| International Scientific Units | 0 | - | 4.95 | 158,397 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,356 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,261,712 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 81,165 |
| Famous Scientists | 0 | - | 4.58 | 42,861 |
| Elements by Symbol | 0 | - | 4.92 | 198,816 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,631 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,823 |
| Noble Gases | 0 | - | 4.89 | 78,873 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 65,111 |
| Periodic Table Symbols | 0 | - | 4.97 | 80,883 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 82,461 |
| Name the Virus | 0 | - | 4.87 | 77,139 |
| Scientific Names | 0 | - | 4.32 | 78,741 |
| Famous Effects | 0 | - | 4.59 | 12,848 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 18,826 |
| Body Parts - Sudden Death #1 | 0 | - | 4.86 | 67,010 |
| Bones - Sudden Death | 0 | - | 4.95 | 53,750 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 38,073 |
| Elements - Sudden Death | 0 | - | 4.92 | 136,058 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,163 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,300 |
| Elemental Words | 0 | - | 4.97 | 52,575 |
| Metals of Antiquity | 0 | - | 4.95 | 93,960 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 57,265 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,999 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,510 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,101 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,811 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,848 |
| Body Part Cliches | 0 | - | 4.44 | 123,674 |
| Bones of the Human Body | 0 | - | 4.51 | 43,630 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,935 |
| Click the Planet | 0 | - | 4.96 | 92,282 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,675 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.46 | 12,331 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,768 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,848 |
| Random Symbol to Element | 0 | - | 4.88 | 94,088 |
| Astronomy Quiz | 0 | - | 4.90 | 83,338 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 138,536 |
| Solar System Trivia | 0 | - | 4.93 | 47,210 |
| Environmental Issues | 0 | - | 4.54 | 26,914 |
| Body Parts - Sudden Death #2 | 0 | - | 4.78 | 46,413 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,454 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,451 |
| Science General Knowledge #1 | 0 | - | 4.54 | 167,415 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,709 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,631 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,982 |
| Word Chain - Science | 0 | - | 4.59 | 55,170 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,967 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,515 |
| Click the Chemical Element | 0 | - | 4.96 | 81,414 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,102,821 |
| Groups of Two - Science | 0 | - | 4.26 | 48,472 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,211 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,247 |
| Science Decoder | 0 | - | 4.52 | 28,862 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,522 |
| Science True or False | 0 | - | 4.35 | 40,526 |
| Elements by Picture | 0 | - | 4.27 | 70,340 |
| First Names of Scientists | 0 | - | 4.51 | 57,237 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,212 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 103,532 |
| Name a Valid Element | 0 | - | 4.68 | 70,427 |
| Name the Constellations - With a Map | 0 | - | 4.91 | 36,234 |
| The Sun Quiz | 0 | - | 4.93 | 35,131 |
| Medical Acronyms | 0 | - | 4.43 | 97,282 |
| Medical Vocabulary | 0 | - | 4.54 | 59,502 |
| Citrus Fruits | 0 | - | 3.67 | 42,206 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,832 |
| The Diseases They Had | 0 | - | 4.15 | 14,074 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,966 |
| Birthstones by Month | 0 | - | 4.44 | 88,168 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,581 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,479 |
| Name the Metal Alloy | 0 | - | 4.73 | 14,073 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,977 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,333 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,648 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,424 |
| Body Part Words | 0 | - | 4.43 | 146,418 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,961 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 177,108 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,923 |
| Human Body A-Z | 0 | - | 4.51 | 130,078 |
| One-Syllable Human Body Parts | 0 | - | 4.30 | 88,559 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,954 |
| Medical Specialties | 0 | - | 4.33 | 92,334 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,265 |
| Element... or Pokémon? | 0 | - | 4.98 | 133,046 |
| The Pluto Quiz | 0 | - | 4.61 | 9,938 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,768 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,979 |
| Category Elimination - Elements | 0 | - | 4.61 | 54,140 |
| Astronomy Decoder | 0 | - | 4.48 | 38,238 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,533 |
| The Mars Quiz | 0 | - | 4.55 | 18,740 |
| The Saturn Quiz | 0 | - | 4.54 | 11,598 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,851 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,581 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,194 |
| Signs of the Zodiac Quiz | 0 | - | 4.46 | 227,808 |
| Name the Constellations | 0 | - | 4.63 | 48,283 |
| Astronomy True or False | 0 | - | 4.39 | 36,618 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 216,494 |
| The Venus Quiz | 0 | - | 4.21 | 6,968 |
| Countries with Glaciers | 0 | - | 4.97 | 105,835 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,197 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,530 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,701 |
| Elements Named for Countries | 0 | - | 4.52 | 24,986 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,775 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,981 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,604 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,540 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,565 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.10 | 26,934 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.98 | 110,033 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,198 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,988 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,743 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,191 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.25 | 25,924 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,875 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,913 |
| Countries with the Most Forest | 0 | - | 4.87 | 148,141 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,773 |
| Least-Forested Countries | 0 | - | 4.53 | 65,432 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,659 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,732 |
| Most Forested European Countries | 0 | - | 4.80 | 75,700 |
| Least Forested European Countries | 0 | - | 4.25 | 54,202 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,945 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.63 | 37,958 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,688 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,360 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,797 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,476 |
