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Class 9 Science Chapter 12 Sound Quiz 7 (25 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Name Captain Von Trapp's youngest daughter.

Correct Answer: A) Gretl.

2. How is amplitude measured?

Correct Answer: D) Maximum displacement of a wave from its equilibrium position.

3. I heard the snake .....

Correct Answer: B) Hiss.

4. Speed of sound ..... with increase in temperature.

Correct Answer: A) Increases.

5. What letters make the long "a" sound in bake?

Correct Answer: D) A-e.

6. Which word has the same vowel sound as gave?

Correct Answer: B) Take.

7. Maria is planning to become a .....

Correct Answer: A) Nun.

8. The number of compression or rarefaction that cross per unit time .....

Correct Answer: A) Frequency.

9. Noise pollution has no effects on the health

Correct Answer: B) False.

10. The repeated reflection that results in the persistence of sound is

Correct Answer: B) Reverberation.

11. In the following sentence what word has the long /o/ sound?-I saw a blue sparrow yesterday.-

Correct Answer: C) Sparrow.

12. Discuss the importance of sound in communication.

Correct Answer: D) The importance of sound in communication lies in its ability to convey messages effectively, express emotions, emphasize key points, and ensure clarity in verbal interactions.

13. The speed of sound is highest in:

Correct Answer: A) Solids.

14. Which word has the same vowel sound as prize?

Correct Answer: B) Fine.

15. How does the speed of sound change with the change in medium?

Correct Answer: C) It changes due to the difference in the density and elasticity of the medium.

16. Who sings the song Climb Every Mountain?

Correct Answer: B) Mother Abbess.

17. Explain the concept of frequency in sound.

Correct Answer: C) Frequency in sound is the number of vibrations per second that a sound wave produces, measured in Hertz (Hz).

18. Home appliances that causes noise pollution.

Correct Answer: C) Both.

19. What happens to the speed of sound as the medium's density increases?

Correct Answer: B) The speed of sound increases.

20. Choose the word that begins with the initial sound /d/.

Correct Answer: B) Dog.

21. Frequency higher than ..... are called ultrasound

Correct Answer: D) 20kHz.

22. What letters make the long "a" sound in ladle?

Correct Answer: C) A.

23. The speed of sound increases as the density of the medium increases. Through which substance would sound waves travel the slowest?

Correct Answer: D) Air.

24. What is the initial sound in the word 'elephant'?

Correct Answer: A) /e/.

25. What word has the same middle sound as the word:shout?

Correct Answer: A) Pout.

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