| International Scientific Units | 0 | - | 4.95 | 156,115 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,502 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,232,618 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,215 |
| Elements by Symbol | 0 | - | 4.92 | 196,450 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,218 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,760 |
| Noble Gases | 0 | - | 4.89 | 77,843 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,335 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,648 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,284 |
| Name the Virus | 0 | - | 4.86 | 76,561 |
| Scientific Names | 0 | - | 4.32 | 78,312 |
| Famous Effects | 0 | - | 4.62 | 12,326 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 17,371 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,095 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,802 |
| Elemental Words | 0 | - | 4.96 | 52,161 |
| Metals of Antiquity | 0 | - | 4.94 | 93,184 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 62,312 |
| Bones - Sudden Death | 0 | - | 4.95 | 49,953 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 35,706 |
| Elements - Sudden Death | 0 | - | 4.91 | 128,694 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 54,725 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,287 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,960 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,008 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,373 |
| Body Part Cliches | 0 | - | 4.43 | 123,208 |
| Bones of the Human Body | 0 | - | 4.52 | 41,742 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,896 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,488 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,101 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,433 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,498 |
| Random Symbol to Element | 0 | - | 4.88 | 92,614 |
| Astronomy Quiz | 0 | - | 4.90 | 82,198 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,546 |
| Solar System Trivia | 0 | - | 4.93 | 46,372 |
| Environmental Issues | 0 | - | 4.54 | 26,782 |
| Click the Planet | 0 | - | 4.96 | 90,831 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,457 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,221 |
| Science General Knowledge #1 | 0 | - | 4.54 | 164,239 |
| Science General Knowledge #2 | 0 | - | 4.48 | 117,298 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,774 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,438 |
| Word Chain - Science | 0 | - | 4.59 | 54,649 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,578 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,225 |
| Click the Chemical Element | 0 | - | 4.96 | 79,889 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,094,344 |
| Groups of Two - Science | 0 | - | 4.26 | 48,225 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,593 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,804 |
| Science Decoder | 0 | - | 4.52 | 28,696 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,240 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,203 |
| Science True or False | 0 | - | 4.35 | 40,162 |
| Elements by Picture | 0 | - | 4.27 | 69,766 |
| First Names of Scientists | 0 | - | 4.50 | 56,672 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,921 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,571 |
| Name a Valid Element | 0 | - | 4.64 | 69,815 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,810 |
| The Sun Quiz | 0 | - | 4.93 | 34,383 |
| Medical Acronyms | 0 | - | 4.43 | 96,608 |
| Medical Vocabulary | 0 | - | 4.54 | 58,914 |
| Citrus Fruits | 0 | - | 3.63 | 42,007 |
| The Diseases They Had | 0 | - | 4.15 | 13,966 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,724 |
| Birthstones by Month | 0 | - | 4.41 | 80,576 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,531 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,346 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,538 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,766 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,153 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 28,081 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,519 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,389 |
| Body Part Words | 0 | - | 4.43 | 145,767 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,748 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,103 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,456 |
| Human Body A-Z | 0 | - | 4.51 | 128,924 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,972 |
| Organs of the Human Body (with map) | 0 | - | 4.11 | 118,930 |
| Medical Specialties | 0 | - | 4.32 | 91,223 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 57,384 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,067 |
| The Pluto Quiz | 0 | - | 4.61 | 9,811 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,355 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,543 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,479 |
| Astronomy Decoder | 0 | - | 4.50 | 37,952 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,425 |
| The Mars Quiz | 0 | - | 4.55 | 18,619 |
| The Saturn Quiz | 0 | - | 4.54 | 11,533 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,598 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,227 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,873 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 224,823 |
| Name the Constellations | 0 | - | 4.58 | 44,865 |
| Astronomy True or False | 0 | - | 4.39 | 36,370 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,361 |
| The Venus Quiz | 0 | - | 4.21 | 6,904 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,169 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,239 |
| Elements Named for Countries | 0 | - | 4.52 | 24,575 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,682 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,228 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,416 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,397 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,108 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 25,632 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,624 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,136 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,444 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,550 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,890 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,750 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,319 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,503 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,931 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,550 |
| Least-Forested Countries | 0 | - | 4.53 | 65,064 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,312 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,360 |
| Most Forested European Countries | 0 | - | 4.80 | 75,152 |
| Least Forested European Countries | 0 | - | 4.25 | 53,912 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,585 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,746 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,429 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 81,905 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,539 |
| Countries with Glaciers | 0 | - | 4.97 | 104,903 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,112 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,164 |
