Question 1

I You will listen to a conversation between Anita and Toby. Toby is a Martian and is stranded on Earth. He has become Anita's friend. As you listen, choose the true statements from 1–5.

Accepted Answer

1. True - Toby says he misses his planet and people.
2. False - Martians don’t need to eat; they get energy from the Sun.
3. True - Toby has one big eye and can see clearly.
4. True - Martians get energy from the Sun.
5. True - Toby says he can see the apple going round in Anita's stomach. — From the conversation:
- Toby expresses missing his planet and people.
- He says Martians don’t eat but get energy from the Sun.
- He has one eye and can see beyond objects.
- He mentions seeing the apple in Anita's stomach.
Thus, statements 1, 3, 4, and 5 are true; statement 2 is false.

Question 2

II Listen to the conversation again and fill in the blanks with the exact words you hear.

Accepted Answer

Students are expected to listen carefully to the conversation and fill in the blanks with the exact words spoken by Anita and Toby. Since the exact blanks are not provided in the text, the answer depends on the audio transcript. — This exercise tests listening skills and attention to detail. Students must listen to the conversation and write the exact words in the blanks provided in their textbook or worksheet.

Question 3

You will listen to a conversation between a girl and her father about the art of paper folding called origami. As you listen, select the true statements from 1–7.

Accepted Answer

1. True - Sai is trying to make an origami crane.
2. False - Origami started in Japan.
3. True - Paper was expensive and used for special occasions.
4. True - People began making designs for fun in the seventeenth century.
5. True - The crane symbolizes peace and long life.
6. True - Folding a thousand cranes is believed to grant a wish.
7. False - Origami is about the process, patience, and creativity, not just the final shape. — From the conversation:
- Sai is making a crane.
- Origami originated in Japan.
- Paper was costly and used for ceremonies.
- Fun designs started in the seventeenth century.
- Crane is culturally significant.
- A thousand cranes can grant wishes.
- The art values the process, not just the shape.

Question 4

You will listen to a girl speak about the story of how Agartala got its name and the importance of agar. As you listen, choose the correct option for the questions given below.

Accepted Answer

Agartala means 'under the agar tree'. This is correct as the name comes from 'agar' (a tree) and 'tala' (underneath).
B) Incorrect - Agarwood is rare and expensive.
C) Incorrect - Agarwood forms only when the tree is hurt or infected.
D) Incorrect - Agarwood is used in perfumes, incense, and carvings. — The passage explains:
- The name Agartala means 'under the agar tree'.
- Agarwood is rare and costly.
- It forms as a defense when the tree is infected.
- It is used in perfumes and rituals.
Therefore, option A is correct; others are false.

Question 5

Who were the Wright brothers and what is their major contribution to human history?

Accepted Answer

Pioneers of the first successful airplane flight — The Wright brothers, Orville and Wilbur Wright, are credited with inventing and flying the first successful powered airplane, marking a major milestone in human history.

Question 6

What was the toy given to the Wright brothers by their father that inspired their interest in flying?

Accepted Answer

A small paper helicopter powered by a rubber band — The Wright brothers were fascinated by a toy helicopter made of paper, bamboo, and cork, powered by a rubber band, which sparked their imagination about flight.

Question 7

Which of the following best describes the Wright brothers' educational background related to aerodynamics?

Accepted Answer

They were bicycle mechanics with practical skills but no formal aerodynamics education — The Wright brothers did not have formal education in aerodynamics; they were skilled bicycle mechanics who applied practical knowledge and experimentation.

Question 8

What scientific approach did the Wright brothers use to develop their airplane?

Accepted Answer

Systematic experimentation and building wind tunnels to test wing shapes — The Wright brothers used a scientific approach involving systematic experimentation, including building wind tunnels to test different wing shapes and control mechanisms.

Question 9

What is 'wing warping' and why was it important in the Wright brothers' airplane?

Accepted Answer

A system to control the plane's balance and direction by twisting the wings — Wing warping was an innovative control system invented by the Wright brothers that allowed the pilot to twist the wings to maintain balance and steer the airplane.

Question 10

When and where did the Wright brothers make their first successful powered flight?

Accepted Answer

December 17, 1903 / Kitty Hawk, North Carolina — The Wright brothers made their first successful powered flight on December 17, 1903, at Kitty Hawk, North Carolina. This flight lasted 12 seconds and covered 120 feet.

Question 11

How long did the Wright brothers' first flight last and what distance did it cover?

Accepted Answer

12 seconds and 120 feet — The first powered flight by Orville Wright lasted 12 seconds and covered a distance of 120 feet, marking the first controlled, powered heavier-than-air flight.

Question 12

Why was controlling the aircraft considered as important as generating lift and thrust by the Wright brothers?

Accepted Answer

Controlling the aircraft was important because previous attempts at flight failed due to lack of control. The Wright brothers realized that without a way to steer and balance the plane, it could not fly safely or effectively. Their invention of wing warping allowed them to control the plane's direction and stability, which was crucial for successful powered flight. — This answer explains that control was essential to prevent crashes and maintain stable flight, highlighting the Wright brothers' insight into the problem of controlled flight.

Question 13

Describe the role of perseverance and experimentation in the Wright brothers' journey to invent the airplane.

Accepted Answer

Perseverance and experimentation played a vital role in the Wright brothers' success. They faced many setbacks such as crashes and engine problems but never gave up. They conducted systematic experiments, built wind tunnels, and tested different wing shapes. Each failure taught them valuable lessons that helped improve their designs. Their persistence and scientific approach ultimately led to the first successful powered flight. — The answer covers the importance of persistence despite failures and the scientific method of trial and error used by the Wright brothers.

Question 14

What challenges did the Wright brothers face in designing their airplane engine?

Accepted Answer

The Wright brothers faced the challenge of designing a lightweight engine because suitable engines were not available at the time. They had to build their own 12-horsepower engine that was powerful enough to lift the plane but light enough not to weigh it down. This required mechanical skill and innovation, as engine design was a major technical obstacle in achieving powered flight. — The answer explains the technical difficulty of creating an engine that balanced power and weight, a key challenge in early aviation.

Question 15

Explain how the Wright brothers' background as bicycle mechanics helped them in their invention of the airplane.

Accepted Answer

Being bicycle mechanics gave the Wright brothers practical skills in mechanics, engineering, and problem-solving. They understood the importance of balance and control from bicycle riding, which helped them design control systems like wing warping. Their hands-on experience enabled them to build and repair parts, design lightweight structures, and experiment effectively, which was crucial since they lacked formal aerodynamics education. — The answer links their mechanical skills to their ability to innovate and solve problems in airplane design.

Dreams and Discoveries

Dreams and Discoveries — Study Notes

MY BROTHER'S GREAT INVENTION

I

II

Practice Questions — Dreams and Discoveries

All 5 Chapters in Poorvi