Chapter- 20 Unfriendly Nature
1. What are natural disasters?
Ans: Natural d isasters are sudden changes in the environment that cause damage and destruction.
2. Name four types of natural disasters.
Ans: Earthquakes, droughts, landslides and cyclones.
3. Have you ever experienced an earthquake?
Ans: It is a personal answer. (Yes / No)
4. When did the Gujarat earthquake occur?
Ans: On 26th January, 2001.
5. Where did the earthquake take place?
Ans: In Gujarat.
6. How many people were killed in the Gujarat earthquake?
Ans: More than 13,000 people.
7. How many people were injured in the earthquake?
Ans: At least 15 lakh people.
8. How many houses were destroyed in the earthquake?
Ans: About 7.8 lakh houses.
9. Which city is mentioned in the lesson?
Ans: Ahmedabad.
10. What happened to high-rise buildings during the earthquake?
Ans: They crumbled and cracked.
11. What is an earthquake?
Ans: An earthquake is a series of shocks caused by sudden movements below the earth’s surface.
12. Why do earthquakes take place?
Ans: Earthquakes take place when large plates of land collide and release energy.
13. What is released when plates of land collide?
Ans: Energy.
14. How is the strength of an earthquake measured?
Ans: By the Richter scale.
15. Which instrument measures earthquakes?
Ans: Seismograph.
16. What should you do during an earthquake for safety?
Ans: Bend down under a desk or cot and stay there till the shocks stop.
17. Why should we stay away from glass windows during an earthquake?
Ans: Because glass may break and cause injury.
18. What should you do if you are outside during an earthquake?
Ans: Move away from trees, buildings, signboards and electric poles.
19. What should drivers do during tremors?
Ans: Stop driving.
20. Should we push others during an earthquake?
Ans: No, we should not push others.
21. Why should we not stand under fans?
Ans: Fans may fall and cause injury.
22. Should we use lifts during an earthquake?
Ans: No, we should not use lifts.
23. Why should we not light fires during an earthquake?
Ans: Because gas leaks may cause fire accidents.
24. Should we rush out of stadiums during an earthquake?
Ans: No, we should not rush out.
25. Why should we not travel immediately after an earthquake?
Ans: Roads and bridges may be damaged.
26. Is an earthquake a natural disaster?
Ans: Yes.
27. What damage does an earthquake cause?
Ans: Loss of life, injury and destruction of houses.
28. What lesson does the Gujarat earthquake teach us?
Ans: We should be careful and prepared for natural disasters.
29. What kind of buildings are unsafe during earthquakes?
Ans: Improperly built buildings.
30. How can we stay safe during earthquakes?
Ans: By following safety rules and staying calm.
Answer by Dimpee Bora
