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Year 9 Waves Energy
Year 9 Science Waves and Energy Vocabulary
| Term | Definition |
|---|---|
| Energy | The ability to do work or make something happen |
| Chemical potential energy | Energy stored in the bonds between atoms |
| Gravitational potential energy | Energy stored in objects due to their height above the ground |
| Elastic potential energy | Energy stored in stretched or squashed objects |
| Kinetic energy | Energy due to an object’s motion |
| Electrical energy | The movement of electrically charged particles |
| Heat energy | Caused by the movement of atoms and found inside all hot objects |
| Sound energy | Energy produced by vibrating objects |
| Amplitude | The height of a wave, measured from the rest position |
| Frequency | The number of waves that pass a point in one second |
| Wavelength | The distance between two crests or troughs of a wave |
| Sound | Vibrations that can be detected by the ears |
| Light energy | A type of energy which has wavelengths that can be detected by the eyes |
| Reflection | Occurs when light changes direction and ‘bounces off’ a surface |
| Refraction | Occurs when light changes direction (‘bends’ or refracts) when it passes from one substance to another (e.g. air to water) |
| Concave | A surface which curves inwards |
| Convex | A surface which curves outwards |
| Mirror | A surface which reflects a clear image |
| ROYGBIV | The order of the colours which make up white light (red, orange, yellow, green, blue, indigo, violet) |
| Opaque | An object which blocks light |
| Transparent | An object which allows all light to pass through |
| Translucent | An object which allows some light to pass through |
| Shadow | An area that light cannot travel to because it is being blocked by an opaque object |
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