Science Practice Quiz 253

Q1.Why do we slip when we step on a banana peel?

A. Due to the force of gravity B. Due to the force of friction C. Due to the smooth surface of the banana peel D. Due to the rough surface of the banana peel

Q2.What is the force that opposes relative motion between two surfaces in contact?

A. Force of gravity B. Force of magnetism C. Force of electricity D. Force of friction

Q3.What happens to a book when it is gently pushed on a table?

A. It moves forever B. It stops after moving for some distance C. It jumps up in the air D. It moves in a circular path

Q4.Which part of the human body, also called the larynx, produces sound when we speak?

A. voice box (larynx) B. trachea C. esophagus D. diaphragm

Q5.Loudness of sound is proportional to which power of the amplitude of vibration?

A. the first power of the amplitude B. the square of the amplitude C. the cube of the amplitude D. the fourth power of the amplitude

Q6.Which part of a Veena vibrates to produce sound?

A. Stretched string B. Stretched membrane C. Air column inside the instrument D. Metal plate struck by a hammer

Q7.What is the unit used to express frequency?

A. Hertz B. Newton C. Joule D. Pascal

Q8.How many trees were saved by the use of EVMs in the 2004 general elections?

A. Around 1,50,000 trees B. Around 50,000 trees C. Around 2,00,000 trees D. Around 1,00,000 trees

Q9.How much paper would have been required to print ballot papers for the 2004 general elections if EVMs were not used?

A. About 8,000 tons B. About 5,000 tons C. About 10,000 tons D. About 12,000 tons

Q10.Which of the following is a demand made on forest land mentioned in the text?

A. Timber for construction of houses and railways B. Forest land for tourism C. Forest land for wildlife parks D. All of the above

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Science Practice Quiz 253