Soil physics – study of soil physical properties and processes.
Astrophysics – study of the physical aspects of celestial objects
Astronomy – studies the universe beyond Earth, including its formation and development, and the evolution, physics, chemistry, meteorology, and motion of celestial objects (such as galaxies, planets, etc.) and phenomena that originate outside the atmosphere of Earth (such as the cosmic background radiation).
Astrodynamics – application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft.
Astrometry – branch of astronomy that involves precise measurements of the positions and movements of stars and other celestially bodies.
Cosmology – discipline that deals with the nature of the Universe as a whole.
Extragalactic astronomy – branch of astronomy concerned with objects outside our own Milky Way Galaxy
Galactic astronomy – study of our own Milky Way galaxy and all its contents.
Physical cosmology – study of the largest-scale structures and dynamics of the universe and is concerned with fundamental questions about its formation and evolution.
Planetary science – scientific study of planets (including Earth), moons, and planetary systems, in particular those of the Solar System and the processes that form them.
Stellar astronomy – natural science that deals with the study of celestial objects (such as stars, planets, comets, nebulae, star clusters and galaxies) and phenomena that originate outside the atmosphere of Earth (such as cosmic background radiation)
Cryogenics – cryogenics is the study of the production of very low temperature (below −150 °C, −238 °F or 123K) and the behavior of materials at those temperatures.
Dynamics – study of the causes of motion and changes in motion
Econophysics – interdisciplinary research field, applying theories and methods originally developed by physicists in order to solve problems in economics
Electromagnetism – branch of science concerned with the forces that occur between electrically charged particles.
Geophysics – the physics of the Earth and its environment in space; also the study of the Earth using quantitative physical methods
Materials physics – use of physics to describe materials in many different ways such as force, heat, light and mechanics.
Mathematical physics – application of mathematics to problems in physics and the development of mathematical methods for such applications and for the formulation of physical theories.
Mechanics – branch of physics concerned with the behavior of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment.
Biomechanics – study of the structure and function of biological systems such as humans, animals, plants, organs, and cells by means of the methods of mechanics.
Classical mechanics – one of the two major sub-fields of mechanics, which is concerned with the set of physical laws describing the motion of bodies under the action of a system of forces.
Continuum mechanics – branch of mechanics that deals with the analysis of the kinematics and the mechanical behavior of materials modeled as a continuous mass rather than as discrete particles.
Quantum mechanics – branch of physics dealing with physical phenomena where the action is on the order of the Planck constant.
Thermodynamics – branch of physical science concerned with heat and its relation to other forms of energy and work.
Nuclear physics – field of physics that studies the building blocks and interactions of atomic nuclei.
Optics – branch of physics which involves the behavior and properties of light, including its interactions with matter and the construction of instruments that use or detect it.
Particle physics – branch of physics that studies the existence and interactions of particles that are the constituents of what is usually referred to as matter or radiation.
Psychophysics – quantitatively investigates the relationship between physical stimuli and the sensations and perceptions they affect.
Plasma physics – state of matter similar to gas in which a certain portion of the particles are ionized.
Polymer physics – field of physics that studies polymers, their fluctuations, mechanical properties, as well as the kinetics of reactions involving degradation and polymerisation of polymers and monomers respectively.
Quantum physics – branch of physics dealing with physical phenomena where the action is on the order of the Planck constant.
Statics – branch of mechanics concerned with the analysis of loads (force, torque/moment) on physical systems in static equilibrium, that is, in a state where the relative positions of subsystems do not vary over time, or where components and structures are at a constant velocity.
Solid state physics – study of rigid matter, or solids, through methods such as quantum mechanics, crystallography, electromagnetism, and metallurgy.
Vehicle dynamics – dynamics of vehicles, here assumed to be ground vehicles.
Chemistry
Chemistry – physical science of atomic matter (matter that is composed of chemical elements), especially its chemical reactions, but also including its properties, structure, composition, behavior, and changes as they relate the chemical reactions
Analytical chemistry – study of the separation, identification, and quantification of the chemical components of natural and artificial materials.
Astrochemistry – study of the abundance and reactions of chemical elements and molecules in the universe, and their interaction with radiation.
Cosmochemistry – study of the chemical composition of matter in the universe and the processes that led to those compositions
Atmospheric chemistry – branch of atmospheric science in which the chemistry of the Earth’s atmosphere and that of other planets is studied. It is a multidisciplinary field of research and draws on environmental chemistry, physics, meteorology, computer modeling, oceanography, geology and volcanology and other disciplines
Biochemistry – study of chemical processes in living organisms, including, but not limited to, living matter. Biochemistry governs all living organisms and living processes.
Agrochemistry – study of both chemistry and biochemistry which are important in agricultural production, the processing of raw products into foods and beverages, and in environmental monitoring and remediation.
Bioorganic chemistry – rapidly growing scientific discipline that combines organic chemistry and biochemistry.
Biophysical chemistry – new branch of chemistry that covers a broad spectrum of research activities involving biological systems.
Environmental chemistry – scientific study of the chemical and biochemical phenomena that occur in natural places.
Immunochemistry – branch of chemistry that involves the study of the reactions and components on the immune system.
Medicinal chemistry – discipline at the intersection of chemistry, especially synthetic organic chemistry, and pharmacology and various other biological specialties, where they are involved with design, chemical synthesis and development for market of pharmaceutical agents (drugs).
Pharmacology – branch of medicine and biology concerned with the study of drug action.
Natural product chemistry – chemical compound or substance produced by a living organism – found in nature that usually has a pharmacological or biological activity for use in pharmaceutical drug discovery and drug design.
Neurochemistry – specific study of neurochemicals, which include neurotransmitters and other molecules such as neuro-active drugs that influence neuron function.
Computational chemistry – branch of chemistry that uses principles of computer science to assist in solving chemical problems.
Chemo-informatics – use of computer and informational techniques, applied to a range of problems in the field of chemistry.
Flavor chemistry – someone who uses chemistry to engineer artificial and natural flavors.
Flow chemistry – chemical reaction is run in a continuously flowing stream rather than in batch production.
Geochemistry – study of the mechanisms behind major geological systems using chemistry
Aqueous geochemistry – study of the role of various elements in watersheds, including copper, sulfur, mercury, and how elemental fluxes are exchanged through atmospheric-terrestrial-aquatic interactions
Isotope geochemistry – study of the relative and absolute concentrations of the elements and their isotopes using chemistry and geology
Ocean chemistry – studies the chemistry of marine environments including the influences of different variables.
Organic geochemistry – study of the impacts and processes that organisms have had on Earth
Inorganic chemistry – branch of chemistry concerned with the properties and behavior of inorganic compounds.
Nuclear chemistry – subfield of chemistry dealing with radioactivity, nuclear processes and nuclear properties.
Radiochemistry – chemistry of radioactive materials, where radioactive isotopes of elements are used to study the properties and chemical reactions of non-radioactive isotopes (often within radiochemistry the absence of radioactivity leads to a substance being described as being inactive as the isotopes are stable).
Organic chemistry – study of the structure, properties, composition, reactions, and preparation (by synthesis or by other means) of carbon-based compounds, hydrocarbons, and their derivatives.
Petrochemistry – branch of chemistry that studies the transformation of crude oil (petroleum) and natural gas into useful products or raw materials.
Organometallic chemistry – study of chemical compounds containing bonds between carbon and a metal.
Photochemistry – study of chemical reactions that proceed with the absorption of light by atoms or molecules..
Physical chemistry – study of macroscopic, atomic, subatomic, and particulate phenomena in chemical systems in terms of physical laws and concepts.
Chemical thermodynamics – study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics.
Electrochemistry – branch of chemistry that studies chemical reactions which take place in a solution at the interface of an electron conductor (a metal or a semiconductor) and an ionic conductor (the electrolyte), and which involve electron transfer between the electrode and the electrolyte or species in solution.
Femtochemistry – Femtochemistry is the science that studies chemical reactions on extremely short timescales, approximately 10−15 seconds (one femtosecond, hence the name).
Mathematical chemistry – area of research engaged in novel applications of mathematics to chemistry; it concerns itself principally with the mathematical modeling of chemical phenomena.
Mechanochemistry – coupling of the mechanical and the chemical phenomena on a molecular scale and includes mechanical breakage, chemical behaviour of mechanically stressed solids (e.g., stress-corrosion cracking), tribology, polymer degradation under shear, cavitation-related phenomena (e.g., sonochemistry and sonoluminescence), shock wave chemistry and physics, and even the burgeoning field of molecular machines.
Physical organic chemistry – study of the interrelationships between structure and reactivity in organic molecules.
Quantum chemistry – branch of chemistry whose primary focus is the application of quantum mechanics in physical models and experiments of chemical systems.
Sonochemistry – study of the effect of sonic waves and wave properties on chemical systems.
Stereochemistry – study of the relative spatial arrangement of atoms within molecules.
Supramolecular chemistry – area of chemistry beyond the molecules and focuses on the chemical systems made up of a discrete number of assembled molecular subunits or components.
Thermochemistry – study of the energy and heat associated with chemical reactions and/or physical transformations.
Phytochemistry – strict sense of the word the study of phytochemicals.
Polymer chemistry – multidisciplinary science that deals with the chemical synthesis and chemical properties of polymers or macromolecules.
Solid-state chemistry – study of the synthesis, structure, and properties of solid phase materials, particularly, but not necessarily exclusively of, non-molecular solids
Multidisciplinary fields involving chemistry
Chemical biology – scientific discipline spanning the fields of chemistry and biology that involves the application of chemical techniques and tools, often compounds produced through synthetic chemistry, to the study and manipulation of biological systems.
Chemical engineering – branch of engineering that deals with physical science (e.g., chemistry and physics), and life sciences (e.g., biology, microbiology and biochemistry) with mathematics and economics, to the process of converting raw materials or chemicals into more useful or valuable forms.
Chemical oceanography – study of the behavior of the chemical elements within the Earth’s oceans.
Chemical physics – branch of physics that studies chemical processes from the point of view of physics.
Materials science – interdisciplinary field applying the properties of matter to various areas of science and engineering.
Nanotechnology – study of manipulating matter on an atomic and molecular scale
Oenology – science and study of all aspects of wine and winemaking except vine-growing and grape-harvesting, which is a subfield called viticulture.
Spectroscopy – study of the interaction between matter and radiated energy
Surface science – Surface science is the study of physical and chemical phenomena that occur at the interface of two phases, including solid–liquid interfaces, solid–gas interfaces, solid–vacuum interfaces, and liquid–gas interfaces.
Earth Science
Earth science – all-embracing term for the sciences related to the planet Earth. Earth science, and all of its branches, are branches of physical science.
Atmospheric sciences – umbrella term for the study of the atmosphere, its processes, the effects other systems have on the atmosphere, and the effects of the atmosphere on these other systems.
Biogeography – study of the distribution of species (biology), organisms, and ecosystems in geographic space and through geological time.
Cartography – study and practice of making maps or globes.
Climatology – study of climate, scientifically defined as weather conditions averaged over a period of time
Coastal geography – study of the dynamic interface between the ocean and the land, incorporating both the physical geography (i.e. coastal geomorphology, geology and oceanography) and the human geography (sociology and history) of the coast.
Environmental science – an integrated, quantitative, and interdisciplinary approach to the study of environmental systems.
Ecology – scientific study of the distribution and abundance of living organisms and how the distribution and abundance are affected by interactions between the organisms and their environment.
Freshwater biology – scientific biological study of freshwater ecosystems and is a branch of Limnology
Marine biology – scientific study of organisms in the ocean or other marine or brackish bodies of water
Parasitology – Parasitology is the study of parasites, their hosts, and the relationship between them.
Population dynamics – Population dynamics is the branch of life sciences that studies short-term and long-term changes in the size and age composition of populations, and the biological and environmental processes influencing those changes.
Environmental chemistry – Environmental chemistry is the scientific study of the chemical and biochemical phenomena that occur in natural places.
Environmental soil science – Environmental soil science is the study of the interaction of humans with the pedosphere as well as critical aspects of the biosphere, the lithosphere, the hydrosphere, and the atmosphere.
Environmental geology – Environmental geology, like hydrogeology, is an applied science concerned with the practical application of the principles of geology in the solving of environmental problems.
Toxicology – branch of biology, chemistry, and medicine concerned with the study of the adverse effects of chemicals on living organisms.
Geodesy – scientific discipline that deals with the measurement and representation of the Earth, including its gravitational field, in a three-dimensional time-varying space
Geography – science that studies the lands, features, inhabitants, and phenomena of Earth
Geoinformatics – science and the technology which develops and uses information science infrastructure to address the problems of geography, geosciences and related branches of engineering.
Geology – study of the Earth, with the general exclusion of present-day life, flow within the ocean, and the atmosphere.
Planetary geology – planetary science discipline concerned with the geology of the celestial bodies such as the planets and their moons, asteroids, comets, and meteorites.
Geomorphology – scientific study of landforms and the processes that shape them
Geostatistics – branch of statistics focusing on spatial or spatiotemporal datasets
Geophysics – physics of the Earth and its environment in space; also the study of the Earth using quantitative physical methods.
Glaciology – study of glaciers, or more generally ice and natural phenomena that involve ice.
Hydrology – study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability.
Hydrogeology – area of geology that deals with the distribution and movement of groundwater in the soil and rocks of the Earth’s crust (commonly in aquifers).
Mineralogy – study of chemistry, crystal structure, and physical (including optical) properties of minerals.
Meteorology – interdisciplinary scientific study of the atmosphere which explains and forecasts weather events.
Oceanography – branch of Earth science that studies the ocean
Paleoclimatology – study of changes in climate taken on the scale of the entire history of Earth
Seismology – scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies
Soil science – study of soil as a natural resource on the surface of the earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils; and these properties in relation to the use and management of soils.
Topography – study of surface shape and features of the Earth and other observable astronomical objects including planets, moons, and asteroids.
Volcanology – study of volcanoes, lava, magma, and related geological, geophysical and geochemical phenomena.
Biomechanics – often considered a branch of medicine, the study of the mechanics of living beings, with an emphasis on applied use through prosthetics or orthotics
Biophysics – study of biological processes through physics, by applying the theories and methods traditionally used in the physical sciences
Biotechnology – new and sometimes controversial branch of biology that studies the manipulation of living matter, including genetic modification and synthetic biology
Cell biology – study of the cell as a complete unit, and the molecular and chemical interactions that occur within a living cell
Conservation Biology – study of the preservation, protection, or restoration of the natural environment, natural ecosystems, vegetation, and wildlife
Chronobiology – field of biology that examines periodic (cyclic) phenomena in living organisms and their adaptation to solar- and lunar-related rhythms.
Cryobiology – study of the effects of lower than normally preferred temperatures on living beings.
Developmental biology – study of the processes through which an organism forms, from zygote to full structure
Embryology – study of the development of embryo (from fecundation to birth). See also topobiology.
Evolutionary developmental biology – field of biology that compares the developmental processes of different organisms to determine the ancestral relationship between them, and to discover how developmental processes evolved.
Paleobiology – discipline which combines the methods and findings of the natural science biology with the methods and findings of the earth science paleontology.
Paleontology – study of fossils and sometimes geographic evidence of prehistoric life
Morphology – In biology, morphology is a branch of bioscience dealing with the study of the form and structure of organisms and their specific structural features.
Sociobiology – study of the biological bases of sociology
Systematics – study of the diversification of living forms, both past and present, and the relationships among living things through time
Cladistics – method of classifying species of organisms into groups called clades, which consist of an ancestor organism and all its descendants (and nothing else)
Phylogeny – study of evolutionary relation among groups of organisms (e.g. species, populations), which is discovered through molecular sequencing data and morphological data matrices
Taxonomy – science of identifying and naming species, and arranging them into a classification.
Zoology – study of animals, including classification, physiology, development, and behavior
Arachnology – scientific study of spiders and related animals such as scorpions, pseudoscorpions, harvestmen, collectively called arachnids.
Acarology – study of the taxon of arachnids that contains mites and ticks
Malacology – branch of invertebrate zoology which deals with the study of the Mollusca (mollusks or molluscs), the second-largest phylum of animals in terms of described species after the arthropods.
Cetology – branch of marine mammal science that studies the approximately eighty species of whales, dolphins, and porpoise in the scientific order Cetacea.
Physics
Chemistry
Earth Science
Life Science
Biology