| A | B |
|---|
| Amplitude | height of crest or trough |
| Wavelength | distance from crest to crest (or any two identical points on neighboring waves) |
| Frequency | number of waves passing point in a second |
| Hertz | unit for frequency |
| Hz | abbreviation for Hertz |
| Speed | distance a wave travels in one unit of time |
| Formula for wave speed | Wavelength x Frequency |
| Reflection | Wave hits something and bounces back |
| Refraction | bending of wave as it changes speed after entering a different medium |
| Example of Reflection | Echo in canyon |
