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What is Energy? The simplest definition of energy is "the ability to do work". Energy is how things change and move. It's everywhere around us and takes all sorts of forms. It takes energy to cook food, to drive to school, and to jump in the air. Different forms of Energy Energy can take a number of different forms. Here are some examples:
A very important law in physics is the Law of Conservation of Energy. The Law of Conservation of Energy states that: Energy can neither be created nor destroyed, but only changed from...
The movement of energy through an ecosystem can be illustrated using an energy pyramid. Changes to the Laws of Conservation. With the introduction of the theory of relativity in 1905, mass was recognized as equivalent to energy. This means that energy can be converted to mass and vice versa.
One basic law about energy is called the law of conservation of energy. This law states that energy cannot be created or destroyed. It also states that energy can neither appear out of nowhere nor vanish into nowhere.
One of the best-known definitions of energy is the classical definition used in physics: Energy is the ability to do work. Physicists define work in a way that does not always agree with the average person’s idea of work.
In National 5 Physics investigate the conservation of energy law; examine how gravitational potential and kinetic energy relate when items fall from height.
If energy can’t be created or destroyed, what can it do? Learn more about what energy is and how it really works with this BBC Bitesize guide.
