Physical science is the study of the inorganic world. That is, it does not study living things. (Those are studied in biological, or life, science.) The four main branches of physical science are …

A distinction may be drawn between an observational science like astronomy, where the phenomena studied lie entirely outside the control of the observer, and an experimental …

Principles of physical science - Scientific Method, Experiments, Observations: It is nowadays taken for granted by scientists that every measurement is subject to error so that repetitions of …

Principles of physical science - Conservation, Extremal, Laws: It is a consequence of Newton’s laws of motion that the total momentum remains constant in a system completely isolated from …

Physical chemistry, branch of chemistry concerned with interactions and transformations of materials. Unlike other branches, it deals with the principles of physics underlying all chemical …

The numerical values of the physical constants depend on the system of units in which they are expressed. For example, the speed of light can be expressed (approximately) as …

Principles of physical science - Concepts, Attitudes, Methods: Newton’s law of gravitation and Coulomb’s electrostatic law both give the force between two particles as inversely proportional …

For example, waves travel faster in deep water than in shallow. If an ocean wave approaches a beach obliquely, the part of the wave farther from the beach will move faster than the part …

For example, What were the physical and chemical conditions operating on Earth and the Moon 3.5 billion years ago? How did the oceans form, and how did their chemical composition …

In the biomedical sciences, physical (material) models, such as Drosophila flies and the nematode Caenorhabditis elegans, are used to investigate the functions of genes and proteins.