Energy

Energy is a fundamental physical quantity that signifies the ability of a system to perform work or produce change. It is present in various forms, including kinetic energy (the energy of motion), potential energy (stored energy based on position), thermal energy (related to temperature), chemical energy (stored in bonds between atoms), and more. Energy can be transformed from one form to another but cannot be created or destroyed, a principle known as the conservation of energy. In scientific contexts, energy is measured in joules (J) in the International System of Units (SI). Energy plays a crucial role in physical, chemical, and biological processes and is essential in driving systems, ranging from the simplest machines to complex ecosystems.