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10,033 things · 1,902 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 ▼ | |
|---|---|---|---|---|---|---|
| 351 |  | Dry season | Yearly period of low rainfall, especially in the tropics | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 352 |  | Dwarf planet | Small planetary-mass object | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 353 |  | Eagle Nebula | Open cluster in the constellation Serpens | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 354 |  | Earth | Third planet from the Sun | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 355 |  | Earth science | Fields of natural science related to Earth | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 356 |  | Earth's crust | Earth's outer shell of rock | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 357 |  | Earth's inner core | Innermost part of Earth, a solid ball of iron-nickel alloy | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 358 |  | Earth's magnetic field | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 359 |  | Earth's mantle | Layer of silicate rock | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 360 |  | Earth's outer core | Fluid layer between Earth's solid inner core and its mantle | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 361 |  | Earthquake | Sudden movement of the Earth's crust | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 362 |  | Eclipse | Astronomical event where one body is hidden by another | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 363 |  | Ecliptic | Apparent path of the Sun on the celestial sphere | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 364 |  | Eddy current | Loops of electric current induced within conductors by a changing magnetic field | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 365 |  | El Niño–Southern Oscillation | Global climate phenomenon | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 366 | Elastic modulus | Physical property that measures stiffness of material | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 367 | Elasticity (physics) | Physical property when materials or objects return to original shape after deformation | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 368 |  | Electric charge | Electromagnetic property of matter | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 369 |  | Electric current | Flow of electric charge | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 370 | | Electric field | Physical field surrounding an electric charge | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 371 | | Electrical impedance | Opposition of a circuit to a current when a voltage is applied | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 372 | | Electrical resistance and conductance | Opposition to the passage of an electric current | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 373 |  | Electrochemistry | Branch of physical chemistry | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 374 |  | Electrolysis | Technique in chemistry and manufacturing | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 375 |  | Electromagnet | Magnet that creates a magnetic field through an electric current | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 376 | | Electromagnetic field | Electric and magnetic fields produced by moving charged objects | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 377 |  | Electromagnetic induction | Production of voltage by a varying magnetic field | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 378 | | Electromagnetic radiation | Physical model of propagating energy | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 379 |  | Electromagnetic spectrum | Full range of electromagnetic radiation frequencies | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 380 | | Electromagnetism | Fundamental interaction between charged particles | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 381 |  | Electron | Elementary particle with negative charge | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 382 |  | Electron configuration | Mode of arrangement of electrons in different shells of an atom | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 383 | Electron shell | Principal energy levels in atomic physics | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 384 | Electronvolt | Unit of energy | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 385 |  | Electrostatics | Study of still or slow electric charges | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 386 |  | Elliptical galaxy | Spherical or ovoid mass of stars | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 387 |  | Emerald | Green gemstone, a beryl variety | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 388 | Emulsion | Mixture of two or more immiscible liquids | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 389 |  | Enthalpy | Measure of energy in a thermodynamic system | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 390 |  | Environmental chemistry | Scientific study | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 391 |  | Equations of motion | Equations that describe the behavior of a physical system | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 392 |  | Equatorial coordinate system | Celestial coordinate system used to specify the positions of celestial objects | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 393 | Equinox | Semi-annual astronomical event where the Sun is directly above the Earth's equator | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 394 |  | Equivalence principle | Hypothesis that inertial and gravitational masses are equivalent | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 395 |  | Erbium | Chemical element with atomic number 68 (Er) | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 396 |  | Eris (dwarf planet) | Most massive dwarf planet | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 397 |  | Erosion | Natural processes removing soil and rock | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 398 |  | Ester | Compound derived from an acid | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 399 |  | Estuary | Partially enclosed coastal body of brackish water | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 400 |  | Ethylene | Hydrocarbon compound (H2C=CH2) | Physical sciences | +0 / -0 / 0 | 0.500000 |
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