Class 8 English

Chapter 5 — Science and Curiosity

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Overview

Summary

Unit 5 of NCERT Class 8 English (Poorvi), "Science and Curiosity", brings together three texts united by a sense of wonder at the natural and scientific world: the science-fiction story "Feathered Friend" by Arthur C. Clarke, in which a canary smuggled aboard a space station ends up saving the crew's lives; the poem "Magnifying Glass" by Walter de la Mare, which celebrates the power of a lens to reveal hidden marvels in ordinary things; and a biographical article on Bibha Chowdhuri, India's first woman physicist, tracing her pioneering work on cosmic rays and pi-mesons and her quiet legacy that inspired generations of women in Indian science.

Unit 5, "Science and Curiosity", in NCERT Class 8 Poorvi weaves together three distinct texts. Arthur C. Clarke's "Feathered Friend" is a humorous science-fiction story set on a space station, where construction worker Sven Olsen secretly keeps a canary named Claribel. When Claribel collapses, the narrator realises the air purifier has failed—just as miners once used canaries to detect gas—and the crew is saved. Walter de la Mare's poem "Magnifying Glass" celebrates how a simple round glass transforms a scrap of chalk into myriad shells, an inch of moss into a forest, and even makes the moon feel within reach. The unit closes with a biographical essay on Bibha Chowdhuri, born in Kolkata in 1913, who became India's first woman to excel in high-energy particle physics, discovered pi-mesons, was nominated for a Nobel Prize in 1950, and became the first woman faculty member at TIFR, with a star in the constellation Leo named 'Bibha' in her honour in 2019.

Essentials

Key points & formulas

  1. 01"Feathered Friend" by Arthur C. Clarke is a science-fiction story in which space-station construction worker Sven Olsen smuggles a yellow canary named Claribel aboard, partly out of scientific curiosity to see how a bird behaves in the absence of gravity.
  2. 02Claribel quickly adapts to weightlessness, performing backward loops and flying with minimal effort; she becomes a general pet loved by the whole crew.
  3. 03When a rare eclipse causes part of the air purifier to freeze and the single alarm circuit fails, Claribel collapses—alerting the narrator, who recalls the mining tradition of using canaries to detect dangerous gas, saving the crew from suffocation.
  4. 04Walter de la Mare's poem "Magnifying Glass" shows how a round glass reveals a myriad of shells in a scrap of chalk, a forest in an inch of moss, a hive of bees in a drop of water, and the intricate spinning of a spider's web from its spinnerets, ending with the idea that similar lenses make the moon seem reachable in an afternoon.
  5. 05The biographical essay on Bibha Chowdhuri, born in Kolkata in 1913, traces how she became India's first woman physicist, earned her Ph.D. on cosmic rays at the University of Manchester under Nobel Laureate Patrick M. S. Blackett, and discovered pi-mesons—a subatomic particle.
  6. 06Bibha Chowdhuri was nominated for a Nobel Prize in 1950 by Erwin Schrödinger, became the first woman faculty member at the Tata Institute of Fundamental Research (TIFR) in 1949 selected personally by Homi J. Bhabha, and continued her research at TIFR, the Physical Research Laboratory in Ahmedabad, and the Saha Institute of Nuclear Physics in Kolkata.
  7. 07In 2019, the International Astronomical Union honoured Bibha Chowdhuri by renaming a star in the constellation Leo—HD 86081—as 'Bibha', meaning 'beam of light'; in 2020 the Government of India declared a chair professorship in her name.
Questions

Frequently asked questions

01

Why did Sven Olsen bring a canary to the space station in "Feathered Friend"?

According to the story, Sven smuggled Claribel aboard the last ferry from Earth partly out of scientific curiosity—he wanted to see how a bird would operate when it had no weight but could still use its wings. His choice was also practical: Claribel weighed practically nothing, her food requirements were tiny, and she was not worried by the absence of gravity, unlike most animals.

02

How does Claribel adapt to life in zero gravity on the space station?

Claribel adapts quickly and impressively. She hangs motionless in the air with her wings quietly folded at her sides, learns to operate in the absence of gravity without doing unnecessary work, and performs a curious backward loop that no earthbound canary had ever managed. She thrives and grows fat on the station.

03

How does Claribel save the crew in "Feathered Friend"?

When the air purifier partially freezes during a rare eclipse of Earth's shadow and the single alarm circuit fails to go off, Claribel collapses. The narrator, recalling the old mining practice of carrying canaries to warn of gas, realises something is wrong with the air and alerts the duty engineer Jim. Jim investigates and confirms the malfunction—without Claribel, the crew would soon have been dead.

04

What caused the air purifier to fail on the space station?

The story explains that the station had one of its rare eclipses by Earth's shadow that night; part of the air purifier froze up as a result, and the single alarm circuit in the system failed to go off. The second alarm circuit had not yet been connected, so there was no backup warning.

05

What is the central idea of the poem "Magnifying Glass" by Walter de la Mare?

The poem celebrates the transformative power of a magnifying glass, showing how close observation through a round lens reveals extraordinary hidden detail in ordinary things: a myriad of shells in a scrap of chalk, a forest in an inch of moss, a hive of bees in a drop of water, and the intricate claws and web-spinning of a spider. The poem ends with the idea that lenses like it could make the moon feel within reach in an afternoon.

06

Which poetic devices does Walter de la Mare use in "Magnifying Glass"?

The poem uses simile (a drop of water 'like hive of bees'), alliteration (forest—flowers), metaphor ('Magic talk' for what the glass reveals), personification (the glass making 'Magic talk'), and visual imagery throughout—describing the spider's 'tigerish claws' and the flies that stumble into his net 'with all those eyes'. The poem has six stanzas of four lines each (quatrains) with an ABCB rhyme scheme.

07

Who was Bibha Chowdhuri and why is she significant in Indian science?

Bibha Chowdhuri, born in Kolkata in 1913, was India's first woman physicist and the first Indian woman to excel in high-energy particle physics. She worked at the Bose Institute, earned her Ph.D. on cosmic rays at the University of Manchester under Nobel Laureate Patrick M. S. Blackett, discovered pi-mesons (a subatomic particle), and was nominated for a Nobel Prize in 1950 by Erwin Schrödinger. She became the first woman faculty member at TIFR in 1949, selected personally by Homi J. Bhabha, and continued research on cosmic rays and subatomic particles until her death in 1991.

08

What honour did the International Astronomical Union give to Bibha Chowdhuri?

In 2019, the International Astronomical Union (IAU) honoured her legacy by renaming a star in the constellation Leo—HD 86081—as 'Bibha', meaning 'beam of light', making her literally a star in heaven. In 2020, the Government of India also declared a chair professorship in her name.

09

What is the connection between the story "Feathered Friend" and the historical practice of miners using canaries?

The story draws directly on the real-world practice: miners used to carry canaries down into coal mines to detect the presence of dangerous gases such as carbon monoxide, because canaries are particularly sensitive to such gases. In the story, the narrator remembers this practice at the crucial moment when Claribel collapses, which is what prompts him to suspect the air on the space station is contaminated—ultimately saving the crew.

10

What research institutes did Bibha Chowdhuri work at during her career?

Bibha Chowdhuri's career spanned several institutes: the Bose Institute (where she first made her mark), the University of Manchester (Ph.D. under Patrick M. S. Blackett), the Tata Institute of Fundamental Research (TIFR) in 1949 as its first woman faculty member, the Physical Research Laboratory in Ahmedabad under the mentorship of Vikram Sarabhai, the Kolar Gold Mines (for cosmic-ray research), and the Saha Institute of Nuclear Physics in Kolkata.

11

Is the NCERT Class 8 Poorvi Unit 5 PDF free to download?

Yes. You can read and download the full NCERT Class 8 Poorvi Unit 5 PDF for free on CBSE PrepMaster—no sign-up or login required.

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