| A | B |
|---|
| amplify | to make a sound louder |
| apparatus | the materials we use to do a science experiment |
| code | a set of signals that stand for letters or numbers |
| decibels | the amount of energy in sounds is measured in decibels |
| hearing | the sense that we use to notice sounds |
| hypothesis | a predictin that can be tested about how a scientific investigation or experiment will turn out |
| inner ear | the inner most part of the ear |
| medium | the form of matter through which sound will travel |
| megaphone | a funnel-shaped object for making sounds louder and directing them |
| outer ear | a flap of flesh on each side of our heads which gathers sound vibrations & sends them to our brains |
| pitch | how high or low a sound is; the faster the vibratiion, the higher the pitch |
| property | a special quality or characteristic of an object tha helps us describe it |
| sound | a form of energy that you hear; it can move from one place to another |
| sound discrimination | the ability to identify sounds as different from each other |
| sound receiver | something that hears sounds |
| sound source | an object that is vibrating in a way that makes sound; it sends the sound to the receiver |
| sound transfer | sound moving from one point to another |
| stethoscope | an instrument for listening to sounds made in the body |
| vibration | to move back and forth rapidly; all sounds are caused by vibrations |
| volume | loudness or softness; a way to measure loudness or softness in a sound; the more energy, the louder the sound |
