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_______.

Tags

NGSS.MS-PS4-1

No two people have the same _____. Even twins sound different when they speak.

The doppler effect explains why the _____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