Sound Wave Interactions

How does sonar detect an object in water?  6.P.1.1

• By sending sound waves that measure the object’s temperature

• By sending sound waves that are absorbed by the object

• By sending sound waves to detect the composition of the object

• By sending sound waves that reflect off the object

Tags

NGSS.MS-PS4-2

How do foam earplugs affect the sound a person hears?  6.P.1.3

• The foam reduces the rate of the sound vibration.

• The foam increases the rate of the sound vibration.

• The foam reduces the amount of energy in the sound vibrations.

• The foam increases the amount of energy in the sound vibrations.

Tags

NGSS.MS-PS4-2

Why are humans unable to hear ultrasound waves that are over 20,000 Hz?  6.P.1.3

• Ultrasound waves do not cause air to vibrate.

• Ultrasound waves have a frequency higher than what humans can hear.

• Ultrasound waves have an amplitude lower than what humans can hear.

• Ultrasound waves are only used underwater by dolphins and whales and humans can't hear under water.

Which unit is used to measure the intensity or loudness of sound?

• Hertz (Hz)

• Decibels (dB)

• Centimeters (cm)

• Milliliters (mL)

At what sound intensity should you start protecting your ears if you are listening for extended periods of time?

• 130 dB

• 70 dB

• 85 db

• 60 dB

Which animals have the best high frequency hearing?

• Adults over age 60

• Teenagers

• Dogs

• Dolphins

Tags

NGSS.MS-PS4-1

Sound is created by our vocal cords when they (a)   .

Tags

NGSS.MS-PS4-1

No two people have the same (a)   . Even twins sound different when they speak.

The doppler effect explains why the (a)   of the sound changes when the sound moves toward you and away from you.

What kind of pitch and intensity will person A hear compared to person B?

• The pitch will be lower; the intensity will be softer

• The pitch will be higher; the intensity will be softer

• The pitch will be lower; the intensity louder

• The pitch will be higher; the intensity louder

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2