Science & Tech: Inventions, Impact & Future Trends

What is Science and Technology?

Science is the systematic study of nature and the universe through observation and experiments. Technology is the application of scientific knowledge to create tools, machines, and systems that solve problems.

Example:

• Science: Studying how electricity works (physics).
• Technology: Using that knowledge to build a smartphone.

Why Study This Unit?

This topic helps us understand:

1. How inventions change daily life.
2. The pros and cons of technological progress.
3. How to discuss science/tech topics in writing (e.g., essays, reports).

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Key Subtopics in the Syllabus

1. Major Scientific Inventions and Their Impact

A. The Printing Press (1440, Johannes Gutenberg)

How it works:

• Used movable metal type to print books quickly.
• Reduced the cost of books from 300 days of labor to 1 day.

Impact:

Example in NEB Style: "The printing press revolutionized education by making books affordable. Before 1440, only the rich could afford handwritten books. After Gutenberg, students like you could access textbooks easily!"

B. The Internet (1960s–1990s, ARPANET → World Wide Web)

How it works:

• ARPANET (1969): First network linking computers (U.S. military).
• Tim Berners-Lee (1990): Invented the World Wide Web (URLs, browsers).

Impact:

Grammar Focus: Passive Voice for Tech Descriptions Use passive voice to explain how things are made/discovered:

• Active: Einstein discovered relativity.
• Passive: Relativity was discovered by Einstein in 1905.

Table: Active vs. Passive for Science Topics

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2. Science and Technology in Daily Life

A. Smartphones

Features:

• Camera, GPS, apps (e.g., Google Maps, WhatsApp).
• 5G technology = faster internet.

How They’re Made:

1. Silicon chips (brain of the phone) are designed.
2. Assembled in factories (e.g., Foxconn, China).
3. Tested for bugs before sale.

Example Essay Prompt (NEB Style): "Discuss how smartphones have changed communication. Include both positive and negative effects."

Sample Answer Outline:

1. Introduction: Define smartphones + their rise (2007–today).
2. Positive Effects:
   • Instant messaging (WhatsApp, calls).
   • Access to information (Google, Wikipedia).
3. Negative Effects:
   • Addiction (people ignore family).
   • Health risks (eye strain, radiation myths).
4. Conclusion: Balance pros/cons + future (e.g., AI phones).

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B. Artificial Intelligence (AI)

What is AI?

• Computers that learn and make decisions like humans (e.g., Siri, self-driving cars).

How AI Works:

1. Data Collection: AI reads millions of examples (e.g., photos for facial recognition).
2. Machine Learning: The AI finds patterns (e.g., "cats have pointy ears").
3. Prediction: Uses patterns to make decisions (e.g., "This is a cat").

Example:

• AI in Healthcare: Diagnoses diseases faster than doctors (e.g., detecting cancer in X-rays).

Advantages/Disadvantages:

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3. Ethical Issues in Science and Technology

A. Genetic Engineering (CRISPR)

What is it?

• Editing DNA to change traits (e.g., making crops pest-resistant).

Example:

• Golden Rice: Genetically modified to have vitamin A (fights blindness in poor countries).

Ethical Questions:

1. Is it safe? (Long-term effects unknown.)
2. Who controls it? (Should corporations patent genes?)
3. Playing God? (Editing human babies—e.g., "designer babies".)

NEB-Style Debate Prompt: "Should genetic engineering be banned? Give reasons for your answer."

Sample Argument (For Banning):

• Unpredictable side effects (e.g., new diseases).
• Rich people may exploit it (e.g., only wealthy can afford "perfect" babies).
• Nature should not be "hacked."

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B. Cloning

What is cloning?

• Creating identical copies of organisms (e.g., Dolly the sheep, 1996).

Types of Cloning:

Example in NEB Exam: "Explain cloning with examples. Do you think it should be allowed? Why/why not?"

Sample Answer: Cloning is copying DNA to create identical organisms. Dolly the sheep (1996) was the first cloned mammal. Humans could be cloned for organs (therapeutic) or babies (reproductive). I oppose human cloning because:

1. It’s unnatural and could lead to identity crises.
2. Slippery slope: Who decides who gets cloned?
3. Health risks: Cloned animals often die young.

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4. Future Trends in Science and Technology

A. Space Tourism

What is it?

• Rich people paying to visit space (e.g., Blue Origin, SpaceX).

Example:

• Jeff Bezos (2021): Flew to space in his own rocket (New Shepard).

Pros/Cons:

B. Renewable Energy

Types:

1. Solar: Sunlight → electricity (panels on roofs).
2. Wind: Wind turbines generate power.
3. Hydro: Dams use flowing water.

Example:

• Nepal’s Potential: Hydropower (e.g., West Seti Dam) could power the whole country!

Why It Matters:

• Fights climate change (less pollution than coal).
• Cheaper long-term (sun/wind are free!).

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Grammar Focus: Describing Science/Tech (Passive Voice)

The NEB exam tests your ability to describe processes using passive voice. Here’s how:

Rule 1: Passive = [Object] + was/were + past participle

Rule 2: By + Agent (who did the action)

• Active: Elon Musk invented Tesla.
• Passive: Tesla was invented by Elon Musk.

Rule 3: No Agent? Use "by" + general noun

• Active: Someone hacked the system.
• Passive: The system was hacked.

Practice Exercise: Turn these active sentences into passive:

1. Einstein developed the theory of relativity. → The theory of relativity was developed by Einstein.
2. Companies are testing self-driving cars. → Self-driving cars are being tested by companies.

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Writing Task: Report on a Scientific Invention

The NEB exam may ask you to write a report on a science/tech topic. Follow this structure:

Sample Report: The Invention of the Telephone (1876)

Title: The Telephone: Revolutionizing Communication Introduction: The telephone, invented by Alexander Graham Bell in 1876, changed how people communicate forever. Before telephones, messages were sent by letter or telegraph (which was slow and expensive).

How It Works:

1. Microphone: Converts sound into electrical signals.
2. Transmission: Signals travel through wires.
3. Receiver: Converts signals back into sound.

Impact:

Conclusion: The telephone was a game-changer for society. Today, we have smartphones, but the basic idea remains the same: connecting people instantly.

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NEB-Style Report Question: "Write a report on the invention of the internet. Include its inventor, how it works, and its effects on society."

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Exam Tips for Unit 7

1. Memorize Key Inventions:

   • Printing press (Gutenberg), telephone (Bell), internet (Berners-Lee), AI (Turing).
   • NEB loves timelines—practice drawing one!

2. Passive Voice is Key:

   • 50% of marks in descriptions go to correct passive structures.
   • Example: "The computer was invented in the 1940s by scientists."

3. Balance Pros/Cons:

   • NEB questions ask for both sides (e.g., "Discuss the impact of smartphones").
   • Use tables (like above) to organize your answer.

4. Real-Life Examples:

   • Relate to Nepal where possible (e.g., hydropower, mobile banking).
   • Example: "In Nepal, solar panels help rural areas get electricity."

5. Practice Essay Structures:

   • Introduction: Define the topic.
   • Body: 2–3 paragraphs (pros/cons or history/impact).
   • Conclusion: Summarize + future prediction.

6. Avoid Plagiarism:

   • NEB checks for originality. Paraphrase textbook ideas in your own words.

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NEB Board-Style Questions (Practice!)

1. Short Answer (5 marks): "What is genetic engineering? Give one example and one ethical concern."

   Sample Answer: Genetic engineering is editing DNA to change an organism’s traits. Example: Golden Rice (vitamin A). Ethical concern: Playing God—should humans edit life?

2. Essay (10 marks): "Science and technology have improved our lives. Do you agree? Give reasons."

   Sample Answer Outline:

   • Agree:
     1. Medicine: Vaccines save lives (e.g., polio eradication).
     2. Communication: Internet connects the world.
   • Disagree:
     1. Pollution: Factories harm the environment.
     2. Unemployment: Robots replace jobs.
   • Conclusion: Balance is needed—tech should help, not harm.

3. Report (7 marks): "Write a report on the invention of the computer. Include its inventor and uses."

   Sample Start: The computer was invented in the 1940s by Charles Babbage (theoretical) and ENIAC team (practical). Today, computers are used in schools, hospitals, and businesses...

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Final Checklist Before Exam

✅ Know 5 major inventions and their inventors. ✅ Practice passive voice for 10 minutes daily. ✅ Write one essay per week on science/tech topics. ✅ Learn how to structure reports (title, intro, body, conclusion). ✅ Relate examples to Nepal (e.g., hydropower, mobile apps).

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Remember: Science and technology are tools—they can help or harm depending on how we use them. The NEB wants you to think critically about these topics! 🚀