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24 Week Assessment

Waves and Sounds

Sound travels as what type of wave? longitudinal
The speed of sound depends on density / temp / elasticity
What happens to the sirens sound as it is racing towards you? the frequency increases it doesn't get louder
The science of sound is called acoustics
A wave travels through a medium because energy passes particle to particle
Musical instruments have a certain sound quality or timbre
What system is used to detect objects under water? SONAR
Sound waves through water in which intense cleaning takes place uses what process? ultrasonic
What process is used in medicine where they send sound waves through the body to get an image? ultrasound
A disturbance that transfers energy from place to place is called a wave
The bending of waves due to a change in speed is called refraction
The bending of waves around the edge of a barrier is known as diffraction
The interaction between two waves that meet is called interference
Waves combine to make a wave with larger amplitude in a process called constructive interference
When an incoming wave combines with a reflected wave in such a way that the combined wave appears to standing wave
What occurs when vibrations traveling through an object matches the object’s natural frequency? resonance
Frequency is measured in units called Hertz / Hz
When a wave hits a surface through which it CANNOT pass and bounces back, it undergoes reflection
Waves combine to produce a smaller or zero-amplitude wave in a process called destructive interference
Why do you see lightning from a distant storm before you hear thunder? Light travels faster than sound
The speed of sound will travel the fastest in warmer or colder weather? warmer
The pitch of sound depends on frequency
Sounds of frequencies below 20 Hz are called infrasound
Sounds of frequencies above 20,000 Hz are called ultrasound
For stringed instruments you can change the pitch by changing what? length / tightness / thickness / temp
The intensity of sound is measuring its energy
Change in frequency of a sound wave due to the motion of an object is called Doppler
Created by: huizenga