Leaderboard
10,033 things · 153 votes cast · add yours
All | Arts | Biology and health sciences | Everyday life | Geography | History | Mathematics | People | Philosophy and religion | Physical sciences | Society and social sciences | Technology
| # | Thing | Description | Topic | For | Against | Net | |
|---|---|---|---|---|---|---|---|
| 151 | Abstract machine | Theoretical computer used for defining a model of computation | Mathematics | 0 | 0 | 0 | |
| 152 | Abstraction | Process of generalization | Philosophy and religion | 0 | 0 | 0 | |
| 153 |  | Abu Bakr | Rashidun caliph from 632 to 634 | People | 0 | 0 | 0 |
| 154 |  | Abu Bakr al-Razi | 10th-century Iranian physician and polymath | People | 0 | 0 | 0 |
| 155 |  | Abu Dhabi | Capital city of the United Arab Emirates | Geography | 0 | 0 | 0 |
| 156 |  | Abu Hanifa | Muslim scholar, jurist, and theologian (699–767) | People | 0 | 0 | 0 |
| 157 |  | Abu Muslim | 8th-century Persian revolutionary | People | 0 | 0 | 0 |
| 158 |  | Abu Nuwas | 8th-century classical Arabic poet | People | 0 | 0 | 0 |
| 159 |  | Abuja | Capital of the Federal Republic of Nigeria | Geography | 0 | 0 | 0 |
| 160 |  | Abyssal plain | Flat area on the deep ocean floor | Physical sciences | 0 | 0 | 0 |
| 161 |  | Academic art | Style of painting and sculpture | Arts | 0 | 0 | 0 |
| 162 | Academic degree | College or university diploma | Society and social sciences | 0 | 0 | 0 | |
| 163 |  | Academic journal | Peer-reviewed scholarly periodical | Society and social sciences | 0 | 0 | 0 |
| 164 | Academy Awards | Annual awards for cinematic achievements | Arts | 0 | 0 | 0 | |
| 165 |  | Acanthodii | Extinct paraphyletic class of fishes | Biology and health sciences | 0 | 0 | 0 |
| 166 |  | Acceleration | Rate of change of velocity | Physical sciences | 0 | 0 | 0 |
| 167 | Accent (sociolinguistics) | Distinctive way of pronouncing a language | Society and social sciences | 0 | 0 | 0 | |
| 168 |  | Accipiter | Genus of birds | Biology and health sciences | 0 | 0 | 0 |
| 169 |  | Accordion | Bellows-driven free-reed aerophone musical instrument | Arts | 0 | 0 | 0 |
| 170 | Accounting | Recording economic information | Society and social sciences | 0 | 0 | 0 | |
| 171 |  | Accra | Capital and the largest city of Ghana | Geography | 0 | 0 | 0 |
| 172 |  | Accuracy and precision | Measures of observational error | Physical sciences | 0 | 0 | 0 |
| 173 |  | Aceh | Autonomous province in Sumatra, Indonesia | Geography | 0 | 0 | 0 |
| 174 |  | Acetic acid | Chemical acid found in vinegar | Physical sciences | 0 | 0 | 0 |
| 175 |  | Acetone | Organic compound ((CH3)2CO); simplest ketone | Physical sciences | 0 | 0 | 0 |
| 176 |  | Achaemenid Empire | Ancient Iranian empire, 550–330 BC | History | 0 | 0 | 0 |
| 177 |  | Achilles | Greek mythological hero | Philosophy and religion | 0 | 0 | 0 |
| 178 |  | Acid | Chemical compound giving a proton or accepting an electron pair | Physical sciences | 0 | 0 | 0 |
| 179 |  | Acid rain | Rain that is unusually acidic | Physical sciences | 0 | 0 | 0 |
| 180 |  | Acid–base reaction | Chemical reaction between an acid and a base | Physical sciences | 0 | 0 | 0 |
| 181 |  | Acne | Skin condition characterized by pimples | Biology and health sciences | 0 | 0 | 0 |
| 182 |  | Aconcagua | Highest mountain in the Americas | Geography | 0 | 0 | 0 |
| 183 |  | Acoustics | Branch of physics involving mechanical waves | Physical sciences | 0 | 0 | 0 |
| 184 |  | Acre | Unit of area | Physical sciences | 0 | 0 | 0 |
| 185 |  | Acrobatics | Feats of balance and agility | Arts | 0 | 0 | 0 |
| 186 |  | Acropolis of Athens | Ancient citadel above the city of Athens | Arts | 0 | 0 | 0 |
| 187 | Acting | Storytelling by enacting a character | Arts | 0 | 0 | 0 | |
| 188 |  | Actinide | F-block chemical elements | Physical sciences | 0 | 0 | 0 |
| 189 |  | Actinium | Chemical element with atomic number 89 (Ac) | Physical sciences | 0 | 0 | 0 |
| 190 |  | Actinopterygii | Class of ray-finned bony fishes | Biology and health sciences | 0 | 0 | 0 |
| 191 |  | Action figure | Character toy figurine made commonly of plastic | Everyday life | 0 | 0 | 0 |
| 192 |  | Action film | Film genre | Arts | 0 | 0 | 0 |
| 193 | Active galactic nucleus | Compact region at a galaxy's center with abnormally high luminosity | Physical sciences | 0 | 0 | 0 | |
| 194 | Active transport | Cellular molecule transport mechanism against the concentration gradient | Biology and health sciences | 0 | 0 | 0 | |
| 195 |  | Activism | Efforts to make change in society toward a perceived greater good | Society and social sciences | 0 | 0 | 0 |
| 196 | Actor | Person who portrays a character in a production | Arts | 0 | 0 | 0 | |
| 197 |  | Acupuncture | Pseudoscientific needling treatment | Biology and health sciences | 0 | 0 | 0 |
| 198 |  | Ada Lovelace | English mathematician (1815–1852) | People | 0 | 0 | 0 |
| 199 |  | Adam Mickiewicz | PoIish writer and activist (1798–1855) | People | 0 | 0 | 0 |
| 200 |  | Adam Smith | Scottish economist and philosopher (1723–1790) | People | 0 | 0 | 0 |
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