Page 203 - Science Class 08

5. ________________ of an earthquake is the point on the earth’s surface that is directly
above the focus.
C. Write True or False.
1. Lightning generally occurs during the thunderstorm.

2. A house or a building is a safe place to protect ourselves from lightning.
3. One should unplug television codes during the thunderstorm.
4. Focus is the point on the earth’s surface from where seismic waves originate.

5. An increase of 2 in magnitude shown by a Richter Scale means 1000 mes
more destruc ve energy.

D. Very short answer ques ons.
1. What is lightning?
2. What do you mean by Ritcher Scale?
3. Define lightning conductors.

4. Have you ever experienced the earthquake?
E. Short answer ques ons.
1. What is lightning?

2. What will you do to protect yourself from lightning if you are in an open field?
3. What is earthquake?
4. What is epicentre?
5. What is seismograph?

6. Name the scale used to measure the intensity of earthquake.
F. Long answer ques ons.
1. What precau ons should we take to protect ourselves from lightning if we are outside our
homes?
2. How does a lightning conductor work?

3. Why is earthquake more devasta ng?
4. Write the causes of earthquake.
5. Write the working of a seismograph.
6. Name the seismic zone of India.

7. What preven ve measures should we take to protect ourselves from an earthquake if we
are at home during the earthquake?

Project ActivityActivityActivity
Project
Project
Project Activity
A. Make a list of high prone areas of earthquake.
B. Aware the people to take precau ons before and during the earthquake.

HO
HO
HOTSTSTS
HOTS
The rod of a lightning conductor accidently broke from middle and bent down. What danger will
this cause if lightning strikes the building? Why?

Science-8 203