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Waves and SoundWaves and Sound
SOL PS8SOL PS8
Remember the topics we Remember the topics we discussed about waves. Can discussed about waves. Can you describe the meaning of you describe the meaning of
the following?the following?
1. vibration1. vibration
2. waves carry energy forward2. waves carry energy forward
3. energy3. energy
4. longitudinal waves4. longitudinal waves
5. frequency5. frequency
Today you will be learning Today you will be learning more about waves and how more about waves and how they produce sound. After they produce sound. After you watch the upcoming you watch the upcoming
video, you will answer video, you will answer questions on a worksheet questions on a worksheet about things you learned about things you learned
about sound.about sound.
SO PLEASE PAY SO PLEASE PAY ATTENTION!!ATTENTION!!
What causes all What causes all sounds?sounds?VibrationsVibrations
What are some things What are some things that might vibrate to that might vibrate to
make a sound?make a sound?
1. rubber bands1. rubber bands
2. guitar string2. guitar string
3. vocal cords3. vocal cords
4. air4. air
What determines if the What determines if the sound is loud or soft?sound is loud or soft?
The amount of energy used The amount of energy used to create the sound!!to create the sound!!
A greater force - a louder A greater force - a louder sound sound
A small force – a softer A small force – a softer soundsound
What does the term What does the term “frequency” mean?“frequency” mean?
The number of times per The number of times per second that something second that something vibratesvibrates
Can we hear sounds of Can we hear sounds of all different frequencies?all different frequencies?
No. Humans can not hear No. Humans can not hear sounds below 20 Hz or above sounds below 20 Hz or above 20,000 Hz20,000 Hz
Complete the short Complete the short worksheet you are given worksheet you are given
as a quiz on this as a quiz on this material !material !
Hand it in when you are Hand it in when you are finished. finished.
