NCERT TEXTBOOK QUESTIONS SOLVED
Q.1. What is a seismograph? Where is it usually kept in your city? If you live in a village, can you find out where the nearest seismograph is kept?
Ans. Aseismo graph is aninstrument that records waves caused during an earthquake. It is usually kept at geological centres.
Q.2. How would you prevent bleeding from a wound on the arm?
Ans. To prevent bleeding from a wound, one should apply pressure with cotton and bandage.
Q.3. What precautions should one take when one enters a building that has cracked or collapsed because of an earthquake?
Ans. When one enters a building collapsed after an earthquake, one should keep away from walls, beware of aftershocks and save survivors quickly.
Q.8. Are there Ham Radio Operators in your village or area? Find out more about Ham Radio.
Ans. Amateur radio, often called ham radio, is both a hobby and a service in which participants, called “hams,” use various types of radio communications equipment to communicate with other radio amateurs for public service, recreation and self-training. Amateur radio operators enjoy personal (and often worldwide) wireless communications with each other and are able to support their communities with emergency and disaster communications if necessary, while increasing their personal knowledge of electronics and radio theory. An estimated six million people throughout the world are regularly involved with amateur radio.