Quantum mechanics branch of physics dealing with phenomena at scales of the order of the Planck constant
Big Bang theoretical past period when the Universe was much hotter, denser and rapidly expanding
Plate tectonics scientific theory that describes the large-scale motions of Earth's lithosphere
Newton's laws of motion Classical formulation of Mechanics by Isaac Newton, consisting of three simple laws. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.