What is financial infrastructure?

The network of banks, payment systems and stock markets that helps manage money

What are the main things a bank does?

Holds deposits and lends money as loans

How do banks make money?

They pay lower interest on deposits and charge higher interest on loans

Earning interest on previous interest as well as on the original amount

How does the chapter describe science — as facts or as a process?

Science is described as a process: a way of thinking that welcomes curiosity, asks questions, and is open to the unknown, not merely a textbook of facts.

What do the butterfly and paper plane on the page numbers symbolise?

They symbolise how learning takes flight when curiosity leads the way, just as a butterfly flutters freely and a paper plane soars into the sky.

How did something as simple as a paper plane connect to real science?

The dream of flying began with simple observations and experiments, from early inventors studying bird wings to modern engineers designing aircraft.

What kinds of deeper questions does the chapter say Grade 7 will explore?

Questions such as how things work, why events happen the way they do, and what we can learn from the patterns we see in nature.

Why does the chapter encourage stepping out of the classroom?

Because experiencing the world through activities and experiments leads to a deeper understanding of our environment and our place on the planet.

According to the chapter, how are the different fields of science related?

They are all interconnected — scientific ideas in one area, such as physics, often inspire discoveries or new questions in another, such as biology.

What examples of changes does the chapter say we will study this year?

Reversible and irreversible changes such as ice melting into water, fruits ripening, batteries running out, and rocks breaking into pebbles.

How did early humans tell the time before clocks?

They observed the shadows of objects cast by the Sun and used the changing position of the shadows to tell the time.

What is the aim of Activity 1.1, "Question the Answer"?

To train students to think like scientists by inventing curious, creative questions that could lead to a given answer, since great scientists ask amazing questions.

What link does the chapter make between discovery and responsibility?

It explains that human activities are linked to the natural world, so science is not only about discovery but also about responsibility for a sustainable world.

CBSE · NCERT syllabus

CBSE Class 7 — Notes, Chapters & Practice Quizzes

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Chapter 1: The Ever-Evolving World of Science — Class 7 Science

Science · 12 chapters

Summary, key terms, important questions and a practice quiz with AI diagnosis for each.

Chapter 1: The Ever-Evolving World of Science

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How does this chapter mainly describe science?

Summary

This opening chapter welcomes Grade 7 learners back to the adventure of science begun in Grade 6, presenting science not as a set of fixed facts but as an ever-evolving process of asking questions, performing experiments, and exploring the world. It reminds students that the world of science spans the very small and the very large, the near and the far — from tiny cells inside a leaf to the movement of the Sun and stars. The playful page numbers, following a butterfly and a paper plane, are used as a metaphor: just as a simple paper plane once inspired real studies of flight, curiosity makes learning take flight. The chapter then previews the year ahead, touching on the properties of materials, why some fruits are sour, electricity and the materials needed to make a lamp glow, metals and non-metals, reversible and irreversible changes, the flow of heat, the water cycle, growth and change during adolescence, life processes in animals and plants, the measurement of time and speed, light and shadows, eclipses, and the motions of the Earth and Moon. A central message is that the different fields of science — physics, chemistry, biology, and earth science — are deeply interconnected, and that discovery comes hand in hand with responsibility for the environment and society. Activity 1.1, "Question the Answer," encourages students to invent imaginative questions for given answers, training them to think like scientists who ask amazing questions, not just answer them.

Science as an evolving processCuriosity and asking questionsObservation and experimentsInterconnection of the sciencesA preview of the Grade 7 journey

Key terms

Science as a process

The idea that science is a way of thinking that welcomes curiosity, asks questions, and stays open to the unknown, rather than just a collection of facts.

Curiosity

The drive to wonder and ask "Why?" and "How?", treated as the spark that lights the flame of exploration.

Observation

Carefully noticing things in the world, often the starting point of scientific discovery, as when early inventors studied bird wings.

Experiment

A hands-on test or activity used to explore an idea, sometimes raising more questions than it answers.

Interconnection of sciences

The principle that physics, chemistry, biology, and earth science are linked, so ideas in one area inspire questions in another.

Responsibility

The understanding that human activities are connected to the natural world, and that science can help create a more sustainable world.

Important questions

Activity 1.1: Question the Answer

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Science as a process

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The idea that science is a way of thinking that welcomes curiosity, asks questions, and stays open to the unknown, rather than just a collection of facts.

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Practice quiz · The Ever-Evolving World of Science

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