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#ThingDescriptionTopicUp/Down/NetScore ▼
151AlchemyBranch of natural philosophyPhysical sciences+0 / -0 / 00.500000
152Alcohol (chemistry)Organic compound with at least one hydroxyl (–OH) groupPhysical sciences+0 / -0 / 00.500000
153AldehydeOrganic compound containing the functional group R–CH=OPhysical sciences+0 / -0 / 00.500000
154Alkali metalGroup of highly reactive chemical elementsPhysical sciences+0 / -0 / 00.500000
155Alkaline earth metalGroup of chemical elementsPhysical sciences+0 / -0 / 00.500000
156AlkeneHydrocarbon compound containing one or more C=C bondsPhysical sciences+0 / -0 / 00.500000
157AlkyneHydrocarbon compound containing one or more C≡C bondsPhysical sciences+0 / -0 / 00.500000
158AllotropyProperty of some chemical elements to exist in two or more different formsPhysical sciences+0 / -0 / 00.500000
159AlloyMixture or metallic solid solution composed of two or more elementsPhysical sciences+0 / -0 / 00.500000
160Alluvial fanFan-shaped deposit of sedimentPhysical sciences+0 / -0 / 00.500000
161Alpha CentauriStar system in the Centaurus constellationPhysical sciences+0 / -0 / 00.500000
162Alpha particleIonizing radiation particle of two protons and two neutronsPhysical sciences+0 / -0 / 00.500000
163Alternating currentElectric current that periodically reverses directionPhysical sciences+0 / -0 / 00.500000
164AlumFamily of double sulfate salts of aluminiumPhysical sciences+0 / -0 / 00.500000
165AluminiumChemical element with atomic number 13 (Al)Physical sciences+0 / -0 / 00.500000
166Amalgam (chemistry)Alloy of mercury with another metalPhysical sciences+0 / -0 / 00.500000
167AmberFossilized tree resinPhysical sciences+0 / -0 / 00.500000
168AmericiumChemical element with atomic number 95 (Am)Physical sciences+0 / -0 / 00.500000
169AmineChemical compounds and groups containing nitrogen with a lone pair (:N)Physical sciences+0 / -0 / 00.500000
170AmmoniaChemical compoundPhysical sciences+0 / -0 / 00.500000
171Ammonium sulfateChemical compoundPhysical sciences+0 / -0 / 00.500000
172Amorphous solidNon-crystalline solidPhysical sciences+0 / -0 / 00.500000
173Amount of substanceRatio of the number of particles in a sample to Avogadro's constantPhysical sciences+0 / -0 / 00.500000
174AmpereSI base unit of electric currentPhysical sciences+0 / -0 / 00.500000
175AmplitudeMeasure of change in a periodic variablePhysical sciences+0 / -0 / 00.500000
176Analytical chemistryStudy of the separation, identification, and quantification of matterPhysical sciences+0 / -0 / 00.500000
177Andromeda GalaxyBarred spiral galaxy in the Local GroupPhysical sciences+0 / -0 / 00.500000
178Angular momentumConserved physical quantity; rotational analogue of linear momentumPhysical sciences+0 / -0 / 00.500000
179AntimatterMaterial composed of antiparticlesPhysical sciences+0 / -0 / 00.500000
180AntimonyChemical element with atomic number 51 (Sb)Physical sciences+0 / -0 / 00.500000
181AntiparticleParticle with opposite chargesPhysical sciences+0 / -0 / 00.500000
182ArchipelagoCollection of islandsPhysical sciences+0 / -0 / 00.500000
183ArcturusBrightest star in the constellation BoötesPhysical sciences+0 / -0 / 00.500000
184ArgonChemical element with atomic number 18 (Ar)Physical sciences+0 / -0 / 00.500000
185ArsenicChemical element with atomic number 33 (As)Physical sciences+0 / -0 / 00.500000
186Artificial islandIsland constructed by peoplePhysical sciences+0 / -0 / 00.500000
187AsbestosCarcinogenic fibrous silicate mineralPhysical sciences+0 / -0 / 00.500000
188AsteroidMinor planet found within the inner Solar SystemPhysical sciences+0 / -0 / 00.500000
189Asteroid beltRegion between the orbits of Mars and JupiterPhysical sciences+0 / -0 / 00.500000
190AstrometryBranch of astronomy involving positioning and movements of celestial bodiesPhysical sciences+0 / -0 / 00.500000
191Astronomical coordinate systemsSystem for specifying positions of celestial objectsPhysical sciences+0 / -0 / 00.500000
192Astronomical objectNatural physical entity in spacePhysical sciences+0 / -0 / 00.500000
193AtmosphereLayer of gases surrounding an astronomical body held by gravityPhysical sciences+0 / -0 / 00.500000
194Atmosphere of EarthGas layer surrounding EarthPhysical sciences+0 / -0 / 00.500000
195Atmospheric circulationProcess which distributes thermal energy about Earth's surfacePhysical sciences+0 / -0 / 00.500000
196Atmospheric scienceStudy of the Earth's atmospherePhysical sciences+0 / -0 / 00.500000
197AtollRing-shaped coral reefPhysical sciences+0 / -0 / 00.500000
198Atomic numberNumber of protons found in the nucleus of an atomPhysical sciences+0 / -0 / 00.500000
199Atomic orbitalFunction describing an electron in an atomPhysical sciences+0 / -0 / 00.500000
200Atomic physicsField of physics that studies the atomPhysical sciences+0 / -0 / 00.500000
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