Worlds of Science and Nature

Astronomy

Astronomy is the science dealing with all the celestial objects in the universe, including the planets and their satellites (e.g. our Earth and the moon), comets and meteors, the stars (including our sun), and interstellar matter, the star systems known as galaxies, and clusters of galaxies. Astrophysics, Cosmology, Galaxies, History, Radio, SETI, Solar, Stars, Telescope, UFO

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Biology

The science of life and living organisms, biology studies the form, structure, function, growth and development, behavior and interaction of all living things. Biologists study the characteristics of life forms, such as their cellular organization and development, how they respond to stimulation, the chemical processes of their growth and production of energy (metabolism) and how they reproduce. Biochemistry, Bioinformatics, Biophysics, Biotechnology, Botany, Cells, Ecology, Genetics, Human, Microbiology, Paleontology.

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Chemistry

Chemistry is the branch of science concerned with the properties, structure, and composition of substances and their reactions with one another. There are two main divisions, organic and inorganic. Chemical elements are the fundamental materials of which all matter is composed. An element is a pure substance that cannot be broken down or reduced further without changing its properties. Analytical, Crystallography, Elements, Inorganic, Organic

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History of Science

This article addresses modern science, by which we mean science as we now understand it; e.g. making use of the scientific method of controlled experimental verification of hypotheses. Before the 1500s, it was typically thought that the natural world could be understood by invoking supernatural deities, or by simplistic (and sometimes, not so simplistic) theories founded on casual observation and 'common sense' - e.g. that the Earth was the center of the Universe, because one could plainly see that the heavenly bodies (sun and planets) rotated about the Earth.

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Mathematics

Mathematics is the study of numbers, sets of points, and various abstract elements, together with relations between them and operations performed on them. Originally mathematics was concerned with the properties of numbers and space, as the science of quantity, whether of magnitudes, as in geometry, or of numbers, as in arithmetic, or the generalization of these two fields, as in algebra. Algebra, Analysis, Applied, Calculus, Chaos, Fractals, Game Theory, Games, Geometry, Graphs, History, Infinity, Logic, Measurement, Number

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Physics

Physics is the study of matter, energy, motion, and forces. Physics is a major branch of science, concerned with the fundamental components of the universe, the forces they exert on one another, and the results produced by these forces. Physicists study the properties and forms of matter and energy - heat, light, electricity and magnetism, and nuclear energy. They try to understand the forces that act in the universe, and the laws that these forces obey - e.g. matter and energy can't be destroyed, only changed from one to the other (a conservation law). Electricity, Light, Machines, Magnetism, Mechanics, Nuclear, Optics, Quantum, Relativity, Thermodynamics, Waves

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