In what ways is lightning useful?

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?