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Physical science is the study of physics and chemistry of nature. From the materialist and functionalist viewpoints it overlaps the life sciences where ecology studies the evidences of historical facts or evolution. Natural sciences bridge the phenomena in the physical sciences to the noumenon in the life sciences. The following is presented as an overview and topical guide of these physical sciences.
The foundations of the physical sciences rest upon key concepts and theories, each of which explains and/or models a particular aspect of the behavior of nature.
Physics, along with mathematics and chemistry, classes as one of the "fundamental sciences" because the other natural sciences (like biology, geology etc.) deal with systems that seem to obey the laws of physics. According to physics, the physical laws of matter, energy and the fundamental forces of nature govern the interactions between particles and physical entities (such as planets, molecules, atoms or the subatomic particles). Some of the basic pursuits of physics, which include some of the most prominent developments in modern science in the last millennium, include:
(Note: Astronomy should not be confused with astrology, which assumes that people's destiny and human affairs in general correlate to the apparent positions of astronomical objects in the sky - although the two fields share a common origin, they are quite different; astronomers embrace the scientific method, while astrologers do not.)
Chemistry, built upon concepts from physics, addresses phenomena associated with the structure, composition and energetics of matter as well as the changes it undergoes. Often known as the central science, chemistry connects the fundamental laws of physics to engineering and other natural sciences such as biology, earth science, astronomy and material science
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