Enjoy with Social Life-5 [106-136] - School Books Publishers India

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3. The construction of Suez Canal and the Panama Canal are useful for ocean transport. How Ans. Both the canals are useful for ocean transport because Suez Canal has shortened the distance between Mumbai and London by 9,700 kilometers while Panama Canal connects the Pacific Ocean with the Atlantic Ocean. 4. What are the advantages of water transport Ans. Waterways are the cheapest but slowest means of transport. They have promoted international trade to carry cotton, rubber, jute, wool, tobacco, etc. Now dairy products, meat and fish are also transported by refrigerated ships. 5. Which are the two oceans that are connected by the Panama Canal Ans. The Panama Canal connects the Pacific Ocean with Atlantic Ocean. 6. Which Indian trains are noted for their fast speed Ans. Rajdhani Express, Shatabdi Express, Taj Express, The Pink City Express are noted for fast speed. Project/Activity : G. Find out the names of the countries where our ships go. Ans. Do yourself. H. Mark the following on an outline map of the world : (a) Mumbai Airport (b) Panama Canal (c) Suez Canal (d) Sea route between Mumbai and London Ans. Do yourself. 9. Means of Communication Exercise A. Write True or False : 1. Television was invented by Marconi. False 2. Aryabhatta is not a satellite. False 3. UNI is an important news agency of India. True 4. The telegraph and the telephone are almost the same. False 5. The moon is an artificial satellite. False B. Fill in the blanks : 1. The word news itself refers to information gathered from all over the world. 2. The first ever wireless means of communication is Radio. 3. Newspapers are the most widely used means of communication. 4. The Morse Code uses dot and dash to communicate. 5. The radio works on wireless system of communication. C. Match the following : 1. Telegraph machine (a) Samuel Morse 2. Telephone (b) Alexander Graham Bell 3. Radio (c) Gutenberg 4. Television (d) Marconi 5. Printing Press (e) John Logie Baird 6. Satellite (f) INSAT-1B 118 Bookman India Enjoy with Social Life [1-5]
D. Write two lines about each of the following : 1. Satellite - A satellite in an object that moves around a planet. The moon is the natural satellite of the earth. 2. Internet - Internet is a facility by which people can surf the world wide web. 3. Telegram - Telegraph was invented by Samuel Morse in 1837 by which messages could be sent to distant places quickly with the help of wires. 4. Hot lines - Telephone lines connecting the governments of various countries are called hot lines. E. Answer the following questions : 1. What is meant by communication Ans. Communication means share or exchange information or ideas with others. 2. How are mobile phones useful to us Ans. Mobile phones can carry voice of the people over long distances. They are wireless and enable us to make calls while we are traveling. 3. How is a telephone is different from a telegram Ans. Telephone Telegram 1. Fastest means of communication Slow means of communication. 2. Cordless and mobile phones are Telegraph wires are used to send available. message. 3. It can carry voice or messages in It can carry messages only in written form. written form. 4. How do newspaper collect news Ans. All the countries have their own news agencies. They gather news and send them to all parts of the world. UNI and PTI are famous Indian news agency. 5. What is an artificial satellite How does it work Ans. An artificial satellite is a man-made object that continuously orbits the earth or some other body in the space. It carry cameras and other machines which receive and transmit pictures and messages from all parts of the world. 6. Why is television called the window of the world Ans. Television has brought the people of the world very close to oneanother, so it is called the 'Window of the world'. Project/Activity : F. Try to send messages to your friends through E-mail. Ans. Do yourself. G. Learn to consult a telephone directory. Ans. Do yourself. H. Find out what is a courier service How does it work Ans. Do yourself. 119 Bookman India Enjoy with Social Life [1-5]
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