true or false.[1 Mark each]

Question 11 Mark

The Eardrum moves inward when a rarefaction reaches it.

Answer

False.
Correct statement: The Eardfum moves outward when a rarefaction reaches it.

Question 21 Mark

Ultrasonic sounds cannot be heard by the Human beings.

Answer

true

Question 31 Mark

The direction of incident sound, direction of reflected sound and the normal are in different Planes.

Answer

False.
Correct statement: The direction of incident sound, direction of reflected sound and the normal are in same plane.

Question 41 Mark

The speed of sound in a gaseous medium depends on the nature of gas.

Answer

true

Question 51 Mark

Pitch is a general term for the distinguishable characteristic of a tone.

Answer

false.
Correct statement: Timbre is general term for the distinguishable characteristic of a tone.

Question 61 Mark

The small to and fro motion is called vibration.

Answer

true

Question 71 Mark

Vibrating particles travel all the way from vibrating object to ear. ,

Answer

False.
Correct statement: Vibrating particles do not travel all the way from vibrating object to ear.

Science true or false.[1 Mark each]