SOUND

Sound happens when there are things … .

• Hit soft materials

• Bounce

• move

• vibrate

The animals that can hear ultrasonic sound are numbers …

• 1 and 3

• 2 and 4

• 1 and 2

• 2 and 3

Based on the table, the air inside of the music instrument on numbers … vibrates when they produce sound.

• 1 and 2

• 2 and 4

• 1 and 3

• 3 and 4

A sound which has frequency 20-20.000 Hz and audible to humans is called … .

• Audiosonic

• Infrasonic

• Ultrasonic

• Videosonic

The type of sound based on the characteristics above is …

• audiosonic sound

• infrasonic sound

• ultrasonic sound

• videosonic sound

Caused by vibrations. They are invisible. They move outward from its source

• Sound waves

• Trolls

• Reflect

• Vibration

The perception of how high or low a sound is ...

• frequency

• pitch

• wavelength

The distance between a point on one wave and the nearest point just like it is called

• wavelength

• pitch

• frequency

The number of wavelengths that pass by a point each second is called ...

• wavelength

• pitch

• frequency

Sound with frequencies below the low end limit of 20 Hz is called _____

• infrasonic

• ultrasonic

• supersonic