MCQ & Fill in the Blanks (with Solution) - Sound, Science, Class 8 | EduRev Notes

Science Class 8

Class 8 : MCQ & Fill in the Blanks (with Solution) - Sound, Science, Class 8 | EduRev Notes

The document MCQ & Fill in the Blanks (with Solution) - Sound, Science, Class 8 | EduRev Notes is a part of the Class 8 Course Science Class 8.
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Q 1. A sound wave travels from east to west, in which direction do the particles of air move?
(A) East – west                           
(B) North - south
(C) Up and down                         
(D) None of these
Q 2. In which medium sound travels faster ?
(A) Solid                                     
(B) Liquid
(C) Gas                                      
(D) None of these
Q 3. What is the name of short duration wave?
(A) Pulse                                    
(B) Frequency
(C) Time period                           
(D) Velocity
 Q 4. What is the velocity of sound in water at room temperature?
(A) 1500 m/s                              
(B) 330 m/s
(C) 1500 km/s                             
(D) 330 km/s
 Q 5. The unit of quantity on which pitch of the sound depends is :
(A) Hertz                                    
(B) metre
(C) metre/second                        
(D) second
Q 6. The unit of quantity on which loudness of found depends is :
(A) metre                                   
(B) Hertz
(C) metre/second                        
(D) second 
Q 7. Nature of sound wave is :
(A) transverse                             
(B) longitudinal
(C) electromagnetic                      
(D) seismec
Q 8. Pitch of high frequency sound is :
(A) high                                     
(B) low
(C) zero                                     
(D) infinite
Q 9. Voice of a friend is recognized by its :
(A) Pitch                                     
(B) quality
(C) Intensity                               
(D) velocity 
Q 10. Sound waves in air are :
(A) Longitudinal waves                  
(B) Radio waves
(C) Transverse waves                            
(D) Electromagnetic waves 
Ans: . 1-A  2-A  3-A  4-A  5-A  6-A  7-B  8-A 9-B 10-A
 
Objective:  Fill in the blanks:
1. Pitch is the sensation  of the ---------- of an emitted sound.
2. A high pitch sound is called a ------ sound
3. A low pitch sound is called a -----------  sound.
4. Loudness of sound wave is directly proportional to -------- amplitude
5. The sound energy transferred per unit area per unit time is called -------- of sound.
6. When a body moves with a speed which is greater than the speed of sound in air, it is said to be traveling at --------------
7. When wound waves traveling in air enter into the medium of water, ------- remains unchanged
8. Sound travels faster as the  ------------ of the medium increases by 0.61 m/s with every 1 deg C
9. ----- is an apparatus which is used to find the depth of a sea or to locate the under water things.
10. A sound wave of single frequency is called ---------
Ans:
1. Frequency
2. shrill
3. hoarse
4. Square
5. intensity
6. supersonic speed
7. Frequency
8. temperature
9. Sonar
10.Tone
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