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How many fields are there in Science?

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75 scientific fieldsAcoustics The study of sound. Aeronautics Aircraft design, construction, and navigation. Agronomy science of soil management and crop production Anatomy The study of organisms and their parts. Anthropology The study of the origin, behavior, and the physical, social, and cultural development of humans. Archaeology The study of past human lives by examining remaining material evidence. Astronomy The study of outer space. Astrophysics The branch of astronomy that deals with the physics of stellar phenomena. Bacteriology The study of bacteria, especially in relation to medicine and agriculture. Biochemistry The study of the chemical substances and processes in living organisms. Biology The science of life and living organisms Botany The study of plants. Cardiology The medical study of the heart. Cartography The art or technique of making maps or charts. Chemistry The science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems. Cosmology The study of the physical universe considered as a totality of phenomena in time and space. Crystallography The science of crystal structure and phenomena. Ecology The study of organisms and their environment. Embryology The study of the formation, early growth, and development of living organisms. Endocrinology The study of the glands and hormones of the body. Entomology The scientific study of insects. Enzymology The study of the biochemical nature and activity of enzymes. Forestry The science and art of cultivating, maintaining, and developing forests. Gelotology The study of laughter. Genetics The study of heredity and inherited traits. Geochemistry The chemistry of the composition and alterations of the solid matter of the earth or a celestial body. Geodesy The geologic science of the size and shape of the earth. Geography The study of the earth and its features. Geology The scientific study of the origin, history, and structure of the earth. Geophysics The physics of the earth and its environment, including the physics of fields such as meteorology, oceanography, and seismology Hematology The study of the blood and blood-producing organs. Histology The study of the structure of animal and plant tissues. Horology The science of measuring time and making time pieces Hydrology The study of the properties and effects of water on earth. Ichthyology The study of fish. Immunology The study of the immune system of the body. Linguistics The study of language and phonetics. Mechanics Design, construction, and use of machinery or mechanical structures. Medicine The science of diagnosing and treating disease and damage to the body. Meteorology The study of weather and atmospheric conditions. Metrology The science of measurement. Microbiology The study of microorganisms and their effects on other living organisms. Mineralogy The study of minerals, including their distribution, identification, and properties. Mycology The branch of botany that deals with fungi. Neurology The study of the nervous system and disorders affecting it. Nucleonics The study of the behavior and characteristics of nucleons or atomic nuclei. Nutrition The study of food and nourishment. Oceanography The exploration and study of the ocean. Oncology The study of the development, diagnosis, treatment, and prevention of tumors. Optics The study of light and vision. Paleontology The study of prehistoric life through fossils. Pathology The study of disease and its causes, processes, development, and consequences. Petrology The study of the origin, composition, structure, and alteration of rocks. Pharmacology The science of the composition, use, and effects of drugs. Physics The science of matter and energy and interactions between the two. Physiology The study of the functions of living organisms. Psychology The study of the mental process and behavior. Radiology The use of radioactive substances in diagnosis and treatment of disease. Robotics The science of technology to design, fabrication, and application of robots. Seismology The study of earthquakes. Spectroscopy The study of radiant light. Systematics The science of systematic classification. Thermodynamics The study of relationships and conversions between heat and other forms of energy. Toxicology The study of poisons and the treatment of poisoning. Virology The study of viruses and viral diseases. Volcanology The study of volcanoes and volcanic phenomena. Zoology the study of the structure, physiology, development, and classification of animals.
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What are sub-fields of computer science?

68N: Software68P: Theory of data. Includes sorting(68P10). (For encryption, see 94A,Information and communication.)68Q: Theory of computing. For Turing machines see 03D10.68R:

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What are the major fields of Science?

The basic three fields of Science (used by most schools) are: Biology: the study of living things, Chemistry: matter and reactions, Physics: how the universe works. but
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Is applied science a field of science?

Applied science is not a field of science. It is an application of science. It means, now that we have used science to learn something about how the universe works, we would l