Page 109 - Genius Kidz Prudence Learning Sc-8

Activity 1

Explain the working of a gold leaf electroscope along with a diagram.
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LIGHTNING CONDUCTORS EARTHQUAKE AND RELATED TERMS

Lightning conductor is a device used to protect Definition : Sudden vibration or shaking of the
tall buildings from the effect of lightning. A earth crust or surface is called an earthquake.
metallic rod taller than the building is installed
in the walls of the building during its
construction. One end of the rod is kept in the
air while the other is buried deep into the

ground. The rod provides easy route for the
transfer of electric charges to the ground thus
keeping the building safe.

Seismic origin or Seismic focus or hypocentre:
This is the point within the earth or mantle
where sudden shifting of rocks takes place
Lightining conductor on a Building
during an earthquake.

Earthquakes have a very long history but the most damaging one was of Tangshan, China at 4 A.M. on July 28, 1976. It
measured 8.2 on the Richter scale.

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