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Sound

4th grade science

QuestionAnswer
What is pitch? how high or low a sound can be. It is effected by the sound of a wave
How can you increase the pitch of a sound? increase the frequency by making the strings longer or shorter and thicker or thinner. You can also add more mass to effect the frequency.
What is frequency? the number of crest/troughs in a soundwave that occur over a given amount of time.
How can you increase the frequency? Change the length of the object being struck.
What is an oscilloscope? A machine that shows a 3D image of a soundwave.
What does an oscilloscope show? It records the frequency, amplitude, and pitch of a sound wave.
Sound is a form of _________________ energy
What types of waves are created when there is a soundwave? Longitudinal waves
In what conditions do sound waves travel faster? warmer conditions
In what conditions do sound waves travel slower? cooler conditions
When do we not hear sound at all? empty space. Outer space is a vacuum and we hear no sound.
Describe the process starting with soundwave until the signal reaches the brain. Vibration occurs, making a soundwave. Wave travels to outer ear and into ear canal. Ear drum vibrates, striking 3 smallest bones in body. Causes bones to vibrate, traveling to cochlea. vibrates tiny hairs, transfer to auditory nerve signal to brain.
what are the three smallest bones in the body? hammer, anvil, and stirrup
What is an echo? when a soundwave bounces off of a smooth hard surface
What is a vibration? the rapid movement back and forth or up an down
Describe the trough and crest of a wave crest is highest point of the soundwave, the trough is the lowest point of a soundwave
What is amplitude? related to volume, how loud or soft a sound can be. It is the distance between the crest and the resting point or the trough and the resting point of a sound wave
What is wavelength? the distance between one crest to the next or from one trough to the next trough.
Created by: shannonbacha
 

 



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