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#ThingDescriptionTopicUp/Down/NetScore ▼
501Higgs bosonElementary particle involved with rest massPhysical sciences+0 / -0 / 00.500000
502High-pressure areaRegion with higher atmospheric pressurePhysical sciences+0 / -0 / 00.500000
503HillLandform that extends above the surrounding terrainPhysical sciences+0 / -0 / 00.500000
504History of atomic theoryPhysical sciences+0 / -0 / 00.500000
505Hooke's lawForce needed to pull a spring grows linearly with distancePhysical sciences+0 / -0 / 00.500000
506HorizonApparent curve that separates earth from skyPhysical sciences+0 / -0 / 00.500000
507Horsehead NebulaDark nebula in the constellation OrionPhysical sciences+0 / -0 / 00.500000
508Hot springSpring produced by the emergence of geothermally heated groundwaterPhysical sciences+0 / -0 / 00.500000
509Hotspot (geology)Volcanic region hotter than the surrounding mantlePhysical sciences+0 / -0 / 00.500000
510HourUnit of time equal to 60 minutesPhysical sciences+0 / -0 / 00.500000
511Hubble's lawObservation in physical cosmologyPhysical sciences+0 / -0 / 00.500000
512HumidityConcentration of water vapour in the airPhysical sciences+0 / -0 / 00.500000
513Hyades (star cluster)Open cluster in the constellation TaurusPhysical sciences+0 / -0 / 00.500000
514HydrocarbonOrganic compound consisting entirely of hydrogen and carbonPhysical sciences+0 / -0 / 00.500000
515Hydrofluoric acidSolution of hydrogen fluoride in waterPhysical sciences+0 / -0 / 00.500000
516HydrogenChemical element with atomic number 1 (H)Physical sciences+0 / -0 / 00.500000
517Hydrogen bondIntermolecular attraction between a hydrogen donor-and-acceptor pairPhysical sciences+0 / -0 / 00.500000
518HydrographyMeasurement of bodies of waterPhysical sciences+0 / -0 / 00.500000
519HydrologyScience of the movement, distribution, and quality of water on EarthPhysical sciences+0 / -0 / 00.500000
520IceFrozen water; the solid state of waterPhysical sciences+0 / -0 / 00.500000
521Ice sheetLarge mass of glacial icePhysical sciences+0 / -0 / 00.500000
522Ice shelfLarge platform of glacial icePhysical sciences+0 / -0 / 00.500000
523IcebergLarge formation of floating icePhysical sciences+0 / -0 / 00.500000
524Ideal gas lawEquation of the state of a hypothetical ideal gasPhysical sciences+0 / -0 / 00.500000
525Igneous rockRock formed through the cooling and solidification of magma or lavaPhysical sciences+0 / -0 / 00.500000
526Impact craterCircular depression in a solid astronomical body formed by the impact of a smaller objectPhysical sciences+0 / -0 / 00.500000
527Impact eventCollision of two astronomical objectsPhysical sciences+0 / -0 / 00.500000
528Imperial unitsSystem of measurementsPhysical sciences+0 / -0 / 00.500000
529Impulse (physics)Integral of a comparatively larger force over a short time intervalPhysical sciences+0 / -0 / 00.500000
530InchUnit of lengthPhysical sciences+0 / -0 / 00.500000
531IndiumChemical element with atomic number 49 (In)Physical sciences+0 / -0 / 00.500000
532InductanceProperty of electrical conductorsPhysical sciences+0 / -0 / 00.500000
533InertiaFundamental principle of classical physicsPhysical sciences+0 / -0 / 00.500000
534Information scienceAcademic field concerned with collection and analysis of informationPhysical sciences+0 / -0 / 00.500000
535InfraredForm of electromagnetic radiationPhysical sciences+0 / -0 / 00.500000
536Inorganic chemistryField of chemistryPhysical sciences+0 / -0 / 00.500000
537Inorganic compoundChemical compound without any carbon-hydrogen bondsPhysical sciences+0 / -0 / 00.500000
538Intermolecular forceForce of attraction or repulsion between molecules and neighboring particlesPhysical sciences+0 / -0 / 00.500000
539Internal structure of EarthInterior of the earthPhysical sciences+0 / -0 / 00.500000
540Interplanetary mediumMaterial which fills the Solar SystemPhysical sciences+0 / -0 / 00.500000
541Interstellar mediumMatter and radiation in the space between the star systems in a galaxyPhysical sciences+0 / -0 / 00.500000
542Io (moon)Innermost Galilean moon of JupiterPhysical sciences+0 / -0 / 00.500000
543IodineChemical element with atomic number 53 (I)Physical sciences+0 / -0 / 00.500000
544IonParticle, atom or molecule with a net electrical chargePhysical sciences+0 / -0 / 00.500000
545Ionic bondingChemical bonding involving attraction between ionsPhysical sciences+0 / -0 / 00.500000
546IonizationProcess by which atoms or molecules acquire charge by gaining or losing electronsPhysical sciences+0 / -0 / 00.500000
547Ionizing radiationHarmful high-frequency radiationPhysical sciences+0 / -0 / 00.500000
548IridiumChemical element with atomic number 77 (Ir)Physical sciences+0 / -0 / 00.500000
549IronChemical element with atomic number 26 (Fe)Physical sciences+0 / -0 / 00.500000
550Irregular galaxyClass of galaxyPhysical sciences+0 / -0 / 00.500000
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