Year 8 Energy Vocabulary

2. A representation of an object or event
6. transformation A change from one form of energy to another
8. energy Energy that is stored and held in readiness
12. transfer energy moves from one object to another without changing form
13. efficiency The percentage of energy put into a system that does useful work
14. energy Energy obtained after being changed by a process
17. relationship A relationship that has a straight line graph
18. A measure of the amount of matter in an object
19. diagram A model that shows how energy is transferred and transformed
20. a unit for measuring energy.
22. potential energy a name used to describe energy when it is stored in stretched or squashed things that can stretch back to their original shape. Another name for 'strain energy'.
24. energy energy transferred by sound.
25. energy a term used to describe energy when it is stored in moving things.
26. potential energy (GPE) energy stored when an object is lifted upwards.

1. relationship A relationship between two variables that does not produce a straight line on a graph.
3. energy energy that is not usefully transferred.
4. a unit for measuring energy intake or expenditure. 1000 J = 1 kJ
5. energy useful energy + waste energy
6. energy energy transferred when an electric current flows.
7. something that is needed to make things happen or change.
9. potential energy a term used to describe energy when it is stored in chemical substances. Food, fuel and batteries all store chemical energy.
10. energy energy transferred by light.
11. energy Energy put into a system or device.
15. energy energy transferred to where it is wanted in the way that is wanted.
16. of conservation of energy the idea that energy can never be created or destroyed, only transferred from one form to another.
21. how fast an object is moving
23. energy a term used to describe energy when it is stored in hot objects. The hotter something is, the more thermal energy it has. Sometimes called 'heat energy'.