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| # | Thing | Description | Topic | For | Against | Net | |
|---|---|---|---|---|---|---|---|
| 301 |  | Electric current | Flow of electric charge | Physical sciences | 0 | 0 | 0 |
| 302 |  | Electric field | Physical field surrounding an electric charge | Physical sciences | 0 | 0 | 0 |
| 303 |  | Electric potential | Line integral of the electric field | Physical sciences | 0 | 0 | 0 |
| 304 | | Electrical impedance | Opposition of a circuit to a current when a voltage is applied | Physical sciences | 0 | 0 | 0 |
| 305 | | Electrical resistance and conductance | Opposition to the passage of an electric current | Physical sciences | 0 | 0 | 0 |
| 306 |  | Electricity | Phenomena related to electric charge | Physical sciences | 0 | 0 | 0 |
| 307 |  | Electrochemistry | Branch of physical chemistry | Physical sciences | 0 | 0 | 0 |
| 308 |  | Electrolysis | Technique in chemistry and manufacturing | Physical sciences | 0 | 0 | 0 |
| 309 |  | Electromagnet | Magnet that creates a magnetic field through an electric current | Physical sciences | 0 | 0 | 0 |
| 310 | | Electromagnetic field | Electric and magnetic fields produced by moving charged objects | Physical sciences | 0 | 0 | 0 |
| 311 |  | Electromagnetic induction | Production of voltage by a varying magnetic field | Physical sciences | 0 | 0 | 0 |
| 312 | | Electromagnetic radiation | Physical model of propagating energy | Physical sciences | 0 | 0 | 0 |
| 313 |  | Electromagnetic spectrum | Full range of electromagnetic radiation frequencies | Physical sciences | 0 | 0 | 0 |
| 314 | | Electromagnetism | Fundamental interaction between charged particles | Physical sciences | 0 | 0 | 0 |
| 315 | | Electromotive force | Electrical action produced by a non-electrical source | Physical sciences | 0 | 0 | 0 |
| 316 |  | Electron | Elementary particle with negative charge | Physical sciences | 0 | 0 | 0 |
| 317 |  | Electron configuration | Mode of arrangement of electrons in different shells of an atom | Physical sciences | 0 | 0 | 0 |
| 318 | Electron shell | Principal energy levels in atomic physics | Physical sciences | 0 | 0 | 0 | |
| 319 | Electronvolt | Unit of energy | Physical sciences | 0 | 0 | 0 | |
| 320 |  | Electrostatics | Study of still or slow electric charges | Physical sciences | 0 | 0 | 0 |
| 321 |  | Elliptical galaxy | Spherical or ovoid mass of stars | Physical sciences | 0 | 0 | 0 |
| 322 |  | Emerald | Green gemstone, a beryl variety | Physical sciences | 0 | 0 | 0 |
| 323 | Emulsion | Mixture of two or more immiscible liquids | Physical sciences | 0 | 0 | 0 | |
| 324 |  | Energy | Physical quantity | Physical sciences | 0 | 0 | 0 |
| 325 |  | Energy level | Different states of quantum systems | Physical sciences | 0 | 0 | 0 |
| 326 |  | Enthalpy | Measure of energy in a thermodynamic system | Physical sciences | 0 | 0 | 0 |
| 327 | | Entropy | Property of a thermodynamic system | Physical sciences | 0 | 0 | 0 |
| 328 |  | Environmental chemistry | Scientific study | Physical sciences | 0 | 0 | 0 |
| 329 |  | Equations of motion | Equations that describe the behavior of a physical system | Physical sciences | 0 | 0 | 0 |
| 330 |  | Equatorial coordinate system | Celestial coordinate system used to specify the positions of celestial objects | Physical sciences | 0 | 0 | 0 |
| 331 | Equinox | Semi-annual astronomical event where the Sun is directly above the Earth's equator | Physical sciences | 0 | 0 | 0 | |
| 332 |  | Equivalence principle | Hypothesis that inertial and gravitational masses are equivalent | Physical sciences | 0 | 0 | 0 |
| 333 |  | Erbium | Chemical element with atomic number 68 (Er) | Physical sciences | 0 | 0 | 0 |
| 334 |  | Eris (dwarf planet) | Most massive dwarf planet | Physical sciences | 0 | 0 | 0 |
| 335 |  | Erosion | Natural processes removing soil and rock | Physical sciences | 0 | 0 | 0 |
| 336 |  | Escape velocity | Concept in celestial mechanics | Physical sciences | 0 | 0 | 0 |
| 337 |  | Ester | Compound derived from an acid | Physical sciences | 0 | 0 | 0 |
| 338 |  | Estuary | Partially enclosed coastal body of brackish water | Physical sciences | 0 | 0 | 0 |
| 339 |  | Ethane | Organic compound (H3C–CH3) | Physical sciences | 0 | 0 | 0 |
| 340 | Ethanol | Organic compound | Physical sciences | 0 | 0 | 0 | |
| 341 |  | Ether | Organic compounds made of alkyl/aryl groups bound to oxygen (R–O–R') | Physical sciences | 0 | 0 | 0 |
| 342 |  | Ethylene | Hydrocarbon compound (H2C=CH2) | Physical sciences | 0 | 0 | 0 |
| 343 |  | Europa (moon) | Smallest Galilean moon of Jupiter | Physical sciences | 0 | 0 | 0 |
| 344 |  | Europium | Chemical element with atomic number 63 (Eu) | Physical sciences | 0 | 0 | 0 |
| 345 |  | Evaporation | Vaporization of a liquid from its surface | Physical sciences | 0 | 0 | 0 |
| 346 |  | Event horizon | Region in spacetime from which nothing can escape | Physical sciences | 0 | 0 | 0 |
| 347 |  | Exoplanet | Planet outside of the Solar System | Physical sciences | 0 | 0 | 0 |
| 348 |  | Experiment | Scientific procedure performed to validate a hypothesis | Physical sciences | 0 | 0 | 0 |
| 349 |  | Explosion | Sudden release of heat and gas | Physical sciences | 0 | 0 | 0 |
| 350 |  | Extinction (astronomy) | Interstellar absorption and scattering of light | Physical sciences | 0 | 0 | 0 |
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