| Elements of the Periodic Table | 0 | - | 5.00 | 2,241,578 |
| Elements by Symbol | 0 | - | 4.92 | 197,177 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,645 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,200 |
| Noble Gases | 0 | - | 4.89 | 78,138 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,558 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,172 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,630 |
| Elements Whose First Letter Doesn't Match the Symbol | 0 | - | 4.88 | 17,776 |
| Elemental Words | 0 | - | 4.96 | 52,279 |
| Metals of Antiquity | 0 | - | 4.95 | 93,418 |
| First Twenty Elements - Sudden Death | 0 | - | 4.83 | 36,331 |
| Elements - Sudden Death | 0 | - | 4.91 | 130,884 |
| One Letter Periodic Table Symbols - Sudden Death | 0 | - | 4.89 | 55,457 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,997 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,707 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,501 |
| International Scientific Units | 0 | - | 4.95 | 156,771 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,751 |
| Random Symbol to Element | 0 | - | 4.88 | 93,027 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.52 | 12,167 |
| Click the Chemical Element | 0 | - | 4.96 | 80,365 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,803 |
| Name the Virus | 0 | - | 4.87 | 76,731 |
| Elements by Picture | 0 | - | 4.27 | 69,929 |
| Major Taxonomic Ranks | 0 | - | 4.55 | 80,525 |
| Famous Scientists | 0 | - | 4.57 | 42,637 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,013 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,868 |
| Name a Valid Element | 0 | - | 4.64 | 70,020 |
| Scientific Names | 0 | - | 4.32 | 78,444 |
| Name the Metal Alloy | 0 | - | 4.70 | 13,724 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,963 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,822 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,194 |
| Element... or Pokémon? | 0 | - | 4.98 | 131,672 |
| Body Parts - Sudden Death #1 | 0 | - | 4.85 | 63,173 |
| Bones - Sudden Death | 0 | - | 4.95 | 50,613 |
| Famous Effects | 0 | - | 4.62 | 12,486 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,534 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 70,681 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,665 |
| Body Part Cliches | 0 | - | 4.43 | 123,289 |
| Bones of the Human Body | 0 | - | 4.52 | 42,363 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,143 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,111 |
| Astronomy Quiz | 0 | - | 4.90 | 82,551 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,180 |
| Solar System Trivia | 0 | - | 4.93 | 46,628 |
| Click the Planet | 0 | - | 4.96 | 91,343 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,542 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,564 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,600 |
| Environmental Issues | 0 | - | 4.54 | 26,829 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 40,924 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,270 |
| Science General Knowledge #1 | 0 | - | 4.54 | 165,936 |
| Science General Knowledge #2 | 0 | - | 4.48 | 118,776 |
| Science General Knowledge #3 | 0 | - | 4.56 | 108,612 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,636 |
| Word Chain - Science | 0 | - | 4.59 | 54,867 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,692 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,097,140 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,916 |
| The Sun Quiz | 0 | - | 4.93 | 34,658 |
| First Names of Scientists | 0 | - | 4.50 | 56,837 |
| Groups of Two - Science | 0 | - | 4.26 | 48,313 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,824 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,978 |
| Science Decoder | 0 | - | 4.52 | 28,763 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,311 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,277 |
| Science True or False | 0 | - | 4.35 | 40,284 |
| Medical Acronyms | 0 | - | 4.43 | 96,822 |
| Medical Vocabulary | 0 | - | 4.54 | 59,083 |
| Birthstones by Month | 0 | - | 4.42 | 80,674 |
| Citrus Fruits | 0 | - | 3.63 | 42,070 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,123 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,387 |
| Brightest Natural Objects in the Sky | 0 | - | 4.45 | 28,292 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,807 |
| Body Part Words | 0 | - | 4.43 | 145,936 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,816 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,319 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,576 |
| Human Body A-Z | 0 | - | 4.51 | 129,153 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,153 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,240 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,652 |
| Medical Specialties | 0 | - | 4.32 | 91,759 |
| The Diseases They Had | 0 | - | 4.15 | 14,005 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.69 | 57,733 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 20,798 |
| The Pluto Quiz | 0 | - | 4.61 | 9,846 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,480 |
| Astronomy Decoder | 0 | - | 4.49 | 38,043 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,457 |
| The Mars Quiz | 0 | - | 4.55 | 18,658 |
| The Saturn Quiz | 0 | - | 4.54 | 11,554 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,561 |
| Dumb it Down Doc | 0 | - | 4.13 | 64,968 |
| Signs of the Zodiac Quiz | 0 | - | 4.45 | 225,663 |
| Name the Constellations | 0 | - | 4.58 | 44,959 |
| Astronomy True or False | 0 | - | 4.39 | 36,462 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,672 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,329 |
| The Venus Quiz | 0 | - | 4.21 | 6,922 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,276 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,384 |
| Elements Named for Countries | 0 | - | 4.53 | 24,684 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,707 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,469 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,478 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,439 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,267 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.09 | 26,349 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,709 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,152 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,633 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,618 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 59,980 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.24 | 25,807 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,512 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,648 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,527 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,629 |
| Least-Forested Countries | 0 | - | 4.53 | 65,187 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,424 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,470 |
| Most Forested European Countries | 0 | - | 4.80 | 75,304 |
| Least Forested European Countries | 0 | - | 4.25 | 54,006 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,700 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,810 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,507 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,058 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,636 |
| Countries with Glaciers | 0 | - | 4.97 | 105,394 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,143 |
| Countries with the Most Sunlight Per Square Meter | 0 | - | 4.35 | 17,246 |
