| International Scientific Units | 0 | - | 4.95 | 156,577 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,686 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,238,280 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,432 |
| Famous Scientists | 0 | - | 4.57 | 42,611 |
| Elements by Symbol | 0 | - | 4.92 | 196,901 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,512 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,132 |
| Noble Gases | 0 | - | 4.89 | 78,057 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,491 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,977 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,530 |
| Name the Virus | 0 | - | 4.87 | 76,680 |
| Scientific Names | 0 | - | 4.32 | 78,388 |
| Famous Effects | 0 | - | 4.62 | 12,431 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 17,636 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,109 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,901 |
| Elemental Words | 0 | - | 4.96 | 52,231 |
| Metals of Antiquity | 0 | - | 4.95 | 93,341 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 62,871 |
| Bones - Sudden Death | 0 | - | 4.95 | 50,379 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 36,119 |
| Elements - Sudden Death | 0 | - | 4.91 | 130,012 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 55,213 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,473 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,988 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,522 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,446 |
| Body Part Cliches | 0 | - | 4.43 | 123,264 |
| Bones of the Human Body | 0 | - | 4.52 | 42,159 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,084 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,525 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,140 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,524 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,568 |
| Random Symbol to Element | 0 | - | 4.88 | 92,948 |
| Astronomy Quiz | 0 | - | 4.90 | 82,431 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,968 |
| Solar System Trivia | 0 | - | 4.93 | 46,523 |
| Environmental Issues | 0 | - | 4.54 | 26,816 |
| Click the Planet | 0 | - | 4.96 | 91,126 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,817 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,256 |
| Science General Knowledge #1 | 0 | - | 4.54 | 165,705 |
| Science General Knowledge #2 | 0 | - | 4.48 | 118,598 |
| Science General Knowledge #3 | 0 | - | 4.56 | 108,093 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,576 |
| Word Chain - Science | 0 | - | 4.59 | 54,830 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,655 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,687 |
| Click the Chemical Element | 0 | - | 4.96 | 80,181 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,096,097 |
| Groups of Two - Science | 0 | - | 4.26 | 48,288 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,747 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,914 |
| Science Decoder | 0 | - | 4.52 | 28,743 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,289 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,246 |
| Science True or False | 0 | - | 4.35 | 40,256 |
| Elements by Picture | 0 | - | 4.27 | 69,864 |
| First Names of Scientists | 0 | - | 4.50 | 56,751 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,984 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,762 |
| Name a Valid Element | 0 | - | 4.64 | 69,955 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,876 |
| The Sun Quiz | 0 | - | 4.93 | 34,554 |
| Medical Acronyms | 0 | - | 4.43 | 96,755 |
| Medical Vocabulary | 0 | - | 4.54 | 59,036 |
| Citrus Fruits | 0 | - | 3.63 | 42,054 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,629 |
| The Diseases They Had | 0 | - | 4.15 | 13,990 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,762 |
| Birthstones by Month | 0 | - | 4.41 | 80,625 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,630 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,372 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,657 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,805 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,183 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 28,210 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,692 |
| Body Part Words | 0 | - | 4.43 | 145,886 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,793 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,240 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,523 |
| Human Body A-Z | 0 | - | 4.51 | 129,073 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,093 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,137 |
| Medical Specialties | 0 | - | 4.32 | 91,702 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.69 | 57,614 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,449 |
| The Pluto Quiz | 0 | - | 4.61 | 9,831 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,430 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,635 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,609 |
| Astronomy Decoder | 0 | - | 4.50 | 38,012 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,444 |
| The Mars Quiz | 0 | - | 4.55 | 18,640 |
| The Saturn Quiz | 0 | - | 4.54 | 11,545 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,501 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,290 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,941 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 225,346 |
| Name the Constellations | 0 | - | 4.58 | 44,919 |
| Astronomy True or False | 0 | - | 4.39 | 36,422 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,572 |
| The Venus Quiz | 0 | - | 4.21 | 6,915 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,244 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,349 |
| Elements Named for Countries | 0 | - | 4.52 | 24,648 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,697 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,380 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,458 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,421 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,218 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,166 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,688 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,145 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,575 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,594 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,951 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,793 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,421 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,601 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,438 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,603 |
| Least-Forested Countries | 0 | - | 4.53 | 65,151 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,385 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,429 |
| Most Forested European Countries | 0 | - | 4.80 | 75,257 |
| Least Forested European Countries | 0 | - | 4.25 | 53,978 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,657 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,785 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,486 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 81,999 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,605 |
| Countries with Glaciers | 0 | - | 4.97 | 105,325 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,136 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,222 |
