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Sissel Roll NoSaraswati Shishu/Vidya Mandir H.S. School, , PRE Examination -2021-22, SUBJECT- SCIENCE CLASs- 8", 1. Multiple choice question (MCQs), tick (v) the correct option, , , , , , (A). One of the following activity is not an example of force,, (2). Kicking ( (2). Throwing ( _)(3).Sleeping( _) (4). Eating, , (8). Sound in a flute is produced due to vibrations of the,, ) (3). Stretched membrane (_) (0). None of the above( ), , , , , (1). Strings (__) (2). Air column (, (C). The non-metal which is a good conductor of electricity,, (1), Chlorine (— ) (2).Graphite( —_) (3). Oxygen(—_) (4). Nitrogan(_), 2. Fill in the blanks. MiMed:, (A).The of the fish help to reduce the friction., (B).It is easier to roll an object then to, (C).The audible sounds range from ., (D). Rolling a log by an elephant is a force., 3. Answer in one word. MM-2, (A). In which medium does the sound travel fastest?, (8). Write the full form of LED?, (C). What is the name given to the friction present is air and liquids?, (0) .A good conductor of electricity?, MM 12, , 4. Write ‘T’ for true and ‘F for false statements:, (A). The LED in the electrical tester glows up only if there is high current in the circuit. (, , ), (B). Frequency less then 20Hz is called ultrasonic sound. Cy, (C). Picking up the bag is an example of gravitational force. (), , 5. Answer the following question. (Short answer). M.M.- at, , (A). What happen when a heavy box is moved by two man from the opposite sides with the same, , force?, (8). what do you mean by the pitch of a sound?, , (C). what do you understand by static friction?, 6. Answer the following question any one, (Long answer). Mm. 34, (A) Whatare the uses of electroplating? OR :, (8) What are the harmful effects of noise pollution? What preventive measures can be adopted, , to minimise this pollution?