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Physical sciences, 1297

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Note: may not reflect changes after 2025-03-21

Science, 17

1. Science
2. Experiment
3. Laboratory
   1. Laboratory equipment
4. Nature
5. Observation
6. Research
7. Scientific method
8. Scientific theory
9. Scientist
10. Quantum computer

Data units, 3

1. Byte
2. Bit
3. Baud

Geometric measurements, 3

1. Degree (angle)
2. Radian
3. Steradian

Astronomy, 313

Basics, 20

1. Astronomy
2. Astrobiology
3. Extinction (astronomy)
4. Extraterrestrial life
5. Magnitude (astronomy)
6. Space
7. Geocentric model
8. Heliocentrism
9. Astrophysics
10. Precession
11. Event horizon
12. Van Allen radiation belt
13. Tunguska event
14. Apsis
15. Orbital period
16. Semi-major axis
17. Gravitational lens

Units

1. Astronomical unit
2. Light-year
3. Parsec

Observational astronomy, 3

1. Absolute magnitude
2. Apparent magnitude
3. Observatory

Planetary science, 8

1. Asteroid
2. Comet
3. Extrasolar planet
4. Minor planet
5. Planet
   1. Dwarf planet
   2. Gas giant
   3. Terrestrial planet

Astronomical instruments and techniques, 15

1. Photometry (astronomy)
2. Astrolabe
3. Sundial
4. Atacama Large Millimeter Array
5. Great Observatories program
6. Herschel Space Observatory
7. Hubble Space Telescope
8. James Webb Space Telescope
9. Spitzer Space Telescope
10. Very Large Telescope
11. Wilkinson Microwave Anisotropy Probe
12. Cerro Tololo Inter-American Observatory
13. Mauna Kea Observatories
14. Mount Wilson Observatory
15. Palomar Observatory

Astrometry, 86

1. Astrometry
2. Cosmic distance ladder
3. Parallax

Celestial sphere, 83

1. Celestial coordinate system
   1. Declination
   2. Right ascension
2. Celestial equator
3. Celestial sphere
4. Equinox
5. Ecliptic
6. Horizon
7. Nadir
8. Solstice
9. Star chart
10. Zenith
11. Zodiac

Constellations, 70

IAU constellations, 65

1. Constellation
2. Andromeda (constellation)
3. Aquarius (constellation)
4. Aquila (constellation)
5. Ara (constellation)
6. Aries (constellation)
7. Auriga (constellation)
8. Boötes
9. Camelopardalis
10. Cancer (constellation)
11. Canes Venatici
12. Canis Major
13. Canis Minor
14. Capricornus
15. Carina (constellation)
16. Cassiopeia (constellation)
17. Centaurus
18. Cepheus (constellation)
19. Cetus
20. Columba (constellation)
21. Coma Berenices
22. Corona Australis
23. Corona Borealis
24. Corvus (constellation)
25. Crater (constellation)
26. Crux
27. Cygnus (constellation)
28. Delphinus
29. Draco (constellation)
30. Equuleus
31. Eridanus (constellation)
32. Gemini (constellation)
33. Hercules (constellation)
34. Hydra (constellation)
35. Lacerta
36. Leo (constellation)
37. Leo Minor
38. Lepus (constellation)
39. Libra (constellation)
40. Lupus (constellation)
41. Lynx (constellation)
42. Lyra
43. Monoceros
44. Ophiuchus
45. Orion (constellation)
46. Pegasus (constellation)
47. Perseus (constellation)
48. Pisces (constellation)
49. Piscis Austrinus
50. Puppis
51. Pyxis
52. Sagitta
53. Sagittarius (constellation)
54. Scorpius
55. Scutum
56. Serpens
57. Sextans
58. Taurus (constellation)
59. Triangulum
60. Triangulum Australe
61. Ursa Major
62. Ursa Minor
63. Vela (constellation)
64. Virgo (constellation)
65. Vulpecula

Chinese constellations, 5

1. Chinese constellations
   1. Vermilion Bird
   2. White Tiger
   3. Black Tortoise
   4. Azure Dragon

Astronomical objects, 75

Basics, 14

1. Astronomical object
2. Centaurus A
3. Cygnus X-1
4. Eta Carinae
5. Halley's Comet
6. Hyades (star cluster)
7. Large Magellanic Cloud
8. Messier 87
9. Mira
10. Omega Centauri
11. Orion Nebula
12. Pleiades
13. Sagittarius A*
14. Geosynchronous orbit

Galaxies, 5

1. Local Group
   1. Magellanic Clouds
   2. Milky Way
   3. Andromeda Galaxy
   4. Triangulum Galaxy

Solar System, 29

1. Solar System
2. Sun
3. Mercury (planet)
4. Venus
5. Earth
   1. Moon
6. Mars
   1. Deimos
   2. Phobos
7. Asteroid belt
8. Ceres (dwarf planet)
9. Jupiter
   1. Io (moon)
   2. Europa (moon)
   3. Ganymede (moon)
   4. Callisto (moon)
10. Saturn
    1. Enceladus (moon)
    2. Titan (moon)
11. Uranus
12. Neptune
    1. Triton (moon)
13. Pluto
    1. Charon
14. Eris (dwarf planet)
15. Makemake (dwarf planet)
16. Haumea (dwarf planet)
17. Kuiper belt
18. Oort cloud

Extrasolar planets, 2

1. PSR B1257+12 B
2. 51 Pegasi b

Stars, 23

1. Sirius
2. Canopus
3. Arcturus
4. Alpha Centauri
5. Vega
6. Rigel
7. Procyon
8. Achernar
9. Betelgeuse
10. Capella (star)
11. Altair
12. Aldebaran
13. Spica
14. Antares
15. Pollux (star)
16. Fomalhaut
17. Deneb
18. RR Lyrae
19. Alpha Crucis
20. Beta Centauri
21. Algol
22. Delta Cephei
23. Polaris

Other objects, 2

1. 3C 273
2. Crab Nebula

Galactic astronomy and Extragalactic astronomy, 32

Basics, 16

1. Black hole
   1. Schwarzschild radius
   2. Supermassive black hole
2. Cosmic ray
3. Dark nebula
4. Galaxy
5. Galaxy cluster
6. Galaxy group
   1. Supercluster
7. Great Attractor
8. H II region
9. Interstellar medium
10. Molecular cloud
11. Nebula
12. Outer space
13. Solar wind

Star clusters, 4

1. Star cluster
2. Globular cluster
3. Open cluster
4. Stellar association

Galaxy morphological classification, 6

1. Galaxy morphological classification
2. Dwarf galaxy
3. Elliptical galaxy
4. Irregular galaxy
5. Lenticular galaxy
6. Spiral galaxy

Active galactic nucleus, 6

1. Active galactic nucleus
2. Blazar
3. Quasar
4. Radio galaxy
5. Seyfert galaxy
6. Starburst galaxy

Physical cosmology, 15

1. Cosmology
2. Age of the universe
3. Big Bang
4. Cosmic microwave background radiation
5. Dark energy
6. Dark matter
7. Formation and evolution of the Solar System
8. Galaxy formation and evolution
9. Hubble's law
10. Solar Nebula
11. Nebular hypothesis
12. Redshift
13. Universe
    1. Observable universe
14. Wormhole

Stellar astronomy, 33

1. Star
2. Brown dwarf
3. Circumstellar habitable zone
4. Gamma-ray burst
5. Hertzsprung–Russell diagram
6. Metallicity
7. Planetary system
8. Spectral class
9. Stellar evolution
   1. Planetary nebula
   2. Star formation
   3. Main sequence
   4. Protostar
   5. Red giant
   6. Giant star
   7. Supergiant
   8. Wolf–Rayet star
   9. Compact star
      1. White dwarf
      2. Neutron star
      3. Stellar black hole
10. Stellar kinematics
11. Stellar magnetic field
12. Stellar nucleosynthesis
13. Stellar rotation
14. Star system
    1. Binary star
    2. Circumstellar disk
15. Variable star
    1. Cepheid variable
    2. Nova
    3. Pulsar
    4. Supernova

Celestial mechanics, 20

1. Celestial mechanics
2. Eclipse
   1. Lunar eclipse
   2. Solar eclipse
3. Ephemeris
4. Epoch (astronomy)
5. Escape velocity
6. Equatorial coordinate system
7. Gravity assist
8. Kepler's laws of planetary motion
9. Lagrangian point
10. Natural satellite
11. Orbit
    1. Geostationary orbit
    2. Low Earth orbit
12. Orbital elements
13. Orbital eccentricity
14. Orbital mechanics
15. Occultation
16. Two-body problem

Geodesy, photogrammetry, 6

1. Azimuth
2. Global Positioning System (GPS)
3. Satellite navigation
4. Sidereal time
5. Atomic clock
6. Sextant

Physics, 418

Fundamental physics concepts, 25

1. Physics
2. Energy
   1. Mass–energy equivalence
3. Matter
4. Radiation
5. Spacetime
6. Time
   1. Planck time
   2. Planck units
7. Vacuum
8. Theory of relativity
9. General relativity
10. Special relativity
11. Michelson–Morley experiment

Theory of physics, 11

1. Physical quantity
2. Theoretical physics
3. Schrödinger's cat
4. Time travel
5. Quantum field theory
6. Quantum mechanics
7. Quantum entanglement
8. Uncertainty principle
9. Schrödinger equation
10. Wave function
11. Wave–particle duality

Mechanics, 126

General mechanics, 92

1. Mechanics
2. Classical mechanics
3. Kinematic pair

Fundamental concepts in mechanics and gravitation, 9

1. Conservation of energy
2. Force
3. Frame of reference
4. Inertia
5. Mass
6. Moment of inertia
7. Perpetual motion
   1. Gravitation
8. Gravitational constant

Energy in motion and potential, 3

1. Kinematics
2. Kinetic energy
3. Potential energy

Dynamics and forces in motion, 20

1. Density
   1. Continuum mechanics
2. Impulse (physics)
3. Momentum
4. Gyroscope
5. Motion (physics)
   1. Acceleration
   2. Newton's laws of motion
   3. Free fall
   4. Velocity
6. Rotation
   1. Angular momentum
   2. Centrifugal force
   3. Centripetal force
   4. Coriolis effect
7. Newton's law of universal gravitation
8. Torque
9. Weight
10. Work (physics)
11. Length contraction

Mechanics of Solids and Materials, 10

1. Statics
2. Solid mechanics
3. Strength of materials
4. Stress (mechanics)
5. Friction
6. Elastic modulus
7. Elasticity (physics)
8. Hooke's law
9. Plasticity (physics)
10. Stiffness

Dynamics and Chaos Theory, 3

1. Butterfly effect
2. Angular velocity
   1. Dynamics (mechanics)

Measurement of geometric and mechanical quantities, 1

1. Foucault pendulum

Measurement, 14

1. Measurement
   1. Measuring instrument
   2. Altimeter
   3. Micrometer
   4. Sensor
   5. Spectrometer
   6. Theodolite
   7. Weighing scale
2. Units of measurement
   1. Metric system
   2. International System of Units
3. Metrology
4. Ruler
5. Pendulum

Units, 29

Area, 3

1. square metre
2. Acre
3. Hectare

Length, 7

1. Angstrom
2. Foot (unit)
3. Inch
4. Metre
5. Mile
6. Nautical mile
7. Yard

Time, 9

1. Second
2. Minute
3. Hour
4. Day
5. Week
6. Month
7. Year
8. Decade
9. Millennium

Volume, 2

1. Gallon
2. Litre

Energy, force, and pressure, 3

1. Atmosphere (unit)
2. Newton (unit)
3. Pascal (unit)

Mass, 4

1. Kilogram
2. Ton
3. Pound (mass)
4. Ounce

Velocity, 1

1. Knot (unit)

Fluid mechanics, 15

1. Hydraulics
   1. Rheology
2. Fluid mechanics
3. Bernoulli's principle
4. Buoyancy
5. Convection
6. Diffusion
7. Fluid dynamics
8. Fluid statics
9. Navier–Stokes equations
10. Reynolds number
11. Surface tension
12. Turbulence
13. Viscosity
14. Archimedes' principle

Aerodynamics, 2

1. Aerodynamics
2. Mach number

Wave phenomena and acoustics, 17

1. Wave
2. Acoustics
   1. Sound
   2. Speed of sound
   3. Ultrasound
3. Diffraction
4. Frequency
5. Interference (wave propagation)
6. Noise
7. Resonance
8. Doppler effect
9. Metronome
10. Oscillation
    1. Harmonic oscillator
11. Amplitude
12. Decibel
13. Sonar

Optics, 29

1. Optics
2. Light
   1. Speed of light
3. Nonlinear optics
4. Optical illusion
5. Depth of field
6. Anti-reflective coating
7. Focal length
8. Focus (optics)
9. Physical optics
10. Wavelength
11. Luminosity
12. Albedo
13. Reflection (physics)
14. Refraction
15. Refractive index
16. Diffraction grating
17. Rayleigh scattering
18. Interferometry
19. Kerr effect
20. Free-electron laser
21. Photonics
22. Polarization (waves)
23. Polarizer
24. Dispersion (optics)
25. Catadioptric system

Units, 3

1. Candela
2. Lumen (unit)
3. Lux

Heat and thermodynamics, 49

1. First law of thermodynamics
2. Joule
3. Calorie

Thermodynamics, 15

1. Second law of thermodynamics
2. Heat transfer
3. Internal energy
4. Phase (matter)
5. Critical point (thermodynamics)
6. Condensation
7. Evaporation
8. Triple point
9. State of matter
10. Gas
11. Liquid
12. Solid
13. Heat
14. Heat capacity
15. Thermal conductivity

Heat conduction, 1

1. Adiabatic process

Temperature, 13

1. Absolute zero
2. Power (physics)
3. Boiling
4. Freezing
5. Melting
6. Sublimation (phase transition)
7. Brownian motion
8. Boiling point
9. Melting point
10. Thermometer
11. Celsius
12. Fahrenheit
13. Kelvin

Thermodynamics, 17

1. Standard conditions for temperature and pressure
2. Ideal gas
3. Statistical mechanics
4. Temperature
5. Thermodynamics
6. Enthalpy
7. Entropy
8. Ideal gas law
9. Pressure
10. Functions of state
11. Gibbs free energy
12. Thermodynamic state
13. Boltzmann constant
14. Enthalpy of vaporization
15. Vapor pressure
16. Boyle's law
17. Black body

Electricity and magnetism, 70

1. Field (physics)
2. Voltage

Units, 10

1. Volt
2. Ohm
3. Hertz
4. Farad
5. Coulomb
6. Henry (unit)
7. Tesla (unit)
8. Weber (unit)

Power & Electricity, 2

1. Watt
2. Ampere

Current, 10

1. Alternating current
2. Direct current
3. Magnetic flux
4. Permeability (electromagnetism)
5. Electrical resistivity and conductivity
6. Electrical resistance and conductance
   1. Ohm's law
7. Electrical impedance
8. Electrical reactance
9. Electronvolt

Magnetism, 7

1. Ferromagnetism
2. Magnetism
3. Magnet
4. Magnetomotive force
5. Magnetostatics
6. Magnetic field
7. Magnetic moment

Electromagnetism, 41

1. Plasma (physics)
2. Superfluidity
3. Electricity
4. Electric current
5. Electrical conductor
6. Dielectric

Electromagnetism and circuit laws, 17

1. Insulator (electricity)
2. Oil drop experiment
3. Electrostatics
4. Electric charge
5. Coulomb's law
6. Electric field
7. Gauss's law
8. Electric potential
9. Lorentz force
10. Electromotive force
11. Electromagnetic induction
12. Faraday's law of induction
13. Maxwell's equations
14. Electromagnetic field
15. Ampère's circuital law
16. Kirchhoff's circuit laws
17. Electromagnet

Electromagnetic waves and spectrum, 9

1. Electromagnetic radiation
   1. Electromagnetic spectrum
2. Capacitance
3. Inductance
   1. Radio waves
   2. Microwave
   3. Infrared
   4. Visible spectrum
   5. Ultraviolet

Electromagnetic phenomena and radiation, 5

1. Eddy current
2. Gain
3. Photoelectric effect
   1. X-ray
   2. Gamma ray

Novel quantum and electromagnetic materials, 4

1. Bose–Einstein condensate
2. Electromagnetic force
3. Metamaterial
4. Superconductivity

Nuclear, atomic and molecular physics, 99

1. Condensed matter physics
2. Isotope
3. Amorphous solid
4. Solid-state physics
5. Compton effect
6. Degenerate matter
7. Quantum tunnelling

Elementary and fundamental particles, 48

1. Fundamental interaction
2. Elementary particle
3. Dirac equation
4. Graviton
5. Atom
6. Strong interaction
7. Weak interaction
8. Quantum chromodynamics
9. Quantum electrodynamics
10. Particle physics
11. Particle
12. Cloud chamber
13. Standard Model
14. String theory
15. Spontaneous symmetry breaking
16. Supersymmetry
17. Particle accelerator
    1. Large Hadron Collider
    2. Synchrotron
    3. Synchrotron radiation
    4. Tevatron
18. Quark–gluon plasma
19. Geiger–Marsden experiment

Subatomic particles, 25

1. Subatomic particle

Fermions, 18

1. Fermion
2. Lepton
   1. Electron
   2. Muon
   3. Tau (particle)
   4. Neutrino
3. Quark
   1. Up quark
   2. Down quark
   3. Charm quark
   4. Strange quark
   5. Top quark
   6. Bottom quark
4. Hadron
   1. Baryon
      1. Neutron
      2. Proton
   2. Meson

Bosons, 6

1. Boson
2. Gauge boson
3. Gluon
4. Photon
5. Higgs boson
6. W and Z bosons

Radioactivity, radioactive decay, 15

1. Ionizing radiation
2. Radioactive decay
3. Alpha decay
4. Alpha particle
5. Beta Radiation
6. Beta decay

Antimatter, 6

1. Antimatter
2. Antiparticle
3. Positron
4. Antihydrogen
5. Antiproton
6. Antineutron

Units, 3

1. Becquerel
2. Gray (unit)
3. Sievert

Nuclear reactions, 7

1. Binding energy
2. Nuclear physics
3. Nuclear fusion
   1. Tokamak
   2. Fusion power
4. Nuclear fission
5. Atomic nucleus

Atomic physics, 20

1. Atomic physics
2. Atomic orbital
3. Atomic theory
4. Bohr model
5. Electron configuration
6. Electron shell
7. Excited state
8. Hyperfine structure
9. Plum pudding model
10. Principal quantum number
11. Pauli exclusion principle
12. Stimulated emission
13. Ionization energy
14. Ion
15. Auger effect
16. Bremsstrahlung
17. Atomic mass unit
18. Atomic radius
19. Spin (physics)
20. Ionization

Molecular physics, 2

1. Molecular orbital
2. Molecular orbital theory

Chemistry, 316

1. Citric acid cycle
2. Concentration
3. Electronegativity
4. Functional group
5. Fluorescence
6. Glycolysis
7. Hydroxide
8. Hydrophobe
9. Monosaccharide
10. Polymerization
    1. Polymerase chain reaction
11. Phlogiston
12. Polysaccharide
13. Stoichiometry
14. Tritium
15. Radionuclide
16. Solvent
17. Covalent radius
18. Oxidation state
19. Geochemistry
20. Carbon cycle
21. Eutrophication
22. Phase diagram
23. Van der Waals radius
24. Macromolecule
25. parts per million
26. Glycoprotein
27. Poisson's ratio
28. Electrophoresis
29. Valence electron
30. Adhesion
31. Valence (chemistry)
32. Cosmic dust
33. IUPAC nomenclature
34. Radical (chemistry)
35. Isomer

Amount of Substance, 2

1. Amount of substance
2. Mole (unit)

Basics, 40

1. Chemistry
2. Biochemistry
3. Computational chemistry
4. Electrochemistry
   1. Electrolysis
5. Environmental chemistry
6. Forensic science
7. Inorganic chemistry
8. Medicinal chemistry
9. Nuclear chemistry
   1. Table of nuclides
10. Organic chemistry
11. Organometallic chemistry
12. Photochemistry
13. Physical chemistry
14. Polymer chemistry
15. Quantum chemistry
16. Alchemy
17. Chemical bond
    1. Ionic bond
    2. Covalent bond
    3. Metallic bond
    4. Hydrogen bond
    5. Intermolecular force
    6. Molecule
18. Chemical reaction
    1. Acid–base reaction
    2. Catalysis
    3. Chemical equation
    4. Chemical equilibrium
    5. Chemical formula
    6. Chemical kinetics
    7. Salt metathesis reaction
    8. Reaction mechanism
    9. Redox
    10. Substitution reaction
19. Chemical substance
20. Chemical synthesis
21. Chemist
22. Conservation of mass

Solid-State Chemistry and Crystallography, 14

1. Atomism
2. Classical element
3. Hydrolysis
4. Solubility
5. Adsorption
6. PH
7. Electrolyte
8. Heavy water
9. Crystallization
10. Crystal
11. Crystal system
12. Phase transition
13. Hardness
14. Allotropy

Crystallography, 3

1. Crystallography
2. Crystal structure
3. Mohs scale of mineral hardness

Analytical chemistry, 6

1. Analytical chemistry
2. Chromatography
3. Mass spectrometry
4. Spectroscopy
   1. Absorption spectrum
   2. Absorption spectroscopy

Chemical substances, 213

1. Mineral
   1. Gypsum
   2. Salt
   3. Silicate
2. Diamond
3. Graphite
4. Quartz
5. Oxide
6. Ozone
7. Carbonate
8. Chloride
9. Organophosphorus
10. Organosilicon
11. Organosulfur compounds
12. Thiol
13. Ester
14. Ether
15. Hydrocarbon
16. Aromatic compound
17. Alkyne

Chemical elements, 148

Basics, 6

1. Chemical element
2. List of elements
3. Atomic number
4. Atomic mass
5. Periodic table
6. Period (periodic table)

Chemical element groups, 24

1. Metal
2. Alkali metal
3. Alkaline earth metal
4. Lanthanide
5. Actinide
6. Transition metal
7. Group 3 element
8. Group 4 element
9. Group 5 element
10. Group 6 element
11. Noble metal
12. Group 11 element
13. Group 12 element
14. Metalloid
15. Nonmetal
16. Boron group
17. Carbon group
18. Pnictogen
19. Chalcogen
20. Halogen
21. Noble gas
22. Period 1 element
23. Period 2 element
24. Period 3 element

Chemical elements, 118

1. Hydrogen (H)
2. Helium (He)
3. Lithium (Li)
4. Beryllium (Be)
5. Boron (B)
6. Carbon (C)
7. Nitrogen (N)
8. Oxygen (O)
9. Fluorine (F)
10. Neon (Ne)
11. Sodium (Na)
12. Magnesium (Mg)
13. Aluminium (Al)
14. Silicon (Si)
15. Phosphorus (P)
16. Sulfur (S)
17. Chlorine (Cl)
18. Argon (Ar)
19. Potassium (K)
20. Calcium (Ca)
21. Scandium (Sc)
22. Titanium (Ti)
23. Vanadium (V)
24. Chromium (Cr)
25. Manganese (Mn)
26. Iron (Fe)
27. Cobalt (Co)
28. Nickel (Ni)
29. Copper (Cu)
30. Zinc (Zn)
31. Gallium (Ga)
32. Germanium (Ge)
33. Arsenic (As)
34. Selenium (Se)
35. Bromine (Br)
36. Krypton (Kr)
37. Rubidium (Rb)
38. Strontium (Sr)
39. Yttrium (Y)
40. Zirconium (Zr)
41. Niobium (Nb)
42. Molybdenum (Mo)
43. Technetium (Tc)
44. Ruthenium (Ru)
45. Rhodium (Rh)
46. Palladium (Pd)
47. Silver (Ag)
48. Cadmium (Cd)
49. Indium (In)
50. Tin (Sn)
51. Antimony (Sb)
52. Tellurium (Te)
53. Iodine (I)
54. Xenon (Xe)
55. Caesium (Cs)
56. Barium (Ba)
57. Lanthanum (La)
58. Cerium (Ce)
59. Praseodymium (Pr)
60. Neodymium (Nd)
61. Promethium (Pm)
62. Samarium (Sm)
63. Europium (Eu)
64. Gadolinium (Gd)
65. Terbium (Tb)
66. Dysprosium (Dy)
67. Holmium (Ho)
68. Erbium (Er)
69. Thulium (Tm)
70. Ytterbium (Yb)
71. Lutetium (Lu)
72. Hafnium (Hf)
73. Tantalum (Ta)
74. Tungsten (W)
75. Rhenium (Re)
76. Osmium (Os)
77. Iridium (Ir)
78. Platinum (Pt)
79. Gold (Au)
80. Mercury (element) (Hg)
81. Thallium (Tl)
82. Lead (Pb)
83. Bismuth (Bi)
84. Polonium (Po)
85. Astatine (At)
86. Radon (Rn)
87. Francium (Fr)
88. Radium (Ra)
89. Actinium (Ac)
90. Thorium (Th)
91. Protactinium (Pa)
92. Uranium (U)
93. Neptunium (Np)
94. Plutonium (Pu)
95. Americium (Am)
96. Curium (Cm)
97. Berkelium (Bk)
98. Californium (Cf)
99. Einsteinium (Es)
100. Fermium (Fm)
101. Mendelevium (Md)
102. Nobelium (No)
103. Lawrencium (Lr)
104. Rutherfordium (Rf)
105. Dubnium (Db)
106. Seaborgium (Sg)
107. Bohrium (Bh)
108. Hassium (Hs)
109. Meitnerium (Mt)
110. Darmstadtium (Ds)
111. Roentgenium (Rg)
112. Copernicium (Cn)
113. Nihonium (Nh)
114. Flerovium (Fl)
115. Moscovium (Mc)
116. Livermorium (Lv)
117. Tennessine (Ts)
118. Oganesson (Og)

Chemical compounds, 45

1. Chemical compound
   1. Acid
      1. Acetic acid
      2. Boric acid
      3. Citric acid
      4. Hydrochloric acid
      5. Hydrofluoric acid
      6. Lactic acid
      7. Nitric acid
      8. Phosphoric acid
      9. Sulfuric acid
      10. Tannic acid
   2. Alkali
   3. Base (chemistry)
   4. Inorganic compound
      1. Ammonia
      2. Carbon dioxide
      3. Carbon monoxide
      4. Water
   5. Organic compound
      1. Acetone
      2. Alcohol
      3. Aldehyde
      4. Alkane
      5. Alkene
      6. Amide
      7. Amine
      8. Benzene
      9. Butane
      10. Ethane
      11. Caffeine
      12. Carboxylic acid
      13. Chlorofluorocarbon
      14. Cocaine
      15. Ethanol
      16. Ethylene
      17. Formaldehyde
      18. Fructose
      19. Glucose
      20. Haloalkane
      21. Ketone
      22. Methane
      23. Methanol
      24. Nicotine
      25. Phenol

Pharmacy, 2

1. Tablet (pharmacy)
2. Placebo

Earth science, 249

For specific geographical objects see Geography

General, 1

1. Earth science

Atmospheric phenomena and geological materials, 8

1. Wind wave
2. Water vapor
3. Ionosphere
4. Magnetosphere
5. St. Elmo's fire
6. Dew point
7. Corona
8. Obsidian

Cartography, 2

1. Cartography
2. Map

Natural disasters, 6

1. Natural disaster
2. Avalanche
3. Drought
4. Flood
5. Earthquake
6. Tsunami

Earth, 144

1. Structure of the Earth

Geology, 51

1. Fold (geology)
2. Formation (stratigraphy)
3. Fossil
4. Geology
5. Impact crater
6. Lithosphere
   1. Crust (geology)
   2. Fault (geology)
   3. Rock (geology)
      1. Basalt
      2. Flint
      3. Igneous rock
      4. Limestone
      5. Magma
      6. Metamorphic rock
      7. Sedimentary rock

Mineralogy, 20

1. Mineralogy
2. Plate tectonics
3. Stratigraphy
4. Stratum
5. Thrust fault
6. Pyroxene
7. Silicate minerals
8. Feldspar
9. Kaolinite
10. Talc
11. Mica
12. Asbestos
13. Beryl
14. Emerald
15. Sapphire
16. Ruby
17. Topaz
18. Amber
19. Ivory
20. Pearl

Petrology, 15

1. Petrology
2. Conglomerate (geology)
3. Gravel
4. Granite
5. Tuff
6. Schist
7. Marble
8. Gneiss
9. Sand
10. Sandstone
11. Bauxite
12. Peat
13. Quartzite
14. Slate
15. Oil shale

Geophysics, 7

1. Geodesy
2. Geophysics
3. Earth's magnetic field
4. Inner core
5. Outer core
6. Earth's mantle
7. Seismology

Geological history, 18

1. Geologic time scale
2. Pangaea
3. Extinction event
4. Permian–Triassic extinction event
5. Cretaceous–Paleogene extinction event
6. Ice age
7. Precambrian
8. Phanerozoic
9. Paleozoic
   1. Cambrian
   2. Permian
10. Mesozoic
11. Triassic
12. Jurassic
13. Cretaceous
14. Cenozoic
15. Quaternary
16. Holocene

Geomorphology, 50

1. Geomorphology
2. Erosion
3. Mesa
4. Stack (geology)
5. Weathering

Landforms, 45

1. Landform
2. Mountain
3. Mountain range
4. Plateau
5. Hill
6. Valley
7. Plain

Fluvial landforms, 9

1. Alluvial fan
2. Beach
3. Canyon
4. Cliff
5. Floodplain
6. Meander
7. Oasis
8. Rapid
9. Waterfall

Glacial landforms, 3

1. Cirque
2. Esker
3. Fjord

Karst, 3

1. Speleology
2. Cave
3. Karst

Oceanic and coastal landforms, 11

1. Atoll
2. Bay
3. Coast
4. Continental shelf
5. Coral reef
6. Lagoon
7. Oceanic trench
8. Peninsula
9. Isthmus
10. Island
11. Seamount

Volcanic landforms, 10

1. Volcano
2. Caldera
3. Geyser
4. Hotspot (geology)
5. Mid-ocean ridge
6. Volcanic crater
7. Volcanic plug
8. Lava dome
9. Submarine volcano
10. Guyot

Aeolian landforms, 2

1. Aeolian processes
2. Dune

Biomes, 17

1. Desert
2. Tundra
3. Heath
4. Jungle
5. Mangrove

Grasslands, 8

1. Grassland
2. Cerrado
3. Llanos
4. Pampas
5. Prairie
6. Sahel
7. Savanna
8. Steppe

Wetlands, 4

1. Wetland
2. Swamp
3. Bog
4. Raised bog

Air, 61

Atmosphere, 4

1. Atmosphere of Earth
2. Atmospheric chemistry
3. Air mass
4. Atmospheric pressure

Atmospheric optics, 5

1. Aurora (astronomy)
2. Halo (optical phenomenon)
3. Mirage
4. Rainbow
5. Sky

Climatology, 7

1. Climatology
2. Climate
3. El Niño–Southern Oscillation
4. Global warming
5. Köppen climate classification
6. Temperateness
7. Tropical climate

Meteorology, 45

1. Meteorology
2. Barometer
3. Humidity
4. Weather front
5. Weather

Clouds, 5

1. Cloud
2. Cirrus cloud
3. Cumulonimbus cloud
4. Cumulus cloud
5. Fog

Precipitations, 9

1. Precipitation
2. Acid rain
3. Black ice
4. Dew
5. Frost
6. Groundwater
7. Hail
8. Rain
9. Snow

Seasons, 7

1. Season
2. Spring (season)
3. Summer
4. Autumn
5. Winter
6. Wet season
7. Dry season

Atmospheric circulation, 19

1. Atmospheric circulation
2. Anticyclone
3. Cyclone
4. Hadley cell
5. Polar vortex

Storm, 8

1. Storm
2. Blizzard
3. Dust storm
4. Lightning
5. Saffir–Simpson hurricane scale
6. Thunderstorm
7. Tornado
8. Tropical cyclone

Winds, 6

1. Wind
2. Beaufort scale
3. Jet stream
4. Monsoon
5. Sea breeze
6. Trade wind

Water, 27

1. Hydrosphere
2. Cryosphere

Glaciology, 9

1. Glaciology
2. Firn
3. Glacier
4. Ice
5. Ice sheet
6. Ice shelf
7. Iceberg
8. Sea ice
9. Permafrost

Hydrology, 10

1. Hydrology
2. Water cycle
3. Hydrography
4. River
5. Estuary
6. River delta
7. Limnology
8. Lake
9. Pond
10. Tide

Oceanography, 6

1. Oceanography
2. Ocean
3. Sea
4. Ocean current
5. Sea level
6. Thermohaline circulation

Applied Sciences and Engineering Technology, 4

Biophysical processes and cellular transport, 2

1. Biophysics
2. Osmosis

Engineering and applied sciences, 2

1. Fatigue (material)
2. Remote sensing