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9 Energy
| Term | Definition |
|---|---|
| Chemical energy | energy stored within a substance such as fuel or food that may be released when the substance is burnt or digested |
| Elastic potential energy | energy stored within a stretched or compressed object, like a spring or elastic material |
| Electrical energy | energy that causes charged particles to move |
| Energy | the ability to make a change happen; different forms include heat energy, light energy and sound energy |
| Gravitational potential energy | stored energy of an object that is held above the Earth’s surface |
| Heat energy | a measure of the total kinetic energy possessed by particles in a substance |
| Joule (J) | unit of measurement for energy |
| Kinetic energy | energy possessed by a moving object |
| Light energy | form of energy that is visible, such as that produced by the Sun |
| Nuclear energy | energy stored inside an atom |
| Potential energy | stored energy possessed by an object, such as elastic potential energy of a squashed spring |
| Sound energy | energy that travels as vibrating waves and can be heard by our ears as sound |
| Work | this is done whenever an object is moved or is forced to change shape |
| Energy efficiency | the proportion of useful energy output from a device compared to the amount of energy that is input. This is usually expressed as a percentage |
| Energy flow diagram | diagram using arrows that shows the way energy is passed on or changed into other forms in a particular situation |
| Energy transfer | the flow of energy from one object into another object; for example, the flow of heat from a metal spoon to your hand, or the flow of kinetic energy from a bat to a ball that it hits |
| Energy transformation | the conversion of one type of energy into another type of energy; for example, the conversion of electrical energy used in an MP3 player into sound, light and heat energy |
| Law of conservation of energy | Energy cannot be created or destroyed. It can only be transferred from one object to another or transformed into another form of energy. |
Created by:
Bsutton22
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