Science Sounds and Hearing

The frequency of infrasonic sound is below 20 Hz. The following animal that can hear infrasonic sound is ....

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Musical instruments above that can produce sound from vibrating strings are shown by ...

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Read the statements below.

I. Sound can be absorbed.

II. Sound cannot be reflected

III. Sound travel faster in solids than in gas

IV. Sound is a longitudinal waves

V. Sound cannot travel through gas

The correct properties of sound are shown by number...

• I, II, and III

• I, III and V

• I, III, and IV

• I, II and V

Tags

NGSS.MS-PS4-2

The following statement is correct about the use of ultrasonic sound is...

• To measure the blood pressure

• To check the internal human organs like the use of Ultrasonography (USG).

• To check body temperature

• To measure the speed of water

Tags

NGSS.HS-PS4-5

The frequency of ultrasonic sound is...

• Above 20.000 Hz

• Between 20 – 20.000 Hz

• Below 20 Hz

• Below 20.000 Hz

The part of the ear that is pointed by number 2 is used to...

• collect the soundwave

• connect the outer and middle parts or the ear

• connect the middle and inner parts

• keep the body balancear

The items that can reflect sound are...

• Ceramic

• Sponge

• Carpets

• Glass

Tags

NGSS.MS-PS4-2

Read the sentences below.

1. Sound enter the ear from the air.

2. The auditory nerves transmit the sound to the brain so thatwe can perceive sound.

3. The sound vibrate the ear drum

4. The sound vibrations are transmitted to the earbones and cochlea, until they reach

auditory nerves.

The correct way of how our ear works is shown by ...

• 1-2-3 and 4

• 1-2-4 and 3

• 1-3-4 and 2

• 1-4-3 and 2

The outer part of the ears are ...

• Ear canal

• Ear bones

• Earlobes

• Auditory nerve

The correct ways to care of ears are...

• Cleaning our ears using wet cotton buds.

• Cleaning ears everyday.

• Seeing the doctor to check if the ears are healthy.

• Using headset frequently