Std 9 History & Political Science · Chapter 7

7. Science and Technology

Complete solutions to the Exercise. Maharashtra State Board (Balbharati), Grade Nine History and Political Science.

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Exercise

1 AChoose the correct option from the given options and complete the statements.

(1) ........... was named as the first Chairman of atomic energy commission.

  • ✓ (a) Dr Homi Bhabha[cite: 7]
  • (b) Dr Homi Sethna
  • (c) Dr A.P.J. Abdul Kalam
  • (d) Dr Raja Ramanna

Answer: Dr Homi Bhabha was named as the first Chairman of atomic energy commission.

(2) ........... was the first completely indigenous communication satellite made by ISRO.

  • (a) Aryabhatt
  • (b) Insat 1 B
  • (c) Rohini-75
  • ✓ (d) Apple[cite: 7]

Answer: Apple was the first completely indigenous communication satellite made by ISRO.

1 BIdentify and write the wrong pair.
MissileType / Associated Function
(1) Prithvisurface to surface ballistic missile
(2) Agnisurface to underwater ballistic missile
(3) Akashfrom surface to air attacking missile
(4) Naganti-tank missile

Answer: The wrong pair is Agni — surface to underwater ballistic missile.

Correction: The Agni missile is a surface-to-surface military missile designed to ensure secure borders. [cite: 7]

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2 AComplete the activity as per the given instruction. Prepare a timeline of the progress of India in science and technology.
PeriodMajor Events in Science & Technology
1961 to 1970 [cite: 7]1961: India's first successful Rocket launch from Thumba.
1969: Indian Space Research Organisation (ISRO) was established. [cite: 7]
1971 to 1980 [cite: 7]1974: First nuclear test at Pokharan.
1975: Launch of the first Indian satellite, Aryabhatta. [cite: 7]
1981 to 1990 [cite: 7]1981: APPLE launched successfully.
1983: INSAT 1-B launched.
1984: Computerised reservation for rail travel started in Delhi. [cite: 7]
1991 to 2000 [cite: 7]1994: Mobile phone service started in India.
1998: Second nuclear test at Pokharan. Konkan Railway started.
2000: Restructuring of the Department of Telecommunications. [cite: 7]
2 BWrite short notes on—

(1) Space research

India’s space research began with the Indian National Committee for Space Research launching the first research rocket from Thumba, Kerala, in 1961. The indigenously built Rohini-75 rocket followed in 1967. After the successful launch of the first satellite, Aryabhatta, with Soviet help in 1975, the Indian Space Research Organisation (ISRO) took charge of further space research, having been established in 1969. Subsequent milestones included the launch of the remote-sensing satellite Bhaskar-1 in 1979, the first completely indigenously built telecommunications satellite APPLE in 1981, and the transformative INSAT 1-B in 1983, which revolutionized telecommunication, television broadcasting, and weather forecasting in India. [cite: 7]

(2) Telex service

The Department of Telecommunications started the telex service in 1963 to transmit typed messages from one part of the country to another rapidly. In 1969, the telex service was introduced in the Devanagari script in Delhi, eventually spreading across the entire country and becoming widely used across various fields. However, with the rapid rise and widespread adoption of the internet after 1990, the significance and usage of the telex service significantly declined. [cite: 7]

(3) Pokhran nuclear test

India conducted its first nuclear test at Pokharan in Rajasthan on 18th May 1974. This decision, taken by Prime Minister Indira Gandhi, was in consonance with India's policy of using nuclear energy for peaceful purposes and achieving self-sufficiency, largely driven by security concerns over China's nuclear capabilities and Pakistan's efforts to acquire nuclear weapons. Dr Homi Sethna and Dr Raja Ramanna played major roles in this successful explosion. Later, on 11th May 1998, India carried out its second series of nuclear tests at Pokharan, including testing a Hydrogen Bomb, to conclusively prove its nuclear preparedness to the world. [cite: 7]

(4) Bhaskar 1 satellite

India launched the remote sensing experimental satellite Bhaskar-1 from Soviet Russia in 1979. Its primary objective was to observe various features on the earth's surface using remote sensing technology. The data and photographs obtained from this satellite were immensely useful for India's development, providing critical information regarding underground water bodies, mineral deposits, and weather forecasting. It was also vital for studying the environment, mapping forests, and conducting research in the field of oceanography. [cite: 7]

3Explain the following statements with reasons.

(1) Pandit Nehru established the Atomic Energy Commission.

India's first Prime Minister, Pandit Jawaharlal Nehru, possessed a strong desire to nurture a scientific temper within the country to bring about the nation's rapid progress. With this perspective, he established the Indian Atomic Energy Commission on 10th August 1948. The core objectives behind setting up this commission were to harness and produce electricity from atomic energy, increase the yield of food grains while making them last longer, establish the necessary domestic technology for achieving these goals, and to develop nanotechnology. [cite: 7]

(2) India decided to conduct nuclear tests.

India decided to conduct nuclear tests to ensure self-sufficiency and to utilize nuclear energy for peaceful purposes. Furthermore, geopolitical tensions played a major role; India needed to respond to China's growing nuclear capabilities and Pakistan's desperate efforts to acquire nuclear weapons with China's assistance. Consequently, to secure its borders and prove its nuclear preparedness, India carried out its first successful nuclear test at Pokharan in 1974, followed by a second test in 1998. [cite: 7]

(3) USA imposed economic sanctions on India.

On 11th May 1998, India carried out its second series of nuclear tests at Pokharan to prove its nuclear preparedness, which included testing a Hydrogen Bomb. Although Prime Minister Atal Bihari Vajpayee assured the international community that there would be no first use of nuclear weapons by India, the United States of America opposed these nuclear explosions. Consequently, as a direct punitive measure against the tests, the USA imposed strict economic sanctions on India immediately. [cite: 7]

4Answer the following questions in detail.

(1) Which of the everyday services are influenced by the satellite technology?

Satellite technology heavily influences numerous everyday services that we rely upon. Following the launch of satellites like INSAT, major revolutions occurred in telecommunications, allowing for nationwide telephone connectivity, television broadcasting, and radio network expansion (connecting hundreds of Akashwani stations). Satellite technology is fundamental for accurate weather forecasting, allowing authorities to track cyclones and storms. It also plays a vital role in search and rescue operations during disasters like shipwrecks or airplane crashes. Furthermore, it enables telemedicine services, connecting rural Primary Health Centers with superspecialty urban hospitals, and greatly aids educational institutions through remote learning broadcasts. [cite: 7]

(2) Why is Dr. A.P.J. Abdul Kalam called as the 'Missile Man'?

Dr A.P.J. Abdul Kalam is revered as the 'Missile Man' of India due to his phenomenal contribution to the country's indigenous missile production. He spearheaded the Integrated Guided Missile Development Programme (IGMDP) executed by the Defence Research and Development Organisation (DRDO). Under his visionary leadership, India successfully developed and tested a formidable array of advanced missiles, including the surface-to-surface ballistic missile Prithvi, the Agni missile series, the surface-to-air Akash missile, and the anti-tank Nag missile. His foundational work transformed India into a self-reliant nation capable of protecting its borders, earning him the title of the father of India's missile programme. [cite: 7]

(3) How one can do computerised reservation for rail travel?

In order to bring efficiency, accuracy, and coordination to the ticketing process, the Indian Railways adopted modern technology and started the computerised reservation system for the first time in Delhi in 1984. Through this system, passengers could book confirmed seats from a centralised network instead of relying on manual paper ledgers. Today, computerised reservation can be done by visiting designated railway reservation counters equipped with terminals, or highly conveniently through internet-based online booking portals and mobile applications managed by the railway authorities, allowing instant access to seat availability and secure electronic payments. [cite: 7]

(4) Write the key features of Konkan Railway.

The Konkan Railway, which started operations in 1998, is a marvel of modern Indian engineering stretching over a distance of 760 kilometres across four states: Maharashtra, Goa, Karnataka, and Kerala. Its key features involve navigating extremely challenging terrain, which required the construction of 92 tunnels, with the 6.5 km tunnel at Karbude being the longest. The track encompasses 179 big and 1819 small bridges, including the 2065.8m long bridge on the River Sharavati (the biggest) and the 64m tall bridge on the River Panval (India's tallest). Additionally, to ensure safety on tracks prone to landslides in the hilly regions, special sensors are fitted directly to the railway engines to avoid accidents. [cite: 7]

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