Page 29 - Science and Technology Std 3
P. 29
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We have seen that air, water, cotton string and an iron rod
transmit sound. Therefore, sound can be transferred in solid
objects, liquids, and air.
FOR ONLINE USE ONLY
Exercise 1
1. What is energy?
2. Write three forms of energy.
(i) ________________
(ii) ________________
(iii) ________________
3. What is sound energy?
4. Mention two sources of sound.
(i) ________________
(ii) ________________
5. Mention three natural sources of sound.
(i) ________________
(ii) ________________
(iii) ________________
6. Mention three artificial sources of sound.
(i) ________________
(ii) ________________
(iii) ________________
7. List uses of sound.
(i) ________________
(ii) ________________
(iii) ________________
(iv) ________________
8. A reflected sound is called _______________.
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PROPERTY OF UNITED REPUBLIC OF TANZANIA GOVERNMENT
Ministry of Education, Science and Technology
Science and Technology 3.indd 22 03/08/2019 11:01
