| International Scientific Units | 0 | - | 4.95 | 158,566 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,399 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,264,043 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 81,283 |
| Famous Scientists | 0 | - | 4.58 | 42,885 |
| Elements by Symbol | 0 | - | 4.92 | 199,094 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,755 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,908 |
| Noble Gases | 0 | - | 4.89 | 78,968 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 65,185 |
| Periodic Table Symbols | 0 | - | 4.97 | 81,210 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 82,548 |
| Name the Virus | 0 | - | 4.87 | 77,191 |
| Famous Effects | 0 | - | 4.59 | 12,890 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.87 | 18,944 |
| Scientific Names | 0 | - | 4.32 | 78,772 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.88 | 57,504 |
| Body Parts - Sudden Death #1 | 0 | - | 4.86 | 67,255 |
| Bones - Sudden Death | 0 | - | 4.95 | 53,935 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 38,236 |
| Elements - Sudden Death | 0 | - | 4.92 | 136,737 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,168 |
| Things Named For People #3 - Science | 0 | - | 4.86 | 54,345 |
| Elemental Words | 0 | - | 4.97 | 52,612 |
| Metals of Antiquity | 0 | - | 4.95 | 94,037 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 87,083 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,550 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,114 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,959 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,882 |
| Body Part Cliches | 0 | - | 4.44 | 123,702 |
| Bones of the Human Body | 0 | - | 4.51 | 43,770 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,999 |
| Click the Planet | 0 | - | 4.96 | 92,408 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,695 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.46 | 12,358 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,798 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,883 |
| Random Symbol to Element | 0 | - | 4.88 | 94,215 |
| Astronomy Quiz | 0 | - | 4.90 | 83,431 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 138,751 |
| Solar System Trivia | 0 | - | 4.93 | 47,290 |
| Environmental Issues | 0 | - | 4.54 | 26,925 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,523 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,477 |
| Body Parts - Sudden Death #2 | 0 | - | 4.78 | 46,722 |
| Science General Knowledge #1 | 0 | - | 4.54 | 167,603 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,817 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,732 |
| Science Vocabulary #2 | 0 | - | 4.52 | 60,033 |
| Word Chain - Science | 0 | - | 4.59 | 55,211 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 39,006 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,606 |
| Click the Chemical Element | 0 | - | 4.96 | 81,593 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,103,829 |
| Groups of Two - Science | 0 | - | 4.26 | 48,491 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,263 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,277 |
| Science Decoder | 0 | - | 4.52 | 28,875 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,556 |
| Science True or False | 0 | - | 4.35 | 40,569 |
| Elements by Picture | 0 | - | 4.27 | 70,404 |
| First Names of Scientists | 0 | - | 4.51 | 57,292 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,239 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,606 |
| Name a Valid Element | 0 | - | 4.68 | 70,492 |
| Name the Constellations - With a Map | 0 | - | 4.91 | 36,271 |
| The Sun Quiz | 0 | - | 4.93 | 35,206 |
| Medical Acronyms | 0 | - | 4.43 | 97,328 |
| Medical Vocabulary | 0 | - | 4.54 | 59,556 |
| Citrus Fruits | 0 | - | 3.67 | 42,220 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,848 |
| The Diseases They Had | 0 | - | 4.15 | 14,083 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 21,006 |
| Birthstones by Month | 0 | - | 4.44 | 88,250 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,654 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,486 |
| Name the Metal Alloy | 0 | - | 4.73 | 14,133 |
| Answers are Elements #1 | 0 | - | 4.29 | 53,008 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,343 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,694 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,504 |
| Body Part Words | 0 | - | 4.43 | 146,487 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,982 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 177,171 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,968 |
| Human Body A-Z | 0 | - | 4.51 | 130,157 |
| One-Syllable Human Body Parts | 0 | - | 4.30 | 88,611 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 120,050 |
| Medical Specialties | 0 | - | 4.33 | 92,368 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,311 |
| Element... or Pokémon? | 0 | - | 4.98 | 133,218 |
| The Pluto Quiz | 0 | - | 4.61 | 9,946 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,824 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 71,020 |
| Category Elimination - Elements | 0 | - | 4.61 | 54,217 |
| Astronomy Decoder | 0 | - | 4.48 | 38,267 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,548 |
| The Mars Quiz | 0 | - | 4.55 | 18,747 |
| The Saturn Quiz | 0 | - | 4.54 | 11,602 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,896 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,619 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,219 |
| Signs of the Zodiac Quiz | 0 | - | 4.46 | 228,090 |
| Name the Constellations | 0 | - | 4.63 | 48,480 |
| Astronomy True or False | 0 | - | 4.39 | 36,640 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 216,580 |
| The Venus Quiz | 0 | - | 4.21 | 6,975 |
| Countries with Glaciers | 0 | - | 4.97 | 105,901 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,202 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,507 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,573 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,751 |
| Elements Named for Countries | 0 | - | 4.52 | 25,040 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,781 |
| Animals by Skeleton Image | 0 | - | 4.81 | 47,061 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,618 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,554 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,628 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.10 | 27,017 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 110,054 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,210 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 65,058 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,760 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,228 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.25 | 25,937 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,944 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,963 |
| Countries with the Most Forest | 0 | - | 4.88 | 148,313 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,793 |
| Least-Forested Countries | 0 | - | 4.53 | 65,466 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,700 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,783 |
| Most Forested European Countries | 0 | - | 4.80 | 75,754 |
| Least Forested European Countries | 0 | - | 4.25 | 54,231 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,988 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.63 | 37,979 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,711 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,404 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,824 |
