
Effective Communication Means: Satellite to Mobile Phones
Learn about the various means of communication such as magazines, satellites, radios, and mobile phones. Explore the advantages of using different communication tools and understand the evolution of communication technology over time. Discover the role of media in providing news and entertainment, and how artificial satellites help transmit information worldwide.
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Presentation Transcript
Ch-13 Means of Communication
Fill in the blanks- a) Magazine and newspapers give us news about events that take place in our country and around the world. b) The artifical satellite helps transmit radio and t.v programmes instantly all over the world. c) Radio and T.V programmes entertain us and enrich our knowledge. d) People in the earlier times did not have mobile phone and computer.
State true/false a) The letters are collected by a delivery boy from the post box. (F) b) Computers have made communication easier and so much fun. (T) c) In earlier times , dried palm leaves were used to record events or write stories. (T) d) A stamp is pasted on an envelope before posting it. (T)
Answer the following questions- Q1.Write two advantages of having a mobile phone. Ans.1- Mobile phones are very handy and can be carried easily. 2. We can send messages using short message service (SMS). Q2. Write full form of STD and ISD. Ans. 1-STD- Subscriber Trunk Dialling 2-ISD- International Subscriber Dialling
Q3. For what purpose is the Fax machine used? Ans. A fax machine is used for sending written messages, letters or even photographs instantly. Q4. How are radios and T.V useful to us? Ans. Radios and T.V programmes entertain us and enrich our knowledge. E.g.- we can learn about new places, sports, plants etc.
Q5. What are artificial satellites and how do they can help us? Ans. Artificial Satellites are human-built objects. These are sent space to revolve around the earth, like the moon and send information back to earth. These satellites help us transmit radio and T.V programmes instantly all over the world.