Unit 5: Science And Curiosity

Hello, my dear students! Welcome to today's English lesson. I am so happy to be here with you to explore this wonderful chapter called "Science and Curiosity" from your NCERT textbook. This is Unit 5, Class 8 English, and I must tell you, it is a really exciting chapter that combines science fiction, poetry, and the inspiring story of a pioneering Indian woman scientist. So let's begin our journey together.

First, let me give you a brief overview of what we will be learning today. This chapter has four main sections. The first is a story titled "Science and Curiosity" written by the famous science fiction writer Arthur C. Clarke. The second is a beautiful poem called "Magnifying Glass" by Walter de la Mare. The third is a passage about "Feathered Friend" which will help us understand the story better. And finally, we have an inspiring biography of Bibha Chowdhuri, India's first woman physicist, who truly lit the path for women in science in our country.

Now, let us start with the very first section called "Feathered Friend". This is actually a pre-reading activity that will help us think about the theme of the story before we read it.

So students, let me ask you a few questions. First, who can a 'feathered' friend be? Well, a feathered friend simply means a bird. It could be a parrot, a sparrow, a pigeon, or even a canary. Any bird that we might keep as a pet or befriend can be called our feathered friend. Now, which 'feathered' friend do you like and why? Perhaps some of you like parrots because they can talk, or maybe you like sparrows because they visit your homes every morning. Think about why you like them.

Now here is an interesting question. If you have a choice between a 'feathered' and a 'furry' friend, who would you choose and why? A furry friend would be a cat, a dog, or a rabbit. Some of you might prefer dogs because they are loyal and playful, while others might prefer birds because they are beautiful and sing. This is a matter of personal choice, and there is no right or wrong answer.

And here is a question that really makes us think. Do you think a 'feathered' or a 'furry' friend can accompany astronauts to space? If yes, why? If no, why not? This is a very interesting question to think about. In the story we are going to read, there is actually a bird in space, so keep this question in mind as we read.

Now, let us move to the next activity called "Poorvi". This is a vocabulary exercise where we need to complete words by inserting vowels. Let me help you with each word one by one.

The first word is "official rule that controls how something is done". The answer is REGULATION. R-E-G-U-L-A-T-I-O-N. This word means a rule or law that controls how something is done.

The second word is "to not allow something". The answer is FORBID. F-O-R-B-I-D. This means to not allow something, to prohibit it.

The third word is "join or blend to form a single entity". The answer is FUSE. F-U-S-E. When we fuse things, we join them together to make one.

The fourth word is "suddenly". The answer is ABRUPTLY. A-B-R-U-P-T-L-Y. This means all of a sudden, without warning.

The fifth word is "admit one's mistake". The answer is CONFESS. C-O-N-F-E-S-S. When you confess, you admit that you have done something wrong.

The sixth word is "a person who advises what to eat to keep healthy". The answer is DIETITIAN. D-I-E-T-I-T-I-A-N. A dietitian is a qualified person who advises people about what to eat to stay healthy.

Great! Now we have completed our vocabulary work. Let us now read the main story "Science and Curiosity" by Arthur C. Clarke.

Now students, this is a science fiction story set in a space station. The narrator is telling us about an incident that happened when they were working in space. Let me explain the story to you step by step.

The story begins by telling us that there was no rule forbidding anyone to keep pets in a space station. No one ever thought it was necessary to have such a rule. But there was a man named Sven Olsen who decided to bring a pet anyway, even if there had been a rule against it.

Now, who was Sven? He was described as a wiry little fellow, which means he was thin but strong. Most of the early spacers were like that because there was a weight limit. They had to weigh less than 150 pounds to get the job, and many of them had to be on a reducing diet to stay within the limit. If they had been heavier, they would have had very slim chances of getting a job in space.

Sven was one of the best construction men on the space station. His job was very tricky and specialized. He had to collect assorted girders as they floated around in free fall. Girders are long, thick pieces of steel or concrete that support large structures. In space, there is no gravity, so everything floats. Sven had to make these girders do what the author calls a "slow-motion, three-dimensional ballet" to get them into the right positions. Then he had to fuse the pieces together when they were precisely dovetailed into the intended pattern. Precisely means exactly, and dovetailed means fitted together perfectly like pieces of a puzzle. This was a skilled and difficult job because a space suit is not the most convenient clothing to work in. Can you imagine working in a big, bulky space suit while trying to handle heavy metal beams that are floating around you?

But Sven's team had one great advantage over construction workers building skyscrapers on Earth. They could step back and admire their handiwork without being abruptly parted from it by gravity. On Earth, when you step back from something you are building, gravity pulls it down. But in space, things float, so you can float away from your work without losing it!

Now, why did Sven want a pet? The narrator says, "Don't ask me why Sven wanted a pet, or why he chose the one he did. I'm not a psychologist, but I must admit that his selection was very sensible." Why was it sensible? Because Claribel weighed practically nothing, her food requirements were tiny, and she was not worried, as most animals would have been, by the absence of gravity. So the pet he chose was very practical for life in space.

Now, what was Claribel? She was a canary, a small yellow bird that people love to keep as pets. Canaries are found in open areas with small trees and shrubs, and they are known for their beautiful singing.

The narrator first became aware that Claribel was aboard when he was sitting in his little office, checking through lists of technical stores. He heard a musical whistle beside his ear and assumed it had come over the station intercom. But instead of an announcement, there was a long pattern of melody that made him look up so suddenly that he forgot about the angle beam just behind his head. When the stars stopped exploding before his eyes - meaning when he recovered from the bump - he had his first view of Claribel.

She was a small yellow canary, hanging in the air as motionless as a hummingbird, but with much less effort because her wings were quietly folded along her sides. They stared at each other for a minute. Then, before the narrator had quite recovered his wits - his ability to think quickly - she did a curious kind of backward loop that no earthbound canary could ever manage, and departed with a few leisurely flicks. It was quite obvious that she had already learned how to operate in the absence of gravity and did not believe in doing unnecessary work. You see, in space, birds don't need to flap their wings to fly. They can just float around!

Sven didn't confess to owning her for several days, but by that time it no longer mattered because Claribel had become a general pet. He had smuggled her up on the last ferry from Earth when he came back from leave. He claimed he brought her partly out of sheer scientific curiosity. He wanted to see just how a bird would operate when it had no weight but could still use its wings.

Claribel thrived and grew fat. The crew had little trouble concealing her when VIPs from Earth came visiting. A space station has more hiding places than you can count. The only problem was that Claribel got rather noisy when she was upset, and they sometimes had to explain the curious peeps and whistles that came from ventilating shafts and storage bulkheads. Ventilating shafts are passageways that allow fresh air in, and bulkheads are dividing walls between separate compartments. There were a couple of narrow escapes, but who would dream of looking for a canary in a space station?

Now, let us move to the second part of the story. The crew was on twelve-hour watches. Although there is no day and night in space when you are floating in permanent sunlight, it was convenient to stick to the terms. One morning, the narrator woke up with a nagging headache - a persistently painful headache - and vague memories of fitful, disturbed dreams. It took him a long time to undo his bunk straps, and he was still half awake when he joined the rest of the duty crew in the mess. Breakfast was unusually quiet, and there was one seat vacant.

"Where's Sven?" he asked, not very much caring.

"He's looking for Claribel," someone answered. "Says he can't find her anywhere. She usually wakes him up."

Before the narrator could retort - respond - that she usually woke him up too, Sven came in through the doorway, and they could see at once that something was wrong. He slowly opened his hand, and there lay a tiny bundle of yellow feathers, with two clenched claws sticking pathetically up into the air. Clenched means pressed together tightly.

"What happened?" they asked, all equally distressed.

"I don't know," said Sven mournfully. "I just found her like this."

"Let's have a look at her," said Jock Duncan, their cook-doctor-dietitian. They all waited in hushed silence - quiet silence - while he held Claribel against his ear in an attempt to detect any heartbeat. Presently he shook his head. "I can't hear anything, but that doesn't prove she's dead. I've never listened to a canary's heart," he added rather apologetically.

"Give her a shot of oxygen," suggested somebody, pointing to the green-banded emergency cylinder in its recess beside the door. Everyone agreed that this was an excellent idea, and Claribel was tucked snugly - cosily - into a face mask that was large enough to serve as a complete oxygen tent for her.

To their delighted surprise, she revived at once. Beaming broadly, Sven removed the mask, and she hopped onto his finger. She gave her series of "Come to the cookhouse, boys" trills - then promptly keeled over again. Keeled means collapsed or fainted.

"I don't get it," lamented Sven. "What's wrong with her? She's never done this before."

For the last few minutes, something had been tugging at the narrator's memory. His mind seemed to be very sluggish that morning - inactive - as if he was still unable to cast off the burden of sleep. He felt that he could do with some of that oxygen - but before he could reach the mask, understanding exploded in his brain. He whirled on the duty engineer and said urgently: "Jim! There's something wrong with the air! That's why Claribel's passed out. I've just remembered that miners used to carry canaries down to warn them of gas."

Now students, this is a very important part of the story. The narrator remembers that miners used to carry canaries down into coal mines because canaries are extremely sensitive to dangerous gases like carbon monoxide. If the canary died or fainted, it was a warning sign that there was gas in the mine, and the miners needed to get out quickly. This is where the phrase "a canary in the coal mine" comes from - it means an early warning sign of potential danger.

"Nonsense!" said Jim. "The alarms would have gone off. We've got duplicate circuits, operating independently."

"Er—the second alarm circuit isn't connected up yet," his assistant reminded him. That shook Jim - startled him - and he left without a word, while they stood arguing and passing the oxygen bottle around like a pipe of peace.

He came back ten minutes later with a sheepish expression - an embarrassed expression. It was one of those accidents that couldn't possibly happen. They had one of their rare eclipses by Earth's shadow that night. Part of the air purifier had frozen up, and the single alarm in the circuit had failed to go off. Half a million dollars' worth of chemical and electronic engineering had let them down completely. Without Claribel, they should soon have been slightly dead - meaning they would have died.

So now, if you visit any space station, don't be surprised if you hear an inexplicable - unexplainable - snatch of birdsong. There's no need to be alarmed; on the contrary, in fact. It will mean that you're being doubly safeguarded - protected - at practically no extra expense.

This is the end of the story by Arthur C. Clarke. Now let us answer the discussion questions.

The first question is: Why did the narrator think Sven had sneaked a bird aboard? What was Sven's scientific reason?

The narrator thought Sven had sneaked a bird aboard because he wanted to see how a bird would operate when it had no weight but could still use its wings. This was out of sheer scientific curiosity - Sven wanted to conduct a kind of informal experiment to observe animal behavior in space.

The second question is: How did Claribel adjust to the new surroundings?

Claribel adjusted very well to the new surroundings. She learned how to operate in the absence of gravity and did not believe in doing unnecessary work. She hung in the air motionless as a hummingbird, with her wings folded quietly along her sides. She could do curious backward loops and depart with leisurely flicks. She thrived and grew fat in the space station.

The third question is: What made the narrator mistake the musical whistle for a sound from the intercom?

The narrator mistook the musical whistle for a sound from the intercom because when he heard the musical whistle beside his ear, he assumed it had come over the station intercom and waited for an announcement to follow. He didn't expect a bird to be making such sounds.

The fourth question is: Do you think the presence of the canary would lead the spacers into trouble? If yes, why? If no, why not?

Yes, the presence of the canary did lead the spacers into trouble because they had to conceal her from VIPs visiting from Earth. There were a couple of narrow escapes when Claribel got noisy and they had to explain the curious peeps and whistles coming from ventilating shafts and storage bulkheads. However, ultimately, the canary also saved their lives by warning them about the air purifier failure, so the trouble was worth it.

Now let us look at the true or false questions.

Statement 1: The alarm at the space station failed to work properly because they were not connected.

This is TRUE. The second alarm circuit wasn't connected up yet, which is why it failed to go off when the air purifier froze up.

Statement 2: Claribel was brought to the space station for an official experiment on animal behaviour in space.

This is FALSE. Claribel was brought to the space station partly out of sheer scientific curiosity by Sven, but it was not an official experiment. He smuggled her up on the last ferry from Earth.

Statement 3: The canary's suffering helped the crew discover a problem with the air purifier.

This is TRUE. When Claribel fainted, the narrator remembered that miners used canaries to detect gas, and this led them to discover that there was something wrong with the air.

Statement 4: The air purifier froze because there was a rare eclipse.

This is TRUE. The story says they had one of their rare eclipses by Earth's shadow that night, and part of the air purifier had frozen up.

Statement 5: Claribel could fly gracefully in the space station, performing loops in the air.

This is TRUE. The story says she did a curious kind of backward loop that no earthbound canary had ever managed.

Statement 6: The space station crew was uninterested in Claribel and hardly noticed her presence after she was discovered.

This is FALSE. After she was discovered, Claribel became a general pet, and the whole crew was fond of her. They were all distressed when she fainted and helped revive her.

Statement 7: Claribel had fainted and had to be revived with oxygen supply.

This is TRUE. Claribel keeled over - fainted - and they had to give her a shot of oxygen to revive her.

Now, let us move to the "Let us think and reflect" section. We have extracts from the story and questions based on them.

The first extract is about Sven's job. Let me read it again: "Sven was one of our best construction men, and excelled at the tricky and specialised work of collecting assorted girders as they floated around in free fall, making them do the slow-motion, three-dimensional ballet that would get them into their right positions, and fusing the pieces together when they were precisely dovetailed into the intended pattern: it was a skilled and difficult job, for a space suit is not the most convenient of garbs in which to work."

Now, question (i): What can be inferred about Sven's abilities from his job description?

The correct answer is B: He possesses a strong understanding of working in space. The description shows that he was very skilled at handling construction work in zero gravity, which requires special skills and understanding.

Question (ii): How can we conclude that Sven was working in zero gravity?

We can conclude this because the story mentions "free fall" and describes how girders floated around. In zero gravity, objects float freely, and workers have to make them perform "slow-motion, three-dimensional ballet" to position them correctly.

Question (iii): This is about Assertion and Reason. Let me select the correct option.

The assertion is that Sven's job required him to make girders perform a 'three-dimensional ballet' in space. The reason is that working in zero gravity allows objects to float, making precise positioning more challenging.

Both (A) and (R) are true, and (R) is the correct explanation of (A). So the answer is A.

Question (iv): Replace the underlined word with a word similar in meaning from the extract.

The sentence is: "During the festival, people wore colourful outfits that represented their culture."

The word in the extract that is similar in meaning is "garbs". So we can replace "outfits" with "garbs".

Now, the second extract is about the conversation between the narrator and Jim about the air. Let me read it again.

Now question (i): Fill in the blank by selecting the correct option.

The narrator references canaries and miners in order to highlight the historical use of canaries as warning systems. This is the correct answer.

Question (ii): Complete the following sentence with a suitable reason.

Jim initially dismisses the warning about the air because he believes the alarms would have gone off since they have duplicate circuits operating independently.

Question (iii): What does the phrase 'shook Jim' mean in the context?

The phrase "shook Jim" means he was startled by unexpected information. The correct answer is B.

Question (iv): What does the crew's action of passing the oxygen bottle around 'like a pipe of peace' suggest about their response to the situation?

This phrase suggests that the crew was working together cooperatively and calmly to deal with the emergency. Passing something like a "pipe of peace" suggests a sense of unity and shared purpose in dealing with the crisis.

Now, let us answer the remaining discussion questions.

Question 1: What was the purpose of the alarm? What had caused its failure?

The purpose of the alarm was to warn the crew if there was something wrong with the air or the air purifier. The alarm failed because the second alarm circuit wasn't connected up yet. Additionally, there was a rare eclipse by Earth's shadow that night, which caused part of the air purifier to freeze up.

Question 2: How does the crew's reaction to Claribel change over the course of the story?

At first, when the narrator first sees Claribel, he is surprised and shocked. Then, after Sven confesses, Claribel becomes a general pet and the whole crew is fond of her. When she faints, they are all distressed and work together to revive her. After she saves them by warning them about the air problem, they come to appreciate her even more, and now space stations keep canaries as a double safeguard.

Question 3: What does the last part of the story tell us about the significance of unusual ways of problem solving?

The last part tells us that sometimes unusual or unexpected solutions can be very effective. A canary, which seems like an unusual pet for a space station, ended up saving the lives of the entire crew. This shows that we should be open to different approaches and not dismiss unconventional ideas.

Question 4: Justify the appropriateness of the title of the story.

The title "Science and Curiosity" is very appropriate for this story. The story is about science - space travel, air purifiers, zero gravity - but it is also about curiosity. Sven brought Claribel out of scientific curiosity to see how a bird would operate in space. The narrator's curiosity about the intercom sound led him to discover Claribel. And most importantly, it was the narrator's memory of how miners used canaries - a piece of scientific knowledge - that saved the crew. Curiosity drives scientific discovery, and this story shows that perfectly.

Question 5: 'Without Claribel, we should soon have been slightly dead.' What does this line suggest about uncertainty of life in space?

This line suggests that life in space is very uncertain and dangerous. Even with advanced technology and multiple safety systems, things can go wrong. The crew was saved only because of the canary's sensitivity to bad air. Without Claribel, they would have died from the faulty air purifier. This shows how fragile human life can be in the harsh environment of space.

Question 6: Explain how has the writer presented science fiction with a touch of humour.

Arthur C. Clarke presents science fiction with humour in several ways. The description of the space station construction work as a "slow-motion, three-dimensional ballet" is humorous. The way Claribel learned to operate in zero gravity and "did not believe in doing unnecessary work" is funny. The phrase "slightly dead" is a humorous way of saying they would have died. Even the ending, where he suggests you might hear birdsong in a space station and not be alarmed because it means you're being "doubly safeguarded," has a light, humorous tone.

Question 7: How would Sven reflect on his experience of almost losing Claribel and for saving the lives of the entire crew?

Sven would probably feel a mix of emotions. He would feel guilty for almost losing Claribel, his beloved pet. But he would also feel relieved and grateful that Claribel's fainting led to the discovery of the air purifier problem, which saved everyone. He might also feel proud that his scientific curiosity - bringing a canary to space - ended up being so beneficial. Overall, he would probably think that it was one of the best decisions he ever made, even if it was driven by curiosity rather than any practical plan.

Now students, let us move to the language learning section called "Let us learn".

The first exercise is about adjectives. We need to match adjectives from the box with words in the passage. Let me go through each one.

The box has: nagging, vague, delighted, narrow, sluggish, hushed, inexplicable, sheepish

1. "nagging headache" - a persistently painful headache 2. "vague memories" - unclear memories 3. "delighted surprise" - pleasant surprise 4. "narrow escapes" - close calls 5. "sluggish mind" - inactive mind 6. "hushed silence" - quiet silence 7. "inexplicable snatch" - unexplainable snatch 8. "sheepish expression" - embarrassed expression

Now, the second exercise is about merged words, also called portmanteau words. Let me explain and complete this.

The example given is "brunch" which is made from "breakfast" and "lunch". It means a meal eaten between breakfast and lunch hours.

Now we need to combine words from Column 1 with Column 2:

1. motor + hotel = motel (a motor hotel, a place for travelers to stay) 2. smoke + fog = smog (a mixture of smoke and fog) 3. situation + comedy = sitcom (a television comedy series) 4. video + log = vlog (a video blog) 5. spoon + fork = spork (a combination of spoon and fork) 6. web + seminar = webinar (a seminar conducted over the web)

Now, the third exercise is about future time references. Let me explain this clearly.

The sentence is: "It will mean that you're being doubly safeguarded."

In this sentence, 'will' denotes future time. This is because it talks about something that will happen in the future - if you visit a space station in the future, you might hear birdsong.

Now, we have a table showing different ways to talk about the future in English:

1. 'will' - used for future events, offers, promises 2. Simple Present Tense - used for schedules or planned actions 3. Present Progressive Tense - used for personal arrangements and fixed plans 4. 'going to' - used in informal speech for future intentions 5. Future Perfect - used when something will be finished by a certain time 6. Future Progressive - used when something will be in progress at a particular time 7. Future in the Past - used when talking about something that was in the future at a certain past time

Now, let me fill in the blanks for the exercise:

1. Our flight leaves at 10.00 a.m. tomorrow. (Simple Present - it's a schedule) 2. They will finish the project by the end of this week. (Future Perfect) 3. The weather forecast says it is going to rain later today. (going to - based on present evidence) 4. We are going to move into our new house next month. (going to - intention) 5. I am going to start my new hobby class next Monday. (going to - plan) 6. She is going to go to the mall this afternoon. (going to - intention) 7. The team is going to have a meeting at 3.00 p.m. tomorrow. (going to - arrangement) 8. I will help you with your homework after dinner. (will - offer)

Now, for the next exercise about filling blanks with suitable forms of verbs:

1. By 2040, artificial intelligence will revolutionise medical treatments. (will + base form) 2. Researchers will have developed AI-powered diagnostic tools that will transform healthcare by the end of this decade. (will have + past participle for future perfect) 3. Next week, the International Science Congress opens to showcase advancements in AI and robotics. (Simple Present - scheduled event) 4. In the coming years, robots will assist surgeons in performing complex operations. (will + base form) 5. Years ago, experts had predicted that AI would reshape our world, and now, as we approach the future, this will be our new reality. (would - future in the past)

Now students, we have completed the story section. Let us now move to the listening and speaking activities.

First, let us look at the listening activity about Monika and Toby. This is a conversation between Monika and Toby, who is a Martian stranded on Earth. Let me give you the transcript and the answers.

The statements are:

1. Toby misses his school. - FALSE (He misses his people and home, not school) 2. Monika accepts Toby as her friend. - TRUE (She says she's happy to have him as her friend) 3. Monika asks Toby about one of his facial features. - TRUE (She asks about his one eye) 4. Toby tells Monika that she had a banana for breakfast. - FALSE (He says she had an apple) 5. Toby shares that he can see much clearer with a closed eye. - TRUE (He says he can see even with his eye closed)

Now, let me fill in the blanks with the exact words:

1. Toby: I miss my people and home. 2. Toby: Well, we Martians don't need to eat anything. We get our energy from the Sun. 3. Monika: Oh! Don't you ever feel like having ice-creams and chocolates! 4. Monika: Okay, tell me one thing. How are you able to see only with one eye? 5. Toby: I can see beyond mountains and clouds, woods and even metals.

Now, the speaking activity about silent letters. Let me help you identify the silent letters:

In "ballet" (ba-lay), the first 'a' is pronounced like in 'bat', so actually there are no silent letters here in the Indian pronunciation.

In "whistle" (wi-sl), the 'h' is silent.

In "alarm" (uh-laam), there are no silent letters in this pronunciation.

In "psychologist" (sai-ko-luh-juhst), the 'p' at the beginning is silent.

Now, for the other words: - receipt - the 'p' is silent - debris - the 's' is silent - pneumonia - the 'p' is silent - almond - the 'l' is silent - foreign - the 'f' is silent - island - the 's' is silent - wreck - there is no silent letter here - aisle - the 's' is silent - campaign - there is no silent letter here - fasten - there is no silent letter here

Now, there is another speaking activity about asking for and giving suggestions. Let me give you some examples:

If you need to make a model of the solar system for the Science Exhibition but don't know what materials to use, you could ask: "What should I do to make a model of the solar system?" or "How can I make a good model?" or "What are the best materials to use for a solar system model?"

Your friend could give advice like: "I feel you should use cardboard and paint" or "You should ensure you have all the planets in the correct order" or "It's good to prepare yourself by researching about the planets first."

For preparing for the inter-class quiz on Chandrayaan-3, you could ask: "How can I prepare for the quiz?" or "What should I study for the Chandrayaan-3 topic?"

Your friend could say: "You should read about the mission objectives" or "It's best to use flashcards for important dates and facts" or "Try to understand the technology used in the mission."

Now, let us move to the writing activity. This is about writing an article titled "The Importance of Internet". You need to use the social media web given in the book and write an article with three paragraphs.

In the first paragraph, you give a general introduction to the topic. You could say something like: "The internet has become an essential part of our daily lives. It has transformed the way we communicate, learn, and work."

In the second paragraph, you explain the uses and importance with examples. You could talk about how the internet helps us in education, communication, entertainment, business, and accessing information.

In the third paragraph, you end with a thoughtful idea or quote. You could say something like: "The internet is a powerful tool that, when used wisely, can open doors to endless possibilities."

Now students, let us move to the "Let us explore" section. This has some interesting information.

First, it talks about "a canary in the coal mine" - a phrase that describes early signs of potential danger. It mentions that coal miners in places like Arunachal Pradesh used canary birds to detect the presence of carbon monoxide. These little birds are particularly sensitive to such gases and can prevent mining accidents.

Then there is information about how astronauts manage routine tasks in the absence of gravity. They use special space pens, resistance exercise equipment, preserved foods, and special sleeping arrangements.

There is also information about how animals can save humans from natural calamities. Animals can sense natural calamities like tsunamis and earthquakes. For example, before the 2004 tsunami in Indonesia, elephants ran for higher ground, flamingos abandoned low-lying areas, and dogs refused to go outdoors. This is because animals can sense ultra-low frequency electromagnetic waves that are generated before earthquakes.

There is also information about Salim Ali, the "Birdman of India", who was an Indian ornithologist and conducted systematic bird surveys across India.

Now, let us move to the poem "Magnifying Glass" by Walter de la Mare.

This is a beautiful poem about the magic of seeing the world through a magnifying glass. Let me read the poem to you:

With this round glass I can make Magic talk— A myriad shells show In a scrap of chalk; Of but an inch of moss A forest—flowers and trees; A drop of water Like hive of bees.

I lie in wait and watch How the deft spider jets The woven web-silk From his spinnerets;

The tigerish claws he has! And oh! the silly flies The stumble into his net— With all those eyes!

Not even the tiniest thing But this my glass Will make more marvellous And itself surpass.

Yes, and with lenses like it, Eyeing the moon, 'Twould seem you'd walk there In an afternoon!

Now, let me explain this poem. The poet is describing how a magnifying glass reveals the hidden wonders of small things. With a magnifying glass, a scrap of chalk shows a myriad of shells - countless tiny patterns. An inch of moss becomes a whole forest with flowers and trees. A drop of water looks like a hive of bees with all its activity.

The poet then watches a spider spinning its web. The spider is described as "deft" - skillful - and it jets out woven web-silk from its spinnerets. The spider has "tigerish claws" - sharp claws like a tiger. And the silly flies stumble into his net with all their eyes.

The poet says that with a magnifying glass, not even the tiniest thing is ordinary. Everything becomes more marvelous and surpasses itself - becomes more than it was.

The poem ends with the idea that with lenses like a magnifying glass, you could even seem to walk on the moon in an afternoon. This is a poetic way of saying that magnification can help us see faraway things too.

Now, let us answer the discussion questions about the poem.

First, we need to complete the summary:

The poem describes the magic of seeing the world through a magnifying glass. It reveals how tiny things like shells and moss can appear vast and complex. Even a drop of water can seem like a hive of bees. The poet is impressed at how the spider spins its web-silk from its spinnerets. The poem ends with the idea that, through lenses, the moon could seem within reach.

Now, the fill-in-the-blank questions:

1. The main idea of the poem is the transformative power of close observation through the magnifying glass.

2. The tone of the poem is wonder and curiosity.

3. The poem has four stanzas with four lines in each stanza. Hence, it is a quatrain.

4. The rhyme scheme of the poem is ABCB. (Let me check: talk/chalk - A, trees/bees - B, wait/watch - A, spinnerets/nets - B, has/eyes - A, surpass/afternoon - B. So yes, ABCB)

Now, we need to pick examples from the poem for poetic devices:

1. Simile: "A drop of water / Like hive of bees" - comparing a drop of water to a hive of bees 2. Alliteration: "deft spider" - the 'd' sound, "silly flies" - the 's' sound 3. Metaphor: "Magic talk" - describing the magnifying glass as if it has magical powers of speech

Now, for the visual imagery questions:

1. In the line, 'A myriad shells show in a scrap of chalk', the magnifying glass reveals intricate patterns and structures in ordinary chalk.

2. In the line, 'A forest—flowers and trees' the poet uses the imagery of nature to emphasise how magnification can transform small things into vast landscapes.

Now, for the questions about why the poet uses certain techniques:

1. The poet uses exclamation marks in lines like 'The tigerish claws he has!', 'With all those eyes!' and 'In an afternoon!' because it expresses excitement and wonder.

2. In the phrase, 'Magic talk' the poet uses personification to describe the magnifying glass because it gives the inanimate object human qualities of being able to talk or communicate.

3. Each stanza follows a repetitive pattern of introducing a small or ordinary object and then describing the extraordinary details revealed through magnification. This is because it supports the theme of curiosity as the speaker reveals the hidden wonders.

4. In the final stanza the poet shifts from small, everyday objects being magnified to a celestial body like moon because it shows that magnification can help us not only see small things but also bring distant things closer, making the impossible seem possible.

Now, let us answer the "Let us think and reflect" questions about the poem.

First extract: "With this round glass / I can make Magic talk— / A myriad shells show / In a scrap of chalk; / Of but an inch of moss / A forest—flowers and trees;"

(i) Is the statement "The poet uses his magical powers to make the round glass powerful" true or false?

This is FALSE. The poet is not using magical powers; he is using a magnifying glass, which is a scientific tool that magnifies things.

(ii) Which line expresses the presence of intricate patterns in ordinary objects?

"A myriad shells show in a scrap of chalk" - this line shows that in a simple piece of chalk, there are countless shell-like patterns.

(iii) What does the comparison of 'an inch of moss' to a 'forest' suggest about the speaker's view of the world through the magnifying glass?

It suggests that the speaker sees the world as full of hidden wonders. Even something as small as an inch of moss can reveal a whole world of complexity when viewed through a magnifying glass.

(iv) How does the poet feel about the ability of the magnifying glass to reveal hidden wonders?

The correct answer is B: Fascinated. The poet is clearly amazed and fascinated by what the magnifying glass reveals.

Now, the second set of questions:

1. What is the significance of the spider in the poem?

The spider is significant because it shows how magnification reveals the skill and complexity of even the smallest creatures. The spider's web-spinning is presented as a remarkable feat, and the spider is described as having "tigerish claws" - emphasizing its predatory nature.

2. How might the speaker's view of the natural world change if there was no use of a magnifying glass?

Without a magnifying glass, the speaker would see the world as ordinary and mundane. Small things like a drop of water, a piece of chalk, or a spider would seem simple and uninteresting. The magnifying glass transforms these ordinary things into sources of wonder.

3. Why does the poem end with the idea of the moon being within reach?

The poem ends with this idea to show that magnification is not just about making small things bigger, but also about making distant things seem closer. It suggests that with the right tools, we can explore and understand things that seem far beyond our reach.

4. What is the speaker's attitude towards nature and the act of observation?

The speaker has a sense of wonder and curiosity towards nature. He believes that observation is a magical act that reveals the hidden beauty and complexity of the natural world.

5. Which is your favourite part of the poem? Why?

This is for you to think about and answer based on your personal response to the poem.

Now, let us move to the language exercises about the poem.

First, fill in the blanks with words from the box: woven, myriad, deft, stumble, surpass, marvellous

The sentence is: "With his deft description, the author has written the story beautifully woven with fascinating details. When you read the story, you will surely enjoy the myriad storytelling technique that attracts all kinds of readers. What makes the story interesting is the superb way of describing the marvellous emotions and feelings of the characters. The reader will stumble upon the unexpected twists and turns that surpass all our understanding and make us wonder at the narrative power of the author."

Now, the collective noun exercise:

1. a swarm of locusts 2. a constellation of stars 3. a grove of trees 4. a troupe of dancers 5. a battalion of soldiers 6. a fleet of ships

Now, the idiomatic expressions with 'eye':

1. apple of one's eye - a person who is very precious or important 2. in the blink of an eye - something that happens very quickly 3. keep an eye on something or somebody - watch something or someone closely 4. turn a blind eye - act as if you do not see or notice 5. see eye to eye - agree with each other 6. bird's-eye view - an overall look at something

Now, the suffix '-ish' exercise. Which nouns can we add '-ish' to make adjectives?

We can add '-ish' to: girl, boy, moon (girlish, boyish, moonish). We cannot add it to glass, book, silk, water, or scrap because they don't form common adjectives.

Now, there is a listening activity about Indian inventions. Let me give you the answers:

The true statements are: 1. The father is surprised by the fact that India was involved in the invention of radio broadcasting and fibre optics. - TRUE 5. The daughter expresses pride and admiration for India's role in global inventions. - TRUE 6. The daughter is excited as she shares new discoveries about India's contributions with her father. - TRUE

Now, there is a speaking activity about pronouncing /v/ and /f/. Remember, when we pronounce words with /v/ sound, there is a vibration in our vocal cords, whereas /f/ sound has no vibration. Both sounds can occur at the beginning, middle, or end of words.

Examples with /f/: - beginning: forest, flowers, from - middle: deft, afternoon - end: of, itself

Examples with /v/: - beginning: vase, valour, victory - middle: woven, even, marvellous - end: hive

Now, there is another speaking activity: If you could travel to space, which planet would you like to visit and why? What would you like to take along? You should speak about five things you would like to take.

And another one: If you could invent something, what would you like to invent and how? Give reasons for your choice.

Now, there is a writing activity about creating a conversation between Deepa and Asma about a Science Fair project. You need to write an engaging dialogue that includes where, when, and with whom the conversation is taking place, the tone (formal or informal), key information, and words to express emotions or actions.

Now, there is information about visual aids for people with low vision, telescopes in India and around the world, ancient Indian scholars like Aryabhata, Varahamihira, and Bhaskaraacharya II, and the Jantar Mantar observatories.

Now students, we come to the last section of this chapter - the biography of Bibha Chowdhuri, titled "The Beam of Light that Lit the Path for Women in Indian Science".

This is an inspiring story about India's first woman physicist. Let me explain this to you in detail.

The passage begins by talking about how women's potential in science, technology, engineering, and mathematics (STEM) is being recognized in today's world. India has seen trailblazers who paved the way. Today, women behind ISRO's Mars Orbiter Mission and Chandrayaan-3 are celebrated for their achievements. But the foundation was laid by early pioneers like Bibha Chowdhuri - India's first woman physicist - who carved a path in the male-dominated field of physics.

Bibha Chowdhuri was born in 1913 in Kolkata. At a time when Indian women struggled to seek equitable access to education - equal access - Bibha emerged as a rare beam of light - a woman who defied the odds and lit a path for others to follow. She was a scientist who rose not only against the societal expectations of women but also amidst the towering giants of science - men whose names the world would come to celebrate, while hers was whispered only in the halls of those who recognised her brilliance.

Bibha's persistence eventually earned her a place at the Bose Institute. She had already begun to chip away at the walls of exclusion, becoming the first Indian woman to excel in high-energy particle physics.

In 1945, Bibha's academic journey took her to the University of Manchester. Under the guidance of the celebrated Nobel Laureate Patrick M.S. Blackett, she delved deeper into the field of cosmic rays. Her Ph.D. thesis on cosmic rays earned local recognition, with newspapers introducing her as 'India's New Woman Scientist—She has an eye for Cosmic Rays'. This title reflected the awe she inspired in a world still skeptical of her capabilities - doubtful of her abilities.

In an era marked by towering scientific discoveries, Bibha was often on the cusp of greatness but remained in the shadows of her male counterparts. Her most notable - remarkable - contribution was the discovery of pi-mesons, a subatomic particle. Her nomination for a Nobel Prize in 1950 by Erwin Schrödinger, though unsuccessful, reflected her remarkable talent. Her life, full of challenges and struggles, was marked by an uphill battle to be heard and seen in the field of science. Chowdhuri never received any awards during her lifetime, but continued her work tirelessly.

In 1949, upon her return to India, she became the first woman faculty member at the Tata Institute of Fundamental Research (TIFR), personally selected by Homi J. Bhabha. Chowdhuri's contributions spanned across research institutes like the Physical Research Laboratory in Ahmedabad and the Saha Institute of Nuclear Physics in Kolkata. This is where she continued her work on cosmic rays and subatomic particles. Through decades of crucial research, from Kolar Gold Mines to the Physical Research Laboratory under the mentorship of Vikram Sarabhai, Bibha's work went on quietly, as she remained in the periphery - boundary - of Indian scientific acclaim - praise.

She passed away in 1991, her story untold, her name largely forgotten.

But the stars are not meant to remain hidden forever. 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'. Fittingly, she is now a 'star in heaven', a symbol of the light she brought to Indian science. A fitting tribute to a woman whose life was a radiant example of tenacity - determination to continue what you are doing - brilliance, and quiet determination. In 2020, the Government of India declared a chair professorship in her name.

Fast forward to the present day, and the advancements made by women in Indian science reflect Chowdhuri's pioneering spirit and the progress she helped ignite - arouse. Women in ISRO, for instance, are no longer participants but leaders in missions that make global headlines.

One such luminary is Dr. Ritu Karidhal Srivastava, popularly referred to as the 'Rocket Woman of India.' Her pivotal role in ISRO's Mars Orbiter Mission and subsequent leadership in Chandrayaan-2 and Chandrayaan-3 reflect the leaps women have made in STEM in India. Over 50 women contributed to Chandrayaan-3, and their success is built upon the shoulders of pioneers like Bibha Chowdhuri. Their roles in developing autonomous - independent - systems for spacecraft and managing independent mission-critical operations highlight the capabilities of women in pushing India's space programme forward.

The journey from Bibha Chowdhuri's era to today's women scientists has been long and arduous - difficult, needing a lot of effort - but it is also inspiring. The struggles Chowdhuri faced are a stark - clear - reminder of how far we've come—and how much further we have to go. But with every cosmic achievement—be it landing on the moon or reaching Mars—these women prove that the journey is well worth it.

Bibha Chowdhuri's legacy lives on. Her story continues to inspire young women to pursue their passions, break barriers, and leave their mark on the world. Whether exploring cosmic rays or sending rockets to Mars, India's women scientists are writing the next chapter in a story that Bibha Chowdhuri helped begin.

As the stars of Indian science shine brighter, Bibha Chowdhuri, the beacon - a good example that gives people hope and encouragement - 'beam of light,' will always guide the way.

Now, let us answer the discussion questions about Bibha Chowdhuri.

First, arrange the events in correct order:

1. Bibha Chowdhuri was born in pre-independent India. (1913) 2. She joined the University of Manchester under the guidance of the celebrated Nobel Laureate, Patrick M.S. Blackett. (1945) 3. She was nominated for a Nobel Prize by Erwin Schrödinger. (1950) 4. She became the first woman faculty member at the Tata Institute of Fundamental Research (TIFR). (1949) 5. The Government of India declared a chair professorship in Bibha's name. (2020) 6. The International Astronomical Union (IAU) honoured her legacy by renaming a star in the constellation Leo—HD 86081—as 'Bibha'. (2019)

Now, let us answer the "Let us think and reflect" questions.

First extract: "In 1945, Bibha's academic journey took her to the University of Manchester. Under the guidance of the celebrated Nobel Laureate, Patrick M.S. Blackett, she delved deeper into the field of cosmic rays. Her Ph.D. thesis on cosmic rays earned local recognition, with newspapers introducing her as 'India's New Woman Scientist—She has an eye for Cosmic Rays'."

(i) Why is the mention of Patrick M.S. Blackett, a Nobel Laureate, significant in this extract?

The mention is significant because it shows that Bibha Chowdhuri was working under the guidance of a world-renowned scientist, which highlights her capability and the respect she commanded even as a student.

(ii) What can be inferred about the public perception of women scientists in the 1940s from the title given to her by the press 'India's New Woman Scientist'?

The correct answer is B: The world was still doubtful about the capabilities of women scientists. The fact that she was introduced as "India's New Woman Scientist" suggests that women scientists were still a novelty and not commonly accepted.

(iii) In the phrase 'celebrated Nobel Laureate,' the word 'celebrated' refers to all of the following EXCEPT someone who is frequently seen in public. So the answer is B.

(iv) Complete the following sentence suitably.

The phrase 'She has an eye for Cosmic Rays' suggests that she had a natural talent or aptitude for studying cosmic rays.

Now, the second extract: "The journey from Bibha Chowdhuri's era to today's women scientists has been long and arduous, but it is also inspiring..."

(i) What can be inferred about the challenges faced by women scientists today, as compared to Bibha Chowdhuri's era?

The correct answer is B: The challenges remain, but progress has been made. The passage shows that while women have made significant progress, there is still more work to be done.

(ii) The phrase 'Bibha Chowdhuri's legacy lives on' suggests that her contributions and inspiration continue to influence and inspire people today.

(iii) Why is Bibha Chowdhuri referred to as a 'beacon' and a 'beam of light' in the extract?

She is referred to as a beacon and a beam of light because she was a pioneering figure who showed the way for other women in science. Her work and achievements illuminated the path for future generations of women scientists.

(iv) "Bibha Chowdhuri was the beacon, the 'beam of light' whose story continues to inspire young women." This is an OPINION because it involves judgment and interpretation, not a verifiable fact.

Now, let me answer the remaining questions:

1. Why is Bibha Chowdhuri considered a pioneer in the field of science?

Bibha Chowdhuri is considered a pioneer because she was India's first woman physicist. She broke many barriers at a time when women had very limited opportunities in science. She was the first Indian woman to excel in high-energy particle physics, the first woman faculty member at TIFR, and made significant contributions to the study of cosmic rays and subatomic particles.

2. What does Bibha Chowdhuri's nomination by Erwin Schrödinger tell us about her abilities?

Her nomination for a Nobel Prize by Erwin Schrödinger, one of the most famous physicists in the world, tells us that her work was recognized at the highest international level. It shows that she was doing remarkable research that was worthy of the world's most prestigious scientific award.

3. Bibha Chowdhuri never worked for awards or recognition. Support this statement with evidence from the text.

The text says: "Chowdhuri never received any awards during her lifetime, but continued her work tirelessly." This shows that she was dedicated to her work and science for its own sake, not for recognition or awards.

4. How does the renaming of a star as 'Bibha' serve as both a literal and symbolic recognition of her contributions to science?

Literally, a star has been named after her - HD 86081 in the constellation Leo is now called 'Bibha'. Symbolically, it represents the light she brought to science, just as a star shines in the sky. It is a fitting tribute to someone who was described as a "beam of light."

5. How do the roles of women in ISRO today reflect broader changes in societal attitudes towards women in STEM in India?

Women in ISRO are no longer just participants but leaders in major missions. Over 50 women contributed to Chandrayaan-3, and women like Dr. Ritu Karidhal Srivastava are leading crucial missions. This shows that society has progressed and now recognizes women's capabilities in STEM fields, though there is still more progress to be made.

6. What is the writer's purpose of highlighting the contributions of Bibha Chowdhuri and other modern women scientists?

The writer's purpose is to inspire young women to pursue careers in science and to show that progress has been made thanks to pioneers like Bibha Chowdhuri. It also aims to recognize the often-overlooked contributions of early women scientists.

7. How might this text help shape people's perception of the role of women in other traditionally male-dominated fields?

This text shows that women can excel in any field, even those traditionally dominated by men. It challenges stereotypes and inspires both men and women to recognize and support women's contributions in all fields.

Now, let us move to the language exercises about this passage.

First, the crossword puzzle about antonyms. Let me try to solve it:

Across: 4. core (opposite might be periphery or exterior) 5. dependent (opposite is independent) 7. extinguish (opposite is ignite or spark) 8. terrestrial (opposite is celestial or extraterrestrial)

Down: 1. effortless (opposite is arduous) 2. weakness (opposite is strength) 3. neglect (opposite is care or attention) 6. trivial (opposite is significant or important)

Now, the substitution exercise:

1. They are considered to be the first people to start the online markets. - pioneers 2. A scientist who studies matter, energy, light, etc. - physicist 3. Most of my friends are my classmates and are my age. - peers 4. We first welcomed all the famous and important people in folk song for the award ceremony. - luminaries 5. My brother finally succeeded in his business because of his continuous efforts and determination. - persistence 6. We should remove all the things that block our way in achieving success. - barriers

Now, making words with suffixes:

1. member + ship = membership 2. govern + ment = government 3. partner + ship = partnership 4. child + hood = childhood 5. citizen + ship = citizenship 6. entertain + ment = entertainment 7. brother + hood = brotherhood 8. agree + ment = agreement

Now, the acronym exercise. We need to find NASA, AIIMS, AYUSH, NIPER, WHO in the grid.

NASA - National Aeronautics and Space Administration AIIMS - All India Institute of Medical Sciences AYUSH - Ayurveda, Yoga and Naturopathy, Unani, Siddha, and Homoeopathy NIPER - National Institute of Pharmaceutical Education and Research WHO - World Health Organization

Now, the exercise about passive voice. Let me complete the news report:

Last year, significant advancements in medical science were published in leading medical journals when a new vaccine for malaria was discovered. The vaccine was tested through several clinical trials and results were published in those journals. During the trials, blood samples were taken regularly from participants to monitor their immune response. The amount of antibodies produced was measured carefully to assess the effectiveness of the vaccine.

Now, the exercise about rewriting a report in passive voice:

An experiment was conducted to investigate the effects of light on plant growth. Various plants were placed under different light conditions and their growth was measured over several weeks. Data was recorded daily to track the height of each plant. At the end of the experiment, the results were analysed and it was found that plants exposed to natural light grew significantly taller than those under artificial light. It was concluded that sunlight plays a crucial role in plant development. The findings were presented to the class, highlighting the importance of light in enhancing photosynthesis and overall plant health.

Now, the Chandrayaan exercise:

1. The spacecraft was launched towards the Moon from the Earth. (C - was launched) 2. It was positioned to enter the Moon's orbit. (B - was positioned) 3. The spacecraft's path was adjusted for landing. (B - was adjusted) 4. The spacecraft was slowed down as it nears the Moon's surface. (B - was slowed down) 5. The rover was released to explore the surface and collect valuable data. (D - was released)

Now, there is a listening activity about Artificial Intelligence. Let me give you the answers:

1. What is one of the key benefits of AI in the healthcare sector? The answer is (ii) Provides personalised treatments and faster diagnoses.

2. How did AI play a crucial role during the global pandemic? The answer is (ii) AI assisted in speeding up the discovery of new medicines.

3. What example was given regarding AI's role in renewable energy? The answer is (iii) AI is improving the performance of wind turbines and solar panels.

4. What does AI offer to teachers in the field of education? The answer is (iii) Helps teachers analyse student performance.

5. What is one of the user-friendly features that AI is enhancing for people with disabilities? The answer is (ii) Improves speech recognition and voice command technologies.

Now, there is a speaking activity about a panel discussion on "Evaluating the Impact of Mobile Phones—Beneficial or Harmful". Each student takes on a different role - moderator, principal, teacher, parent, and student - and presents their views.

Now, there is a writing activity about writing a report on a Zonal Science Exhibition. You need to write in past tense, passive voice, and third person, with a headline, reporter's name, and three paragraphs.

Now, there is information about Augmented Reality and Virtual Reality in education, the Rashtriya Vigyan Puraskar awards, and women pioneers from different fields.

Students, we have now covered the entire chapter thoroughly. Let me give you a complete summary of everything we have learned today.

SUMMARY:

In this chapter "Science and Curiosity", we have learned several important things:

1. The story "Science and Curiosity" by Arthur C. Clarke teaches us about the importance of curiosity in science. The story shows how a canary named Claribel was taken to space by Sven Olsen out of scientific curiosity, and how this seemingly impractical decision ended up saving the lives of the entire crew when the canary's sensitivity to bad air warned them of a malfunctioning air purifier. The story also teaches us that sometimes the most unexpected solutions can be the most effective.

2. The poem "Magnifying Glass" by Walter de la Mare teaches us about the wonder of close observation. The poet shows how a magnifying glass can reveal hidden wonders in ordinary things - how a scrap of chalk can show myriad shells, how an inch of moss can become a forest, and how a drop of water can look like a hive of bees. The poem encourages us to look at the world with curiosity and wonder.

3. The biography of Bibha Chowdhuri teaches us about perseverance and pioneering spirit. She was India's first woman physicist who broke many barriers and made significant contributions to the study of cosmic rays. Despite facing many challenges in a male-dominated field, she continued her work tirelessly without seeking recognition. Her legacy lives on through the star named after her and the many women scientists she has inspired.

4. We also learned about various language concepts including: - Vocabulary words like regulation, forbid, fuse, abruptly, confess, dietitian - Adjectives and their usage - Merged words (portmanteau words) - Future time references (will, going to, simple present, present progressive, future perfect, future progressive, future in the past) - Passive voice - Collective nouns - Idiomatic expressions with 'eye' - Suffixes (-ish, -ship, -ment, -hood) - Acronyms - Silent letters in English

5. We learned about the importance of canaries in detecting danger, how astronauts live and work in space, how animals can sense natural calamities, and about famous Indian scientists like Salim Ali, Aryabhata, and others.

6. We learned about the listening activities involving conversations with a Martian, about Indian inventions, and about Artificial Intelligence.

7. We learned about speaking activities including pronunciation of /v/ and /f/ sounds, asking for and giving advice, and participating in panel discussions.

8. We learned about writing activities including articles, conversations, and reports.

This chapter has truly shown us how science and curiosity go hand in hand, and how curiosity can lead to amazing discoveries and achievements. Whether it's a canary in space, a magnifying glass revealing hidden wonders, or a pioneering woman scientist lighting the way for others, curiosity drives us to explore, discover, and learn.

Thank you for listening to this lesson. I hope you have learned something new and interesting today. Keep being curious about the world around you, and who knows - you might make your own amazing discoveries someday!

Goodbye, students! Keep learning and exploring!