JAC • Class 7 • English (Dahlia) • Ch 13

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Science and Technology in Our Lives

“Science and Technology in Our Lives” is a comprehensive, forward-looking expository chapter that explores how scientific inquiry and technological innovations have reshaped human civilization. From agriculture, medicine, and clean energy to telecommunications, high-speed transit, and space exploration, science touches every aspect of our daily existence. The chapter also urges young minds to cultivate a responsible scientific temper, ethical awareness, cyber safety, and ecological harmony.

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From Bullock Carts to Mars Rovers: How Science Powers Human Dreams

Did you know that just a century ago, sending a simple message across continents took weeks by steamship, while deadly epidemics swept through entire cities unchecked? Today, instantaneous satellite communication and life-saving vaccines protect billions. How did science transform our world, and what responsibilities come with this power?

Why This Chapter Matters

Science and technology are the primary engines driving 21st-century progress and national development. Studying this chapter nurtures curiosity, critical reasoning, problem-solving abilities, awareness of India’s space and technological milestones (such as ISRO’s Chandrayaan and digital revolutions), and a balanced perspective on digital well-being and environmental preservation.

Before You Begin (Prerequisites)

Basic understanding of common household gadgets and communication tools
Awareness of fundamental scientific principles and inventions
Grammar concepts: Simple Future and Future Continuous Tenses, and cause-effect connectors

What You Will Learn (Core Objectives)

Trace the transformative impact of science across healthcare, agriculture, transport, and communication
Understand India’s indigenous achievements in space research (ISRO) and digital technology
Debate the ethical dimensions of technology: e-waste, digital distraction, and environmental conservation
Construct sentences using Future Tense forms and logical connectors of cause and effect

Chapter Roadmap & Progression

1 1. Pillars of Technological Transfo...

2 2. India’s Scientific Heritage and...

3 3. The Ethical Balance: Science as...

4 4. Grammar Focus: Future Tenses and...

Complete Concept Guide (100% Curriculum Coverage)

1. Pillars of Technological Transformation in Daily Life

Modern human society operates on scientific foundations that our ancestors could barely conceive:

Agriculture and Food Security: Mechanized tractors, drip irrigation systems, high-yielding variety (HYV) seeds, soil health analysis, and weather forecasting satellites have turned barren fields into abundant granaries, sustaining a global population of over eight billion.
Medicine and Public Health: Discovery of antibiotics, MRI and CT diagnostic scans, laser surgeries, robotic laparoscopy, and miraculous mRNA vaccines have doubled average human life expectancy over the past century, eradicating dreaded plagues like smallpox.
Communication and Information: The evolution from handwritten letters and telegraphs to smartphones, fiber-optic internet, and satellite constellations allows instantaneous knowledge sharing, online schooling, and global collaboration.
Transportation and Space Exploration: High-speed bullet trains, fuel-efficient aircraft, electric vehicles (EVs), and interplanetary missions (like ISRO’s Chandrayaan-3 landing on the Moon’s South Pole and Aditya-L1 studying the Sun) showcase humanity’s ceaseless ambition.

2. India’s Scientific Heritage and Indigenous Milestones

India has a rich tradition of scientific inquiry extending from ancient mathematicians (Aryabhata, Brahmagupta) to modern pioneers:

Pioneering Institution / Scientist	Key Scientific Contribution	National & Global Impact
Sir C. V. Raman	Raman Scattering Effect (Nobel Prize in Physics, 1930)	Fundamental understanding of light-matter interaction; celebrated on National Science Day (28 Feb).
Dr. Homi J. Bhabha	Father of Indian Nuclear Energy Programme	Established atomic energy infrastructure for medical research and energy self-reliance.
Dr. Vikram Sarabhai & ISRO	Indian Space Research Organisation (Aryabhata, PSLV, GSLV)	Cost-effective satellite launches, cyclone early-warning systems, and tele-education.
Dr. A. P. J. Abdul Kalam	Missile development (Agni, Prithvi) and aerospace engineering	Strengthened national defense and inspired millions of students as the “People’s President”.

3. The Ethical Balance: Science as Master or Servant?

Science is a powerful tool; whether it blesses or blights society depends on how humanity wields it. The chapter presents a thoughtful critique:

Bounties of Science

Eradication of fatal epidemics
Instant global connectivity and education
Renewable solar and wind energy
Automated safety and weather warnings

Hazards of Unchecked Technology

E-waste pollution and toxic landfill hazards
Cyberbullying, digital addiction, and sedentary health risks
Carbon emissions causing global climate disruption
Weaponization and threats of destruction

As Albert Einstein warned: “Concern for man and his fate must always form the chief interest of all technical endeavors.”

4. Grammar Focus: Future Tenses and Connectors of Cause and Effect

The text employs temporal projections and logical explanations, highlighting two key grammatical features:

A. Future Tense Formations

Simple Future (will / shall + Base Verb): “Artificial intelligence will revolutionize healthcare.”
Future Continuous (will be + Verb-ing): “Scientists will be exploring deep ocean trenches next year.”

B. Connectors of Cause and Effect

Words like because, therefore, since, consequently, and as a result clarify logical relationships:

“Satellites provide early storm warnings; consequently, thousands of coastal lives are saved.”
“We must recycle electronic gadgets because e-waste poisons groundwater.”

Key Grammatical Rules, Literary Devices & Core Principles

Future Continuous Syntax

Subject + will be / shall be + Present Participle (V-ing) + Object

Expresses an action that will be in ongoing progress at a specific time in the future.

Cause and Effect Linkage

Scientific Research (Cause) → Technological Solution (Effect) → Human Welfare (Goal)

The ethical trajectory of constructive science.

Raman Effect Equation

Scattered Light Frequency ≠ Incident Light Frequency (Inelastic Scattering)

Discovery made by C. V. Raman on 28 February 1928, yielding the 1930 Nobel Prize.

Digital Health Ratio

20-20-20 Rule: Every 20 mins, look 20 feet away for 20 seconds

Prevents digital eye strain during prolonged screen work.

Eco-Technological Rule

Technology + Renewable Resources = Sustainable Development

Balancing technological growth with planetary biosphere preservation.

Conceptual Solved Examples & Case Studies

Example 1

Question 1: How has modern science revolutionized the field of agriculture and food security?

Step-by-Step Solution:

Answer: Modern science has revolutionized agriculture through the introduction of high-yielding variety (HYV) seeds, mechanized farm machinery like harvesters and tractors, drip and sprinkler irrigation techniques, precision soil testing, biological pest controls, and satellite weather alerts. These advancements have enabled farmers to boost crop productivity exponentially, helping feed rapidly growing populations.

Example 2

Question 2: What are two major achievements of the Indian Space Research Organisation (ISRO)?

Step-by-Step Solution:

Answer:\n1. The Chandrayaan missions, especially Chandrayaan-3, which made India the first nation in history to land a robotic spacecraft successfully near the lunar South Pole.\n2. The Mars Orbiter Mission (Mangalyaan), which reached Martian orbit in its very first attempt at an extraordinarily low budget, demonstrating India’s prowess in indigenous space technology.

Example 3

Question 3: Transform the sentence into Future Continuous Tense: “Engineers develop electric transport systems.”

Step-by-Step Solution:

Answer: “Engineers will be developing electric transport systems.”

Example 4

Question 4: Combine the two sentences using a connector of cause and effect: “Digital devices emit blue light. Prolonged use disrupts human sleep cycles.”

Step-by-Step Solution:

Answer: “Digital devices emit blue light; consequently (or: therefore), prolonged use disrupts human sleep cycles.”

Example 5

Question 5: Why is it crucial to treat science as a “servant” rather than a “master”?

Step-by-Step Solution:

Answer: Science is a powerful instrument meant to serve human welfare, health, education, and ecological preservation. If science becomes the “master”, unchecked technological greed leads to devastating consequences such as environmental destruction, nuclear weapons, digital addiction, and loss of empathy. Humanity must guide technology with moral wisdom and social responsibility.

Common Misconceptions & Examiner Traps

Common Misconception

Assuming science and technology mean the exact same thing.

Scientific Reality & Correction

Science is the systematic study of the physical and natural world through observation, while technology is the practical application of scientific knowledge.

Common Misconception

Confusing “because” (gives reason) with “therefore” (gives result).

Scientific Reality & Correction

Use “because” before the cause: A happened because of B. Use “therefore” before the effect: B happened; therefore, A occurred.

Common Misconception

Overlooking the negative environmental impact of discarded electronics.

Scientific Reality & Correction

Electronic waste (e-waste) releases toxic heavy metals like lead and mercury into groundwater if not responsibly recycled.

Visual Learning & Conceptual Map

Chapter Summary & 10 Key Takeaways

Takeaway 1

“Science and Technology in Our Lives” examines how human inventions have transformed modern living.

Takeaway 2

In agriculture, high-yielding seeds, mechanized equipment, and satellite forecasting guarantee food security.

Takeaway 3

Medical breakthroughs—including vaccines, imaging scans, and antibiotics—have doubled human life expectancy.

Takeaway 4

Telecommunications and the internet have turned the planet into an interconnected global village.

Takeaway 5

India has made immense contributions, from Sir C. V. Raman’s Nobel discovery to modern ISRO achievements.

Takeaway 6

Space missions like Chandrayaan-3 and Aditya-L1 demonstrate indigenous engineering and scientific excellence.

Takeaway 7

The chapter emphasizes that technology must be harnessed responsibly to mitigate electronic waste and digital addiction.

Takeaway 8

Ethical vigilance is necessary to ensure scientific power serves peace, equality, and biosphere preservation.

Takeaway 9

Grammatically, students practice Future Tenses (Simple Future and Future Continuous).

Takeaway 10

Cause-and-effect linkers (because, therefore, consequently) express logical scientific deductions.

Check Your Understanding (Diagnostic Practice Questions)

Diagnostic questions testing core conceptual clarity. Answers are hidden initially — solve each problem first, then click to reveal the step-by-step verified solution.

What is the primary difference between science and technology?

Reveal Answer & Explanation

Answer: Science is the systematic pursuit of knowledge, while technology is the practical application of that knowledge.
Science discovers underlying natural laws; technology creates tools and devices using those laws.

Why is 28 February celebrated annually in India as National Science Day?

Reveal Answer & Explanation

Answer: To commemorate Sir C. V. Raman’s discovery of the “Raman Effect” on 28 February 1928.
Sir C. V. Raman received the Nobel Prize in Physics in 1930 for his discovery regarding the scattering of light.

Identify the future tense form in: “Researchers will be developing cleaner solar batteries.”

Reveal Answer & Explanation

Answer: Future Continuous Tense.
“Will be developing” represents an ongoing action in the future.

Name two hazardous consequences of unregulated electronic waste (e-waste).

Reveal Answer & Explanation

Answer: Groundwater poisoning by heavy metals (lead, mercury) and toxic air pollution from open burning.
Improper dumping of discarded electronics leaches dangerous chemicals into soil and water supplies.

Which Indian space agency launched the historic Chandrayaan-3 lunar mission?

Reveal Answer & Explanation

Answer: ISRO (Indian Space Research Organisation).
ISRO achieved a historic milestone by soft-landing the Vikram lander near the Moon’s South Pole in August 2023.

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