worksheet 16


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Worksheet 9

             M ATERIALS : M ETALS AND N ON- M ETALS DATA   BASED   ACTIVITY : Aim of the survey : To identify and classify the materials commonly used at home into metals and non-metals.    FORMATE OF THE REPORT 1)    Aim of the survey. 2)    Introduction with purpose. 3)    Methods used for survey. 4)    Information. 5)    Interpretation of data 6)    Conclusion. 7)    Reference.
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Worksheet 10

             C OMBUSTION AND F LAME Answer the following   Questions. 1.     What is Combustion? 2.     Name the petroleum product used for surfacing of roads. 3.     What is ignition temperature?    4.     Name the unit in which the calorific value of a fuel is expressed.   5.     What do you mean by fossil fuel? 6.     How coal is formed from dead vegetation. What is this process called ? 7.     What is Acid Rain? 8.     Where do we get coal from and how is it formed? 9.     Why fossil fuels are exhaustible natural resources? 10.                        What are the advantages of using CNG and LPG as fuel? 11.                        Name the different   types of combustion. 12.                        How do we control Fire? 13.                        How does the burning of a candle differ from the burning of coal? 14.                        Define ignition temperature. 15.                        Which product formed when charcoal bu
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Worksheet 5

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                     LIGHT Select and write the most appropriate alternative [A,B,C,D] from those given below each statement . 1.     The angle of reflection is the angle between A] The incident ray and the normal B] The incident ray and the reflecting surface C] The incident ray and the reflected ray D] The reflected ray and the normal 2.     The angle between the incident ray and the reflected ray is 40°.Therefore the angle of incidence is A] 40°                                                                       B] 80° C] 90°                                                                       D] 20° 3.     A coin is kept between two mirrors kept vertically at an angle of 60°. The number of images of the coin, that will be seen, are A] 1                                                                               B] 2 C] 4                                                                                D] 5 4.     The amount of l
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