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10,033 things · 1,900 votes cast · cast a vote
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 | Up/Down/Net | Score ▼ | |
|---|---|---|---|---|---|---|
| 251 |  | Capella | Brightest star in the constellation Auriga | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 252 |  | Carbon dioxide | Carbon-oxygen gas | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 253 |  | Carbon monoxide | Poisonous gas consisting of carbon and oxygen | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 254 |  | Carbon nanotube | Allotropes of carbon with a cylindrical nanostructure | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 255 |  | Carbonate | Salt or ester of carbonic acid | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 256 |  | Carboxylic acid | Organic compound containing a –C(=O)OH group | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 257 |  | Carina Nebula | Interstellar clouds in the constellation Carina | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 258 |  | Cassiopeia (constellation) | Constellation in the northern celestial hemisphere | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 259 |  | Cast iron | Iron-carbon alloy | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 260 |  | Catalysis | Process of increasing the rate of a chemical reaction | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 261 |  | Cave | Natural void under a planetary surface | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 262 | Celestial mechanics | Branch of astronomy | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 263 |  | Celestial sphere | Conceptual tool in astronomy | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 264 |  | Centaurus | Constellation in the southern celestial hemisphere | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 265 |  | Centaurus A | Radio galaxy in the constellation Centaurus | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 266 |  | Cepheid variable | Type of variable star that pulsates radially | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 267 |  | Ceres (dwarf planet) | Dwarf planet in the asteroid belt | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 268 |  | Chemical bond | Association of atoms to form chemical compounds | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 269 | Chemical equation | Symbolic representation of a chemical reaction | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 270 | Chemical equilibrium | When the ratio of reactants to products of a chemical reaction is constant with time | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 271 | Chemical formula | Compact notation for chemical compounds | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 272 |  | Chemical kinetics | Study of the rates of chemical reactions | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 273 |  | Chemical reaction | Process that leads to chemical changes | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 274 | Chemical synthesis | Planned series of chemical reactions to produce desired product(s) | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 275 |  | Chemistry | Scientific study of matter's behavior and properties | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 276 | Chloride | Main anion present in sea water | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 277 |  | Chlorine | Chemical element with atomic number 17 (Cl) | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 278 | Chromatography | Set of laboratory techniques for separation of mixtures | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 279 |  | Chromium | Chemical element with atomic number 24 (Cr) | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 280 |  | Cirrus cloud | Genus of atmospheric cloud | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 281 |  | Citric acid | Weak organic acid | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 282 |  | Classical mechanics | Description of large objects' physics | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 283 |  | Clay | Fine grained natural soil | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 284 |  | Cliff | Tall, near vertical rock face | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 285 |  | Climate | Long-term weather pattern of a region | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 286 |  | Climate change | Human-caused changes to climate on Earth | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 287 | | Climate variability and change | Change in the statistical distribution of climate elements for an extended period | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 288 |  | Climatology | Scientific study of climate | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 289 |  | Cloud | Visible mass of particles suspended in the atmosphere | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 290 |  | Cloud chamber | Particle detector for visualizing ionizing radiation | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 291 |  | Cobalt | Chemical element with atomic number 27 (Co) | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 292 |  | Color | Perception caused by wavelengths of light | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 293 |  | Color theory | Principles to describe the practical behavior of colors | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 294 |  | Comet | Natural object in space that releases gas | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 295 |  | Condensation | Change of state of matter from a gas phase into a liquid phase | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 296 |  | Condensed matter physics | Branch of physics | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 297 |  | Conglomerate (geology) | Sedimentary rock composed of smaller rock fragments | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 298 | Conservation of energy | Law of physics and chemistry | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 299 | Conservation of mass | Scientific law that a closed system's mass remains constant | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 300 |  | Constellation | Group of stars on the celestial sphere | Physical sciences | +0 / -0 / 0 | 0.500000 |
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