HARD
8th CBSE
IMPORTANT
Earn 100

Draw a labelled diagram of a gold-leaf electroscope. Describe how you will use it to detect a charge, measure a charge and find the nature of the charge.

Important Questions on Some Natural Phenomena

MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 14 - Some Natural Phenomena>EXERCISES>Q E
Explain how an earthquake happens.
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 14 - Some Natural Phenomena>EXERCISES>Q E
List three things that you will do during an earthquake. 
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 14 - Some Natural Phenomena>EXERCISES>Q 1
Why are taller buildings in greater danger of being struck by lightning?
HARD
8th CBSE
IMPORTANT
Living Science 8>Chapter 14 - Some Natural Phenomena>EXERCISES>Q 2
When a positively charged body is brought near an uncharged metal rod, the part of the rod near the charged body acquires a negative charge, and the far side a positive charge. Can you say why this happens? Remember that in a body, negative charges are mobile whereas positive charges are fixed.
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 14 - Some Natural Phenomena>EXERCISES>Q 3
If you hold a plastic comb in your hand and rub it in your hair, it will be charged. However, if you do the same with a metal comb it will not get charged. Why? But if the metal comb has a plastic handle and how you hold it from the handle, it will also get charged. Why?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 14 - Some Natural Phenomena>EXERCISES>Q 4
Why do you think charging by rubbing happens best in dry weather?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 14 - Some Natural Phenomena>EXERCISES>Q 5
The rod of a lightning conductor accidentally broke into two from the middle. What danger will it pose if lightning strikes the building? Why?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 14 - Some Natural Phenomena>ORAL QUESTIONS>Q 4
Air is an insulator, but can conduct electricity under certain conditions. What are these conditions? What is conduction of electricity through air called?