| A | B |
|---|
| kinetic energy | Any energy that involves movement (particles or objects) |
| sound energy | A type of kinetic energy where particles collide, causing a compression (longitudinal) wave |
| light energy | Electromagnetic radiation; can travel in vacuum of space; transverse wave. |
| colours | Our eyes percieve/see different visible light wavelengths as colours |
| radio | A type of electromagnetic radiation with very long wavelengths |
| gravitational potential energy | Stored energy due to being higher than a lower surface |
| chemical potential energy | Stored energy in the chemical bonds between atoms e.g. in food or fuel |
| work | force x distance; work uses energy to move objects so is measured in Joules (J); symbol W |
| power | Work done over a set time period; unit is Watts (W) |
| dispersion | Spreads out e.g. different wavelength refract at different angles and spread out to form rainbow |
| refraction | Light is slowed down by denser media (substances) and so changes the angle it travels at (bends) |
| lens | A transparent object that is often used to refract light e.g. e.g. disperse or focus light |
| Joules (J) | The unit for energy and work |
| Watts (W) | The unit for power |
| mass (m) | how much matter is in an object; measured in kg |
| speed (v) | how fast something is moving from place to place |
| waves | energy moving from place to place; represented by diagrams with crests and troughs in repeating cycles |
| transverse wave | Moves side to side or up and down with respect to start and finish points |
| longitudinal wave | Compression wave; moves along from start to finish points |
