What is Sound?

What is the fundamental difference between longitudinal and transverse waves?

• Longitudinal waves have vibrations parallel to the direction of wave travel, while transverse waves have vibrations at right angles to the direction of wave travel.

• Longitudinal waves have vibrations in a straight line, while transverse waves have vibrations in a circular motion.

• Longitudinal waves have vibrations at right angles to the direction of wave travel, while transverse waves have vibrations parallel to the direction of wave travel.

• Longitudinal waves have vibrations in a circular motion, while transverse waves have vibrations in a straight line.

What is the propagating medium required for sound to travel?

• Water

• Air

• Solid

• Vacuum

What is the scientific definition of frequency?

• The number of wave disturbances that pass a given point in a specific amount of time

• The energy carried by a sound wave

• The distance between two wave crests

• The speed of sound in a medium

What is the unit used to express frequency?

• Watts

• Hertz

• Volts

• Meters

What is the frequency range of sounds that humans with normal hearing can detect?

• 20 Hz to 20 kHz

• 10 Hz to 15 kHz

• 30 Hz to 25 kHz

• 15 Hz to 30 kHz

What are frequencies above 20,000 Hz known as?

• Ultrasound

• Ultraviolet

• Infrasound

• Microwave

What do bats use ultrasonic vocalizations for?

• Communication

• Echolocation

• Navigation

• Hunting

What are very low-frequency sounds below 20 Hz known as?

• Microwave

• Ultrasound

• Ultraviolet

• Infrasound

What do elephants use infrasound for?

• Navigation

• Hunting

• Echolocation

• Communication

What is the rest position in a longitudinal wave?

• Region where the particles are closest together

• Region of less-than-normal air pressure

• Region of greater-than-normal pressure within the air

• Region where the particles are furthest apart