| Elements of the Periodic Table | 0 | - | 5.00 | 2,219,435 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,412 |
| Elements by Symbol | 0 | - | 4.92 | 195,430 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,608 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,078 |
| International Scientific Units | 0 | - | 4.95 | 155,270 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,572 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,533 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,693 |
| Countries with Glaciers | 0 | - | 4.97 | 104,635 |
| Element... or Pokémon? | 0 | - | 4.98 | 130,123 |
| Metals of Antiquity | 0 | - | 4.94 | 92,881 |
| Astronomy Quiz | 0 | - | 4.89 | 81,656 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,770 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,221 |
| Elemental Words | 0 | - | 4.96 | 51,973 |
| Click the Chemical Element | 0 | - | 4.96 | 79,227 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,173 |
| Click the Planet | 0 | - | 4.96 | 90,184 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,855 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,623 |
| The Sun Quiz | 0 | - | 4.93 | 34,091 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,348 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,604 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,530 |
| Three Letter Body Parts | 0 | - | 4.40 | 204,887 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,773 |
| Body Part Words | 0 | - | 4.43 | 145,198 |
| Body Part Cliches | 0 | - | 4.43 | 123,026 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,214 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,397 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,319 |
| Human Body A-Z | 0 | - | 4.51 | 128,337 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,697 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,650 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,086 |
| Body Parts - No Vowels | 0 | - | 4.15 | 25,071 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 223,475 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,598 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,018 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,166 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,173 |
| Random Symbol to Element | 0 | - | 4.88 | 92,195 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,421 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,809 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,696 |
| Noble Gases | 0 | - | 4.89 | 77,416 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,840 |
| Name the Virus | 0 | - | 4.86 | 76,222 |
| Most Forested European Countries | 0 | - | 4.80 | 74,894 |
| First Names of Scientists | 0 | - | 4.50 | 56,444 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,241 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,408 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,171 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,027 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,172 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,178 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.78 | 70,287 |
| Name a Valid Element | 0 | - | 4.64 | 69,552 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,304 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,212 |
| Famous Scientists | 0 | - | 4.57 | 42,441 |
| Name the Constellations | 0 | - | 4.58 | 44,644 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,151 |
| Medical Vocabulary | 0 | - | 4.54 | 58,515 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,072 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,486 |
| Word Chain - Science | 0 | - | 4.59 | 54,379 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,567 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,426 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,671 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,346 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,453 |
| Planets - Multiple Choice | 0 | - | 4.41 | 53,132 |
| Animals by Skeleton Image | 0 | - | 4.80 | 45,962 |
| Astronomy Decoder | 0 | - | 4.50 | 37,832 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,900 |
| Solar System Trivia | 0 | - | 4.93 | 45,988 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,350 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,063 |
| The Mars Quiz | 0 | - | 4.55 | 18,575 |
| Animals - Taxonomy to Common Name | 0 | - | 4.79 | 28,091 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,013 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,308 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,385 |
| The Saturn Quiz | 0 | - | 4.54 | 11,498 |
| The Pluto Quiz | 0 | - | 4.60 | 9,775 |
| Most Common Body Part Words | 0 | - | 3.91 | 31,511 |
| Medical Acronyms | 0 | - | 4.43 | 96,159 |
| Medical Specialties | 0 | - | 4.29 | 90,888 |
| "Ologies" Quiz | 0 | - | 4.34 | 96,372 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,654 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,368 |
| Scientific Names | 0 | - | 4.32 | 78,145 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,695 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,822 |
| Least-Forested Countries | 0 | - | 4.53 | 64,887 |
| Least Forested European Countries | 0 | - | 4.25 | 53,776 |
| Groups of Two - Science | 0 | - | 4.26 | 48,133 |
| Elements by Picture | 0 | - | 4.28 | 69,529 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,083 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,646 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,192 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,410 |
| Science True or False | 0 | - | 4.35 | 39,958 |
| Astronomy True or False | 0 | - | 4.38 | 36,259 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,846 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,327 |
| Science Decoder | 0 | - | 4.52 | 28,646 |
| Environmental Issues | 0 | - | 4.54 | 26,717 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,153 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,304 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.12 | 22,757 |
| Science Multiple Choice #3 | 0 | - | 4.38 | 34,361 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,626 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 27,692 |
| The Diseases They Had | 0 | - | 4.15 | 13,884 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,630 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,676 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,061 |
| The Venus Quiz | 0 | - | 4.21 | 6,887 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,099 |
| Citrus Fruits | 0 | - | 3.65 | 41,945 |
