III. Very short answer: ( 5 x 2 = 10 )
11. What is called hearing?
12. What are the harms of Noise pollution?
13. Define vibration
14. Which part of human body is responsible for producing sound?
15. What are the 2 important properties of sound?
IV. Short answers: ( 5 x 3 = 15 )
16. The sound from a mosquito is produced when it vibrates its wings artan average rate of
500 vibration per second. What is the time period of the vibration?
17. What is the difference between noise and music? Can music become noise sometimes?
18. What are audible and inaudible sounds?
19. How is that you can hear a friend talking in another room without seeing them?
20. A pendulum oscillates 40 times in 4 second. Find its time period and frequency.
V. Long answers: ( 3 x 5 = 10 )
21. a) Why is the voice of men, women and children are different?
b) How do birds and insects produce sound?
22. Explain with an activity that sound can travel through water.
23. Explain loudness and pitch with an activity
Answers
Answered by
0
Answer:
hearing means to listen that some person is saying something to us
Answered by
3
Answer:
it is very long yarrrrrr
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