Energy cannot be created or destroyed in an isolated system, according to the rule of conservation of energy, a fundamental tenet of physics. It can only switch from one form to another instead. Numerous tests and observations have led to the same conclusion, which is supported by this principle: the total quantity of energy in a closed system is constant across time. The understanding of the behaviour of the universe is fundamental to the idea of energy conservation. Energy is a basic concept that can take on many different forms, including kinetic energy, which is related to motion, potential energy, which is related to position or configuration, thermal energy, which is related to temperature, chemical energy, and many others. Energy may change forms when transformations take place within a system, but the overall amount of energy does not. For instance, when a ball is tossed upward, its potential energy rises as it ascends, despite the fact that its kinetic energy reduces as it slows down. The ball's potential energy diminishes as it returns to the earth, but as it speeds, its kinetic energy grows. Understanding the behaviour of the world, from macroscopic occurrences to tiny particle interactions, depends critically on the conservation of energy. Numerous studies and observations have supported it, and it serves as the foundation for many scientific and engineering applications. The idea of energy conservation still serves as a cornerstone of modern physics despite advancements in our understanding of the cosmos. Have a great day Craig