 | 39,925 |
| Medical Acronyms | 0 | - | 4.43 | 95,716 |
| Medical Vocabulary | 0 | - | 4.54 | 58,466 |
| Birthstones Quiz | 0 | - | 4.41 | 80,450 |
| Citrus Fruits | 0 | - | 3.65 | 41,939 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,341 |
| Albert Einstein Trivia | 0 | - | 4.57 | 18,302 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,502 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,085 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,074 |
| Body Part Words | 0 | - | 4.43 | 145,072 |
| Animal Anatomy Quiz | 0 | - | 4.38 | 59,610 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,691 |
| Three Letter Body Parts | 0 | - | 4.39 | 204,774 |
| Human Body A-Z | 0 | - | 4.51 | 128,178 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,604 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,034 |
| Medical Specialties | 0 | - | 4.29 | 90,833 |
| The Diseases They Had | 0 | - | 4.15 | 13,875 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,438 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,609 |
| The Pluto Quiz | 0 | - | 4.60 | 9,769 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,168 |
| Astronomy Decoder | 0 | - | 4.50 | 37,807 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,377 |
| The Mars Quiz | 0 | - | 4.54 | 18,570 |
| The Saturn Quiz | 0 | - | 4.54 | 11,493 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,615 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,250 |
| Name the Constellations | 0 | - | 4.58 | 44,618 |
| Astronomy True or False | 0 | - | 4.38 | 36,236 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,391 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,466 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,016 |
| The Venus Quiz | 0 | - | 4.19 | 6,881 |
| U.S. States with Glaciers | 0 | - | 4.61 | 24,980 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 34,996 |
| Elements Named for Countries | 0 | - | 4.52 | 24,341 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,624 |
| Animals by Skeleton Image | 0 | - | 4.80 | 45,910 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,337 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,292 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,802 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,749 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,519 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,093 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,185 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,441 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,749 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,673 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,032 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,320 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,546 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,372 |
| Least-Forested Countries | 0 | - | 4.53 | 64,861 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,139 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,136 |
| Most Forested European Countries | 0 | - | 4.80 | 74,849 |
| Least Forested European Countries | 0 | - | 4.25 | 53,755 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,378 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,650 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,290 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,668 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,408 |
| Countries with Glaciers | 0 | - | 4.97 | 104,581 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,056 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 16,970 |
