Science Class VIII: Some Natural Phenomena - Chapter 15 Review
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Questions and Answers

What is the process of transferring charge from a charged body to a good conductor called?

  • Charging
  • Conducting
  • Neutralizing
  • Discharging (correct)
  • What is the term for the device used to protect buildings from the effect of lightning?

  • Electric shield
  • Lightning rod (correct)
  • Cloud protector
  • Thunder device
  • Which phenomenon results from rubbing or accumulation of opposite charges?

  • Lightning conductor
  • Lightning (correct)
  • Earthing
  • Discharging
  • What device is used to detect the presence of charge on an object?

    <p>Electroscope</p> Signup and view all the answers

    What occurs when lightning strikes high rise buildings or trees?

    <p>Shattering and fire setting</p> Signup and view all the answers

    What is the type of charge acquired by a glass rod when rubbed by a silk cloth?

    <p>Positive charge</p> Signup and view all the answers

    What are the two types of charges?

    <p>Positive charge and negative charge</p> Signup and view all the answers

    What happens when polythene and wool are rubbed?

    <p>Their electrons get accumulated at the surface</p> Signup and view all the answers

    What is the method of charging when a charged body touches an uncharged body?

    <p>Conduction</p> Signup and view all the answers

    Which type of objects acquire charge?

    <p>Charged objects</p> Signup and view all the answers

    What happens to an electrically neutral body when it is charged by induction?

    <p>Opposite charge is developed over the body</p> Signup and view all the answers

    What do substances like polythene and wool become when rubbed?

    <p>Charged objects</p> Signup and view all the answers

    What is the role of a lightning conductor in a building?

    <p>Provides easy route for electric charge to the ground</p> Signup and view all the answers

    What is the point deep underground from where an earthquake originates called?

    <p>Seismic focus</p> Signup and view all the answers

    How is the intensity of an earthquake expressed?

    <p>In terms of magnitude on the Richter scale</p> Signup and view all the answers

    Which statement about earthquake prediction is correct?

    <p>Earthquake prediction possibilities are still being researched</p> Signup and view all the answers

    What instrument is used to record seismic waves produced by tremors?

    <p>Seismograph or Seismometer</p> Signup and view all the answers

    What is the area more prone to earthquakes called?

    <p>Fault zone</p> Signup and view all the answers

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