Activity of text interpretation, aimed at fifth-year students, about optical fibers. why they revolutionized communication? Let's find out? So, read the explanatory text carefully! Then answer the various interpretative questions proposed!
You can download this text comprehension activity in an editable Word template ready to print to PDF and also the answer activity.
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Text Interpretation – Optical Fibers – 5th Grade – Word
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Why did fiber optics revolutionize communication?
Ah! What would communication be without optical fibers... Telephony, cable TV, computer networks and transmission of data, medical-surgical instruments and sensors are just a few examples of systems that use fibers optics!
We can say that optical fibers are very thin strands made of a special type of glass surrounded by two layers of plastic material. Light signals pass through such glass threads, carrying, for example, audio and video data. It's like that…
When we talk on the phone, our voice is transformed into electrical signals that are transmitted to a telephone exchange, where are converted into light signals by a photo-emitter and sent, through an optical fiber, to another central, where they are converted by a photodetector into electrical signals, which are sent to the phone we're talking to, where they are turned back into voice.
Explained step-by-step, the data transmission process via fiber optics seems slow, but it is extremely faster, more light and has a far greater range of transmitted signal than, for example, copper cables, which dominated telecommunications until recently back.
Today, therefore, the transmission of data, images, sounds and signals is more efficient because of optical fibers. In addition to their high ability to transmit various types of information, they are also immune to electromagnetic interference, this means that there is no loss of clarity in the image, voice, etc.
So, are they or are they not revolutionary?
Fábio Luís Alves Pena. “Ciência Hoje das Crianças” magazine. Edition 271.
Available in: .
Question 1 - In “[…] optical fibers are very thin threads made of a special type of glass surrounded by two layers of plastic material.”, the author of the text:
( ) defines optical fibers.
( ) presents an opinion about optical fibers.
( ) presents a question about optical fibers.
Question 2 - In the segment “[…] they are sent to the phone we are talking to, where they are transformed again in voice.”, the highlighted word indicates:
( ) place.
( ) mode.
( ) time.
Question 3 - According to the author of the text, "the process of data transmission via optical fibers seems slow",
( ) however “he is extremely faster”.
( ) because “he is extremely faster”.
( ) so “he is extremely faster”.
Question 4 – Reread this text fragment:
"Today, therefore, the transmission of data, images, sounds and signals is more efficient because of optical fibers.”
The term underlined introduces:
( ) a condition.
( ) a conclusion.
( ) a comparison.
Question 5 - Underline the word that takes up the following optical fibers:
“[…] they are also immune to electromagnetic interference […]”
Question 6 – In the passage “[…] that it means that there is no loss of clarity of the image, voice, etc. signals.”, the highlighted word:
( ) retrieves information.
( ) announces information.
( ) complements information.
Question 7 – The author talks directly to the reader in the following excerpt:
( ) "Through such glass strands are light signals passing [...]"
( ) “[…] copper cables, which dominated telecommunications until recently.”
( ) “So, are they or are they not revolutionary?”
By Denyse Lage Fonseca
Graduated in Languages and specialist in distance education.
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