Worksheet of 13 to 14

Worksheet of 13 to 14 SANT SR' ASARAMn INDORE 5tJB'ECT : scr€NCE CLASS : 8 N.me which are bad the on which the loudness o' the uoon. or vinegar Conduct Condi_ætOt Of W'hV electroplating used? How iron can be protected from Corrosion? Why it is dangerous to touch an electrical•pp'iance With wet hand? What is 9— Why chromium plating is done on car parts? We add small amount of dilute hydrochloric acid diqilted the resulting will be Conductor or poor conductor? We add small amount Ot caustic soda to distilled the resulting So'ution be conductor? 23. - 24. 16. 20. 21. 22. 23. 25. 26 How can we check whether a tester is working not? What are the two important properties Of sound? Why noise pollution is harmful for us? Define vacuum. • What is vibration? What are vibrating parts of Flute? Why the fiiament Of bulb does not get heated sometimes a circuit? • Wh•,' Eater that we get from ponds and hand pumps are always good conductors? • What happens when electrodes are immersed in voter and a current is passed? Differentiate between conductors and insulators. How is sound produced? How does sound travel from one place to another? Explain via an activity that sound travels in liquids. Explain the functioning of human ear. Which of the two a man or a woman win oroduce sound with higher oitch and whv?

Dear student,
Q1.Some materials which are bad conductors of electricity are:
1. Air
2. Wood
3. Plastic
4.Rubber
5. Glass

Q2.The factor on which loudness of sound depends is amplitude of the vibration which produce the sound.
More is the amplitude of sound, the louder is the sound produced.

Kindly post another questions in separate thread to be answered by experts.
Regards

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