CBSE Class 8 Science Sound Assignment Set B

CBSE Class 8 Science - Sound (2)

Chapter wise assignments are being given by teachers to students to make them understand the chapter concepts. Its extremely critical for all CBSE students to practice all assignments which will help them in gaining better marks in examinations. All assignments available for free download on the website are developed by the best teachers having many years of teaching experience in CBSE schools all over the country. Students, teachers and parents are advised to download the CBSE study material.

 

Q.1 How does a sound making object differ from one that is silent?

Q.2 How does sound from a sound producing body travel through air to reach our

ears?

Q.3 Why are the voices of men, Women and children different?

Q.4 Why a sound cannot be heard on the moon?

Q.5 How do astronauts talk to one another on the surface of moon and Why?

Q.6 If you want to hear a train approaching from far away, why is it more convenient

to put the ear to the track?

Q.7 State one observation from everyday life which shows that sound travels much

more slowly than light?

Q.8 What is the scientific name for the following?

The number of vibrations made per second.

Q.9 Why do we not hear the screams of a bat?

Q.10 Which of the following frequency of sound can be heard by a dog but not by a

man? {a} 50,000 hertz {b} 15,000 hertz

Q.11 Explain how, noise pollution {or excessive loud noise} is harmful to human

beings.

Q.12 State the various measures which can be taken to control {or reduce} noise

pollution in our surroundings.

Q.13 Give two causes of noise pollution from the homes.

Q.14 Sound of different pitch can be produced using a flute. Explain, how?

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