পাঠভিত্তিক প্ৰশ্নোত্তৰ আৰু কাৰ্যাৱলী (Textbook Activities & Solutions)

Activity 1: Comprehension Questions (বোধমূলক প্ৰশ্নোত্তৰ)

(a) Question: What was the historic moment mentioned in the passage?
(পাঠটিত উল্লেখ কৰা ঐতিহাসিক মুহূৰ্তটো কি আছিল?)

Answer: The historic moment was the successful soft landing of India’s spacecraft Chandrayaan-3 near the Moon’s South Pole on August 23, 2023, making India the first country in the world to reach this region.
(ঐতিহাসিক মুহূৰ্তটো আছিল ২০২৩ চনৰ ২৩ আগষ্টত ভাৰতৰ মহাকাশযান চন্দ্ৰযান-৩-এ চন্দ্ৰৰ দক্ষিণ মেৰুত সফলভাৱে মৃদু অৱতৰণ কৰা, যাৰ ফলত ভাৰত এই অঞ্চলত উপনীত হোৱা বিশ্বৰ প্ৰথমখন দেশত পৰিগণিত হয়।)

(b) Question: Why did the scientists decide to explore the South Polar region?
(বিজ্ঞানীসকলে চন্দ্ৰৰ দক্ষিণ মেৰু অঞ্চল অন্বেষণ কৰাৰ সিদ্ধান্ত কিয় লৈছিল?)

Answer: Scientists decided to explore the South Polar region because it was largely unexplored by past missions and is believed to hold significant amounts of water ice beneath its surface.
(বিজ্ঞানীসকলে দক্ষিণ মেৰু অঞ্চলটো বাছি লৈছিল কাৰণ ই পূৰ্বৰ অভিযানসমূহত অনাবিষ্কৃত আছিল আৰু ইয়াৰ পৃষ্ঠৰ তলত প্ৰচুৰ পৰিমাণে বৰফৰ পানী মজুত থকাৰ সম্ভাৱনা আছে।)

(c) Question: What could be the uses of water ice?
(বৰফৰ পানী কি কি কামত ব্যৱহাৰ কৰিব পৰা যাব?)

Answer: Water ice found on the Moon could be used for providing drinking water for astronauts, producing life-supporting oxygen, and making hydrogen rocket fuel for future space journeys.
(চন্দ্ৰৰ বৰফৰ পানী মহাকাশচাৰীসকলৰ খোৱাপানী হিচাপে, শ্বাস-প্ৰশ্বাসৰ বাবে অক্সিজেন প্ৰস্তুত কৰিবলৈ আৰু ভৱিষ্যতৰ মহাকাশ অভিযানৰ বাবে ৰকেটৰ ইন্ধন তৈয়াৰ কৰিবলৈ ব্যৱহাৰ কৰিব পৰা যাব।)

(d) Question: Why is the Moon’s South Pole so special?
(চন্দ্ৰৰ দক্ষিণ মেৰুটো কিয় ইমান বিশেষ?)

Answer: The Moon’s South Pole is special because its deep craters are permanently shadowed from sunlight, preserving water ice and cosmic secrets that can reveal mysteries of our early solar system.
(চন্দ্ৰৰ দক্ষিণ মেৰুটো বিশেষ কাৰণ ইয়াৰ গভীৰ গহ্বৰবোৰত সূৰ্যৰ পোহৰ নপৰে, যাৰ ফলত তাত কোটি কোটি বছৰ ধৰি বৰফ আৰু সৌৰজগতৰ সৃষ্টিৰ ৰহস্য সংৰক্ষিত হৈ আছে।)

(e) Question: Do you think humans will build houses on the Moon one day?
(তুমি ভাবানে যে এদিন মানুহে চন্দ্ৰত ঘৰ সাজিব?)

Answer: Yes, with the discovery of water ice, oxygen extraction methods, and rapid technological advancements by space agencies like ISRO and NASA, humans may build research stations and sustainable settlements on the Moon in the future.
(হয়, পানীৰ উপস্থিতি, অক্সিজেন প্ৰস্তুতৰ সম্ভাৱনা আৰু বৈজ্ঞানিক প্ৰযুক্তিৰ দ্ৰুত বিকাশৰ ফলত ভৱিষ্যতে বিজ্ঞানীসকলে চন্দ্ৰত মানৱ গৱেষণা কেন্দ্ৰ আৰু বসতি স্থাপন কৰিব পাৰিব।)

Activity 3: Sanskrit Roots of Space Terms (মহাকাশীয় শব্দৰ মূল)

• Chandrayaan: Chandra (Moon) + Yaan (Craft / Vehicle) = Moon vehicle (চন্দ্ৰলৈ যোৱা যান)

• Vikram: Vikram = Valour / Courage (সাহস / বীৰত্ব — ড° বিক্ৰম সাৰাভাইৰ নামত)

• Pragyan: Pragyan = Wisdom / Intelligence (প্ৰজ্ঞা / জ্ঞান / বুদ্ধি)

• Antariksh: Antariksh = Outer space (মহাকাশ / অন্তৰীক্ষ)

Activity 4: Timeline Sequence of Chandrayaan-3 (ক্ৰমিক পৰ্যায়সমূহ)

1. Step 1: Chandrayaan-3 was planned to land on the South Pole. (দক্ষিণ মেৰুত অৱতৰণৰ পৰিকল্পনা)

2. Step 2: Launch from Satish Dhawan Space Centre, Sriharikota. (শ্ৰীহৰিকোটাৰ পৰা উৎক্ষেপণ)

3. Step 3: Soft landing on the lunar surface on August 23, 2023. (২৩ আগষ্টত মৃদু অৱতৰণ)

4. Step 4: Vikram and Pragyan explored the lunar surface and sent data. (বিক্ৰম আৰু প্ৰজ্ঞানে চন্দ্ৰপৃষ্ঠ অন্বেষণ কৰি তথ্য প্ৰেৰণ)

Activity 5: Quiz on Chandrayaan-3 & Pragyan Rover (কুইজ আৰু উত্তৰ)

1. What is the name of the rover on Chandrayaan-3?
   → (b) Pragyan (প্ৰজ্ঞান)

2. How many wheels does Pragyan have?
   → (c) Six (৬ টা চকা)

3. What does Pragyan do on the Moon?
   → (b) Collects data and analyzes soil (তথ্য সংগ্ৰহ আৰু মাটি পৰীক্ষা)

4. Where did Chandrayaan-3 land on the Moon?
   → (b) South Pole (দক্ষিণ মেৰু)

Activity 6: Grammar — Future Tense: ‘Will’ vs ‘Going to’ (‘Will’ আৰু ‘Going to’ ৰ ব্যৱহাৰ)

• ‘Going to’: Used when there is present evidence/signs or a prior plan already decided.

• ‘Will’: Used for decisions made spontaneously on the spot, predictions, or promises.

Fill in the Blanks (Activity 6.e):

Chandrayaan-3 is going to be a historic mission for India, as it is going to land on the lunar surface. The lander is going to carry the Pragyan Rover. The rover is going to explore the Moon’s South Pole region. This mission will demonstrate India’s potential in space missions and will mark the country as the fourth to achieve a soft landing on the Moon. The Pragyan rover will analyse the lunar soil and will send important data back to Earth. Chandrayaan-3 will be remembered as a major milestone in India’s space journey.

Sentence Correction (Activity 6.f):

1. She is going to open the door because someone knocked.
   → Correction: Someone knocked. She will open the door. (On the spot decision)

2. I think I will help him with his homework.
   → Correct [ ✓ ]

3. Look! He will fall off the ladder!
   → Correction: Look! He is going to fall off the ladder! (Clear visible evidence)

Activity 7: Synonyms and Antonyms (সমৰ্থক আৰু বিপৰীত শব্দ)

Activity 8: Dr. Vikram Sarabhai Comprehension (ড° বিক্ৰম সাৰাভাই সম্পৰ্কীয় প্ৰশ্নোত্তৰ)

(1)

Question: Who is known as the father of India’s space programme?
(ভাৰতীয় মহাকাশ কাৰ্যসূচীৰ জনক বুলি কাক জনা যায়?)

Answer: Dr. Vikram Sarabhai is revered as the Father of India’s Space Programme.
(ড° বিক্ৰম সাৰাভাইক ভাৰতীয় মহাকাশ কাৰ্যসূচীৰ জনক বুলি জনা যায়।)

(2)

Question: Which Indian organization did Dr. Vikram Sarabhai help to establish?
(ড° বিক্ৰম সাৰাভায়ে কোনটো ভাৰতীয় সংস্থা প্ৰতিষ্ঠা কৰাত সহায় কৰিছিল?)

Answer: He helped establish the Indian Space Research Organisation (ISRO) in 1969 and the Physical Research Laboratory (PRL) in 1947.
(তেওঁ ১৯৬৯ চনত ইছৰো (ISRO) আৰু ১৯৪৭ চনত ফিজিকেল ৰিচাৰ্চ লেবৰেটৰী (PRL) প্ৰতিষ্ঠা কৰিছিল।)

(3)

Question: In which field did Dr. Vikram Sarabhai make major contributions?
(ড° বিক্ৰম সাৰাভায়ে কোন ক্ষেত্ৰত প্ৰধান অৱদান আগবঢ়াইছিল?)

Answer: He made monumental contributions in the fields of space science, cosmic ray physics, atomic energy, and higher educational institution building.
(তেওঁ মহাকাশ বিজ্ঞান, পদাৰ্থ বিজ্ঞান, পাৰমাণৱিক শক্তি আৰু উচ্চ শিক্ষাৰ প্ৰতিষ্ঠান গঢ়াৰ ক্ষেত্ৰত অগ্ৰণী অৱদান যোগাইছিল।)

(4)

Question: How would his contributions help students?
(তেওঁৰ অৱদানে ছাত্ৰ-ছাত্ৰীসকলক কিদৰে সহায় কৰিব?)

Answer: His institutions and scientific legacy inspire students to pursue advanced research in science, technology, and space exploration.
(তেওঁৰ বৈজ্ঞানিক আদৰ্শ আৰু প্ৰতিষ্ঠানসমূহে ছাত্ৰ-ছাত্ৰীসকলক বিজ্ঞান আৰু মহাকাশ গৱেষণাত মনোনিৱেশ কৰিবলৈ সদায় অনুপ্ৰাণিত কৰে।)

(5)

Question: Why did Dr. Vikram Sarabhai start the PRL in Ahmedabad?
(ড° বিক্ৰম সাৰাভায়ে আহমেদাবাদত পি আৰ এল (PRL) কিয় আৰম্ভ কৰিছিল?)

Answer: He started PRL to conduct pioneering research in cosmic rays and the upper atmosphere and to use science to serve the nation.
(তেওঁ মহাজাগতিক ৰশ্মি আৰু মহাকাশ পদাৰ্থ বিজ্ঞানৰ উন্নত গৱেষণাৰ জৰিয়তে দেশৰ উন্নয়ন সাধিবলৈ আহমেদাবাদত PRL আৰম্ভ কৰিছিল।)

Activity 9: Cause-Effect Connectors (কাৰণ আৰু ফলাফল সংযোগকাৰী অব্যয়)

• because: introduces a reason (কাৰণ)

• so: introduces a direct result (সেয়েহে)

• since: introduces an understood reason (যিহেতু)

• therefore / hence: introduces a formal conclusion or result (গতিকে / এইবাবেই)

Fill in the Blanks (Activity 9.d & 9.f):

1. Chandrayaan-3 was solar-powered; therefore, it stopped working after sunset.

2. Since the Moon’s South Pole has water ice, scientists want to explore it.

3. The rover sent back photos, so we learned more about the surface.

4. ISRO planned everything well; hence, the mission was a success.

5. The engine failed; therefore, the scientists had to stop the mission.

6. Because / Since it was cloudy, the launch was delayed.

Activity 10: Paragraph on Dr. Vikram Sarabhai (ড° বিক্ৰম সাৰাভাই সম্পৰ্কীয় অনুচ্ছেদ)

I deeply admire Dr. Vikram Sarabhai because he dedicated his entire life to using science and technology for the upliftment of society. He envisioned an independent space programme for India, so he worked tirelessly to establish ISRO in 1969. He strongly believed that education and research are the real keys to national progress; therefore, he founded world-class institutions like PRL and IIM Ahmedabad. His vision made missions like Chandrayaan-3 possible, and his legacy continues to inspire millions of young students across India.

Activity 15: Grammar — Articles: A, An, The (নিৰ্দেশক অব্যয়ৰ ব্যৱহাৰ)

Fill in the Blanks:

1. India sent a rocket to the Moon.

2. The rover moved slowly on the surface.

3. Vikram is the lander of Chandrayaan-3.

4. Riya wants to become an astronaut one day.

5. I saw an interesting space video online.

6. The Moon looked bright in the night sky.

Sentence Correction:

1. She is reading a book about an Moon.
   → Correction: She is reading a book about the Moon.

2. The rover landed on a South Pole of the Moon.
   → Correction: The rover landed on the South Pole of the Moon.

3. We saw a eagle flying above the hills.
   → Correction: We saw an eagle flying above the hills.

4. I want to build the rocket in future.
   → Correction: I want to build a rocket in future.

Activity 23: School Notice for Space Celebration Assembly (বিদ্যালয়ৰ জাননী)

NAME OF SCHOOL: Place
DATE: Date

HEADING: Space Celebration Assembly

All students and teachers of our school are hereby informed that a special morning assembly will be organized on Monday, 4th September 2023, at 9:00 AM in the school auditorium to celebrate India’s historic achievement in the Chandrayaan-3 Moon Landing Mission.

The assembly will feature:

1. An inspiring audio-visual presentation on the Chandrayaan-3 journey.

2. A special speech on Dr. Vikram Sarabhai and ISRO scientists.

3. An exciting inter-house Space Science Quiz competition.

All students are requested to assemble punctually in their school uniforms.

Sd/-
Person
Class Monitor / Head Girl
Place