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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 ▼ | |
|---|---|---|---|---|---|---|
| 551 |  | Island | Piece of subcontinental land surrounded by water | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 552 |  | Ivory | Material derived from the tusks and teeth of animals | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 553 |  | Jade | Ornamental stone, commonly green | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 554 |  | Jet stream | Fast-flowing atmospheric air current | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 555 |  | Joule | SI unit of energy | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 556 |  | Jurassic | Second period of the Mesozoic Era | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 557 |  | Kaolinite | Phyllosilicate clay mineral | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 558 |  | Karst | Topography from dissolved soluble rocks | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 559 |  | Kelvin | SI unit of temperature | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 560 |  | Kepler's laws of planetary motion | Laws describing planetary orbits | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 561 |  | Ketone | Organic compounds of the form >C=O | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 562 |  | Kilogram | Metric unit of mass | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 563 | Kinematics | Branch of physics describing the motion of objects without considering forces | Physical sciences | +0 / -0 / 0 | 0.500000 | |
| 564 |  | Kinetic energy | Energy of a moving physical body | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 565 |  | Knot (unit) | Unit of speed | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 566 |  | Krypton | Chemical element with atomic number 36 (Kr) | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 567 |  | Kuiper belt | Area of the Solar System beyond the planets, comprising small bodies | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 568 |  | Köppen climate classification | Climate classification system | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 569 |  | Laboratory | Workplace for scientific activity | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 570 |  | Lactic acid | Organic acid | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 571 |  | Lagoon | Shallow body of water separated from a larger one by a narrow landform | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 572 |  | Lagrange point | Equilibrium points near two orbiting bodies | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 573 |  | Lake | Large inland body of relatively still water | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 574 |  | Land reclamation | Creating new land from oceans, seas, riverbeds or lakes | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 575 |  | Landform | Feature of the solid surface of a planetary body | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 576 |  | Landslide | Natural hazard involving ground movement | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 577 |  | Lanthanide | Elements with atomic numbers 57-70 | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 578 |  | Lanthanum | Chemical element with atomic number 57 (La) | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 579 |  | Large Hadron Collider | Particle accelerator at CERN, Switzerland | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 580 |  | Large Magellanic Cloud | Satellite galaxy of the Milky Way | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 581 |  | Late Devonian mass extinction | Second of the big five mass extinctions | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 582 | | Late Ordovician mass extinction | Mass extinction event c. 444 million years ago | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 583 |  | Lava | Molten rock expelled by a volcano during an eruption | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 584 |  | Laws of thermodynamics | Observational basis of thermodynamics | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 585 |  | Lead | Chemical element with atomic number 82 (Pb) | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 586 |  | Lenticular galaxy | Class of galaxy between an elliptical galaxy and a spiral galaxy | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 587 |  | Lepton | Class of elementary particles | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 588 |  | Lift (force) | Force perpendicular to flow of surrounding fluid | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 589 |  | Light | Electromagnetic radiation humans can see | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 590 |  | Light-year | Distance that light travels in one year | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 591 |  | Limestone | Type of sedimentary rock | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 592 |  | Limnology | Science of inland aquatic ecosystems | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 593 |  | Lithium | Chemical element with atomic number 3 (Li) | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 594 |  | Litre | Unit of volume | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 595 |  | Local Group | Group of galaxies that includes the Milky Way | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 596 |  | Lorentz force | Force acting on charged particles in electric and magnetic fields | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 597 |  | Low Earth orbit | Orbit around Earth between 160 and 2000 km | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 598 |  | Low-pressure area | Area with air pressures lower than adjacent areas | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 599 |  | Luminosity | Measurement of radiant electromagnetic power emitted by an object | Physical sciences | +0 / -0 / 0 | 0.500000 |
| 600 |  | Lunar eclipse | Natural phenomenon wherein the Earth casts a shadow on the Moon | Physical sciences | +0 / -0 / 0 | 0.500000 |
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