| International Scientific Units | 0 | - | 4.95 | 158,644 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,421 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,265,245 |
| Elements by Symbol | 0 | - | 4.92 | 199,174 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,807 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,936 |
| Noble Gases | 0 | - | 4.89 | 79,013 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 65,213 |
| Periodic Table Symbols | 0 | - | 4.97 | 81,334 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 82,593 |
| Name the Virus | 0 | - | 4.87 | 77,211 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,564 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 81,328 |
| Famous Scientists | 0 | - | 4.58 | 42,891 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 18,996 |
| Scientific Names | 0 | - | 4.32 | 78,777 |
| Things Named For People #3 - Science | 0 | - | 4.86 | 54,362 |
| Elemental Words | 0 | - | 4.97 | 52,627 |
| Metals of Antiquity | 0 | - | 4.95 | 94,069 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 57,569 |
| Famous Effects | 0 | - | 4.59 | 12,911 |
| Body Parts - Sudden Death #1 | 0 | - | 4.86 | 67,358 |
| Bones - Sudden Death | 0 | - | 4.95 | 54,036 |
| First Twenty Elements - Sudden Death | 0 | - | 4.84 | 38,300 |
| Elements - Sudden Death | 0 | - | 4.92 | 137,011 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 87,107 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,559 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,122 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,988 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,898 |
| Body Part Cliches | 0 | - | 4.44 | 123,716 |
| Bones of the Human Body | 0 | - | 4.51 | 43,815 |
| Medical Conditions Quiz | 0 | - | 4.78 | 125,020 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,171 |
| Random Symbol to Element | 0 | - | 4.88 | 94,271 |
| Astronomy Quiz | 0 | - | 4.90 | 83,488 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 138,860 |
| Solar System Trivia | 0 | - | 4.93 | 47,323 |
| Click the Planet | 0 | - | 4.96 | 92,464 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.46 | 12,365 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,808 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,891 |
| Environmental Issues | 0 | - | 4.54 | 26,928 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,561 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,487 |
| Science General Knowledge #1 | 0 | - | 4.54 | 167,681 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,866 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,824 |
| Science Vocabulary #2 | 0 | - | 4.52 | 60,045 |
| Word Chain - Science | 0 | - | 4.59 | 55,225 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 39,024 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,626 |
| Click the Chemical Element | 0 | - | 4.96 | 81,638 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,104,208 |
| Body Parts - Sudden Death #2 | 0 | - | 4.78 | 46,873 |
| Name the Constellations - With a Map | 0 | - | 4.91 | 36,282 |
| The Sun Quiz | 0 | - | 4.93 | 35,236 |
| First Names of Scientists | 0 | - | 4.51 | 57,305 |
| Groups of Two - Science | 0 | - | 4.26 | 48,500 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,280 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,287 |
| Science Decoder | 0 | - | 4.52 | 28,879 |
| Science True or False | 0 | - | 4.35 | 40,597 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,251 |
| Elements by Picture | 0 | - | 4.27 | 70,426 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,651 |
| Name a Valid Element | 0 | - | 4.68 | 70,513 |
| Medical Acronyms | 0 | - | 4.43 | 97,354 |
| Medical Vocabulary | 0 | - | 4.54 | 59,577 |
| Birthstones by Month | 0 | - | 4.44 | 88,282 |
| Citrus Fruits | 0 | - | 3.67 | 42,226 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,671 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,487 |
| Name the Metal Alloy | 0 | - | 4.73 | 14,152 |
| Answers are Elements #1 | 0 | - | 4.29 | 53,022 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,350 |
| Element... or Pokémon? | 0 | - | 4.98 | 133,299 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,718 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,536 |
| Body Part Words | 0 | - | 4.43 | 146,511 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,987 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 177,287 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,994 |
| Human Body A-Z | 0 | - | 4.51 | 130,201 |
| One-Syllable Human Body Parts | 0 | - | 4.30 | 88,627 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 120,256 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,856 |
| Medical Specialties | 0 | - | 4.33 | 92,386 |
| The Diseases They Had | 0 | - | 4.15 | 14,089 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,337 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 21,019 |
| The Pluto Quiz | 0 | - | 4.61 | 9,951 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,838 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 71,040 |
| Category Elimination - Elements | 0 | - | 4.61 | 54,234 |
| Astronomy Decoder | 0 | - | 4.48 | 38,277 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,551 |
| The Mars Quiz | 0 | - | 4.55 | 18,751 |
| The Saturn Quiz | 0 | - | 4.54 | 11,604 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,921 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,224 |
| Signs of the Zodiac Quiz | 0 | - | 4.46 | 228,183 |
| Name the Constellations | 0 | - | 4.63 | 48,522 |
| Astronomy True or False | 0 | - | 4.39 | 36,646 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 216,624 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,629 |
| The Venus Quiz | 0 | - | 4.21 | 6,976 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,590 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,769 |
| Elements Named for Countries | 0 | - | 4.52 | 25,061 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,785 |
| Animals by Skeleton Image | 0 | - | 4.81 | 47,091 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,627 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,563 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,653 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.10 | 27,044 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 110,062 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,213 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 65,076 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,772 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,245 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.25 | 25,945 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,973 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,978 |
| Countries with the Most Forest | 0 | - | 4.88 | 148,339 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,803 |
| Least-Forested Countries | 0 | - | 4.53 | 65,488 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,718 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,801 |
| Most Forested European Countries | 0 | - | 4.80 | 75,774 |
| Least Forested European Countries | 0 | - | 4.25 | 54,244 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 65,003 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.63 | 37,988 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,720 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,430 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,834 |
| Countries with Glaciers | 0 | - | 4.97 | 105,928 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,205 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,520 |
