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EE Sect 7 Sound
Exploration Education Section 7 Sound Study Guide
| Question | Answer |
|---|---|
| Sound | A form of energy produced by vibrations that can be heard |
| Vibration | A back-and-forth motion that produces sound |
| Sound Wave | A wave that carries sound energy through matter |
| Medium | The material (such as air, water, or solids) through which sound travels |
| Frequency | The number of vibrations per second |
| Hertz (Hz) | The unit used to measure frequency |
| Pitch | How high or low a sound is, based on frequency |
| Volume | How loud or soft a sound is |
| Amplitude | The height of a sound wave, which determines loudness |
| Echo | A sound that is reflected and heard again |
| Reflect | To bounce sound off a surface |
| Absorb | To take in sound energy instead of reflecting it |
| Transmit | To pass sound energy through a medium |
| Compression | The part of a sound wave where particles are close together |
| Sound | Energy produced by vibrations that we can hear |
| Vibration | A back-and-forth motion that produces sound |
| Sound Wave | A wave that carries sound energy through a medium |
| Medium | The material (air, liquid, or solid) through which sound travels |
| Frequency | The number of vibrations per second (how fast something vibrates) |
| Hertz (Hz) | The unit used to measure frequency |
| Pitch | How high or low a sound is |
| Volume | How loud or soft a sound is |
| Amplitude | The height of a sound wave; relates to loudness |
| Echo | A reflected sound heard again after bouncing off a surface |
| Reflect | To bounce off a surface |
| Absorb | To take in energy (like sound) instead of reflecting it |
| Transmit | To pass sound energy from one place to another |
| Compression | The part of a sound wave where particles are close together |
| Rarefaction | The part of a wave where particles are spread apart |
| Longitudinal Wave | A wave where particles move back and forth in the same direction as the wave |
| Speed of Sound | How fast sound travels through a medium |
| Vacuum | A space with no matter where sound cannot travel |
| Eardrum | A part of the ear that vibrates when sound waves hit it |
| Cochlea | A part of the inner ear that helps convert vibrations into signals for the brain |
| Amplify | To make a sound louder |
| Muffle | To reduce or soften a sound |
| Decibel (dB) | A unit used to measure sound intensity (loudness) |
| Noise | Unwanted or unpleasant sound |
| Noise Pollution | Harmful or disturbing levels of noise in the environment |
| Ultrasound | Sound waves with frequencies higher than humans can hear |
| Infrasound | Sound waves with frequencies lower than humans can hear |
| Resonance | When an object vibrates at its natural frequency |
| Oscilloscope | A device used to display sound waves visually |
| Communication | The process of sending and receiving information (often using sound) |
| Which statement best describes sound energy? | Sound is energy produced by vibrating matter and travels through a medium (like air, water, or solids). |
| What directly causes sound when a guitar string is plucked? | The vibration of the string produces sound waves. |
| Which scenario best demonstrates vibration? | A pendulum moving back and forth repeatedly shows vibration (back-and-forth motion). |
| How are sound waves different from objects? | Sound waves transfer energy without permanently moving matter from one place to another. |
| In which situation is a medium required? | Sound traveling between two people requires a medium because sound needs matter to travel through. |
| Why can sound not travel through a vacuum? | There are no particles in a vacuum to transmit sound vibrations. |
| What happens when frequency increases? | The pitch increases (the sound becomes higher). |
| What does a measurement in Hertz (Hz) represent? | The number of vibrations (cycles) per second. |
| How can pitch be changed? | By changing frequency—for example, tightening a guitar string increases pitch. |
| What produces the highest pitch? | An object vibrating rapidly (high frequency), such as a small string vibrating quickly. |
| What is the main difference between a whisper and a shout? | Amplitude—shouts have greater amplitude, making them louder. |
| What happens when amplitude increases? | The sound becomes louder (greater volume). |
| What causes an echo? | Reflection of sound waves off a surface, causing the sound to be heard again. |
| Why do materials like carpet reduce noise? | They absorb sound energy instead of reflecting it. |
| What happens during a compression in a sound wave? | Particles are pushed close together, creating a high-pressure area. |
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