Std 4 EVS SCERT [Lesson 10-Very Far A Little Far]
Lesson 10
Very Far A Little Far
1.Write the means of communications used in past?
*Trained Pigeons
*Perumbara
*Doothan
*Anchalottakkaran
2.What all could be the reason for the changes in the field of communication?
*Less expensive
*faster
*More Conventient
3. What are the different means of communication used now a day ?
*Letter
* telephone
*SMS
*fax
*walkie-talkie
*computer
4. Classify the means of communication on the basis of nature of message transfer
5.What is meant by the terms mass media?
*Mass Media refers to the medium of communication that transfer an information to a large number of people of same time.
6. Some of the means of communication we used till recent times, do not exit now. Why?
*As better device have been discovered some of the earlier devices have been discarded.
7. What are the field in which growth of the means of communication have been benifical?
*weather
forecasting
*Live telecast
* Cyber investigation
* Mobile banking
8. Write the limitation of message of communication which were used in the past?
*Very slow
* More expensive
*available limited place
*Less clarity in communication
9. E-mail has came instead of Letter.
Complete the following list of communication devices in the same manner?
*Radio -- Television
*Letter -- E-mail
* Telephone -- Mobile
Phone
10. Letter and Phone are two means of communication. Compare the two means of communication.
11.What are the advantages of e-mail when compered to letter?
*Letter would takes several days to reach the address. But in the e-mail the message can be read at any place and replies can be immediately.
12.How does the voice reach the listener through the mobile phone?
*There are signal tower both near caller and listener, satellites are receiving their signals are sending by waves to the listener.
13.Prepare a note on the information technology?
*Communication technology is progressing rapidly. This help in forecasting, climate change and natural calamities. It helps us to know information from any part to the world and pass them to other even sitting in our own houses.
14. News paper
*News paper is one of the most popular media of mass communication. It bring important news from any part of the world
15.Computer
16 .Telegraph
In the past years telegraphs was used for sending messages very quickly.
17.Radio
Radio was introduced by a scientist named Marconi .Radio was used for hearing news, entertainment etc.
18.Television
T.V is very popular with every section of people. It is audio visual means of communication.
19. Internet
It connect computers in different part of the world to provide information.
20 Fax
Fax can send the true copy to any part of the world
immedietly.
Fax can . phone message
21.Telephone
Telephone invented by an American Scientist named Alexander Graham Bell. It helps a person to talk with another person far away.
22. Mobile phone
It is easy to carry them. It to all the services required which included playing games, taking photo graphs, exchanging messages..etc
24.walkie talkie
Policeman used this device almost it always alert to maintain law and order and national Security. It was the first mobile device.
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