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1) Read the text about Alexander Graham Bell and do the tasks.
| Alexander Graham Bell is widely known as the inventor of the first telephone. He was born on March 3rd, 1847 in Edinburgh, Scotland. When he was 23, Bell emigrated to Canada with his parents and the next year moved to the United States to teach deaf-mute children. He took great interest in transmitting the human voice. With his colleague Thomas Watson, Bell worked very hard on the experimentation to invent devices such as the harmonic telegraph (used to send multiple messages over a single wire) and phonautograph (used to draw the shape of the sound waves). The first telephone communication was said to have happened between Bell and Watson in 1876 while Bell was at one end of the line, and Watson worked on the telephone in another room. The first transmitted words were, ʻMr Watson, come here. I want to see you.ʼ |
a) Decide if statements are True (T) or False (F)
| T | F | ||
| 1. |
Alexander Graham Bell is Scottish. |
||
| 2. |
He spent all his life in Canada. |
||
| 3. |
He worked with the deaf when he moved to the USA. |
||
| 4. |
He wanted to create a device that can transmit human voices. |
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| 5. |
He was able to succeed right from the first experiment. |
||
| 6. |
He worked on his inventions all by himself. |
b) Answer these following questions
1. What is Bell's ʻharmonic telegraphʼ?
2. What is Bell's ʻphonautographʼ?
3. When did the first communication over the telephone happen and how did it happen?
ĐÁP ÁN:
1a)
| 1. T | 2. F | 3. T | 4. T | 5. F | 6. F |
1b)
1.Harmonic telegraph is used to send multiple messages over a single wire.
2. ‘Phonautograph’ is used to draw the shape of the sound waves.
3. The first telephone communication was between Bell and Watson in 1876. Bell was at one end of the line and Watson was working in another room. The first transmitted words were, “Mr Watson, come here. I want to see you.”
