NCERT Solutions for Class 7 Science (Curiosity) Chapter 1: The Ever-Evolving World of Science (NCERT 2026–27)

These Class 7 Science Curiosity Chapter 1 solutions cover The Ever-Evolving World of Science from the new NCF-2023 textbook (2026–27). Chapter 1 is the year’s opening chapter: it invites you to continue the journey begun in Grade 6 and to see science as an ongoing process of asking questions, doing experiments and exploring the world, rather than presenting a single science topic.

Class: 7 Subject: Science Book: Curiosity Chapter: 1 Type: Introductory (Activity 1.1 & Happy Exploring) Session: 2026–27
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Note: Chapter 1 of Curiosity is an introductory chapter and does not have an end-of-chapter “Let us enhance our learning” / “Keep the curiosity alive” exercise. Its only task is Activity 1.1: Question the Answer, which is reproduced verbatim and modelled below, along with extra practice in the chapter’s theme.

Class 7 Science Curiosity Chapter 1 Solutions – Overview

Chapter 1 of Curiosity, The Ever-Evolving World of Science, sets the tone for Grade 7 science. It reminds us that science is not just a collection of facts but a process — a way of thinking that welcomes curiosity, asks questions and stays open to the unknown. The chapter takes a quick journey through the whole book: we begin with the properties of materials (why some fruits are sour, what removes a haldi stain), then play with batteries, lamps and wires, classify metals and non-metals, study reversible and irreversible changes, follow how heat flows and how water moves, explore life processes in animals and plants, learn to measure time and motion, and finally investigate light, shadows, eclipses and the movements of the Earth, Moon and Sun. The big message is that all these fields are interconnected, that human activities are linked to the natural world, and that science can help build a more sustainable world. The page numbers, drawn as a butterfly and a paper plane, capture this spirit — learning takes flight when curiosity leads the way.

Key Concepts & Ideas

Science as a process: science is not just facts to memorise — it is a way of thinking that welcomes curiosity, asks questions and is open to the unknown.

Asking deeper questions: in Grade 7 we ask How do things work? Why do events happen the way they do? What can we learn from patterns in nature?

Learning by doing: we step out of the book and classroom to experience the world through activities and experiments that lead to deeper understanding.

Interconnected fields: physics, chemistry, biology and earth science look like separate chapters, but ideas in one area inspire discoveries or questions in another.

Science and responsibility: human activities are linked to the natural world and to society, and science can help address environmental challenges and create a more sustainable world.

Curiosity and questioning: “To be a wise person, you must be a whys person” — great scientists do not just answer questions, they ask amazing ones.

Activity 1.1 — “Question the Answer” (Solved)

In tests we are usually given a question and asked for the answer. This activity turns that around: you are given an answer, and your task is to invent a curious, creative question that could lead to it. There are never any wrong questions here, so any sensible, imaginative question is correct. The book’s four answers are reproduced verbatim below, each with a model question (and a few extra ideas) to show the kind of thinking expected.

Tip from the book: avoid obvious questions like “What is 32 + 10?” — aim for interesting, fun ones.

Q. Question: ____________ ?   Answer: Just add some milk.

MODEL QUESTION “My tea tastes too strong and bitter — what should I do?” Other curious questions that fit: “How do I make this batter thinner for dosas?” · “The mashed potato is too dry — how can I soften it?” · “How can I lighten the colour of this coffee?” (Your own creative question is accepted.)

Q. Question: ____________ ?   Answer: Because the cat’s teeth were crooked.

MODEL QUESTION “Why couldn’t the cat hold the toy mouse properly in its mouth?” Other fun questions: “Why did the cat’s smile look so funny in the photo?” · “Why did the vet send the cat for a dental check-up?” (Your own imaginative question is accepted.)

Q. Question: ____________ ?   Answer: Don’t panic, I have my towel.

MODEL QUESTION “What will you do if you get soaked in the sudden rain on the way to the bus?” Other playful questions: “We’re going to the beach — aren’t you worried about getting wet?” · “The tap is leaking everywhere — what should we grab first?” (Any reasonable question is accepted.)

Q. Question: ____________ ?   Answer: 42

MODEL QUESTION “How many students are there in our classroom today?” Other interesting (non-obvious) questions: “How many steps are there from the ground floor to the terrace?” · “How many windows can you count in the whole school building?” The book asks us to avoid dull questions like “What is 32 + 10?” and instead think of something more curious. (Your own question is accepted.)

Q. What does this activity teach us about thinking like a scientist?

ANSWER It shows that asking good questions is just as important as finding answers. By starting from an answer and imagining the questions behind it, we practise looking at the world in fresh ways. This is how scientists begin every discovery — they notice something, wonder “why?” and turn that wonder into a question they can explore. In short: to be a wise person, you must be a whys person.

Common Misconceptions to Avoid

Watch out for these

  • Thinking science is only a list of facts to memorise — it is really a process of questioning, experimenting and exploring.
  • Believing the chapters of the book are unrelated — physics, chemistry, biology and earth science are all interconnected.
  • Thinking science happens only in a laboratory — we can observe and experiment at home, in the kitchen and outdoors too.
  • Assuming there are “wrong” questions in Activity 1.1 — the activity has no wrong questions; creativity is what matters.
  • Forgetting that science carries responsibility — our activities affect the natural world and society.
  • Treating an experiment as the end — even results that confirm what we expected can lead to new questions and more experiments.

Extra Practice Questions

Very Short / Short Answer Type Questions

Q1. Science is best described as a collection of facts or as a process. Which is correct?

ANSWERAs a process — a way of thinking that welcomes curiosity, asks questions and stays open to the unknown.

Q2. Write the kinds of “deeper questions” the chapter says we will ask in Grade 7.

ANSWERHow do things work? Why do events happen the way they do? And what can we learn from the patterns we see in nature?

Q3. What do the butterfly and paper plane drawn near the page numbers stand for?

ANSWERThey show that learning “takes flight” when curiosity leads the way — just as a butterfly flutters freely and a paper plane soars, ideas soar when we explore and imagine.

Q4. Give one example from the chapter of a material question we will explore this year.

ANSWERWhy are some fruits sour? Or: what happens when we wash a haldi (turmeric) stain on a school uniform?

Q5. What does the saying “To be a wise person, you must be a whys person” mean?

ANSWERIt means that wisdom comes from constantly asking “why?” Curious people who keep questioning the world learn the most and think like scientists.

Long Answer Type Questions

Q1. “The different chapters of this book are all interconnected.” Explain this idea with examples.

ANSWERAlthough the book is divided into chapters on physics, chemistry, biology and earth science, the ideas in them are deeply linked. For example, when we study the properties of materials and then play with batteries, lamps and wires, the same materials lead us to classify metals and non-metals. Understanding heat flow helps explain why ice melts and why water evaporates from the seas and falls as rain — connecting changes in materials with the water cycle in earth science. The Sun’s heat drives that water cycle, and the Sun’s light also gives us day and night and shadows, linking to light and astronomy. In this way a scientific idea in one area often inspires discoveries or new questions in another, which is why the chapter says all the fields of science are interconnected.

Q2. The chapter says science is “not just about discovery alone, but also about responsibility.” Discuss.

ANSWERScience gives us the joy of discovery, but it also reminds us of our duties. As young science explorers we soon see that human activities are linked to what happens in the natural world and to the society we live in. Cutting forests, polluting rivers or wasting energy harms the environment, while careful, science-based choices can protect it. The chapter therefore says science can play a role in addressing environmental challenges and in helping create a more sustainable world. So learning science is not only about understanding nature, but also about using that understanding responsibly to look after our planet and our place on it.

Q3. Why does the chapter encourage us to ask questions and do experiments rather than only read the book?

ANSWERReading alone gives us facts, but it cannot give us real understanding. The chapter urges us to step out of the book and the classroom and experience the world through activities and experiments. These experiences are stepping stones to a deeper understanding of our environment and our place on the planet, and they help us see science as an ongoing process of discovery. Importantly, even experiments that seem to confirm what we already expected can lead to new questions that need further experiments. By doing rather than only reading, we learn to think like scientists — observing carefully, questioning everything and making small discoveries for ourselves.

MCQs & Assertion–Reason

1. According to Chapter 1, science is best understood as:

(a) only a set of facts    (b) a process and a way of thinking    (c) a list of formulas    (d) something only adults can do

2. The page numbers in the Curiosity book are drawn as:

(a) a bird and a fish    (b) a butterfly and a paper plane    (c) a kite and a root    (d) a Sun and a Moon

3. Which question is an example of the “material” questions the chapter says we will explore?

(a) Why are some fruits sour?    (b) How does the heart beat?    (c) Why is the sky blue?    (d) How do plants make food?

4. The chapter says the different fields of science are:

(a) completely separate    (b) interconnected    (c) unrelated to daily life    (d) only about physics

5. “To be a wise person, you must be a ______ person.”

(a) busy    (b) quiet    (c) whys    (d) clever

6. In Activity 1.1, “Question the Answer”, the student is asked to:

(a) find the answer to a question    (b) invent a question for a given answer    (c) copy the answer    (d) ignore the answer

7. In Activity 1.1, which of these is given as one of the answers?

(a) Just add some salt    (b) 42    (c) Run away quickly    (d) Switch off the light

8. The chapter says human activities are linked to:

(a) nothing in nature    (b) the natural world and society    (c) only the kitchen    (d) only machines

9. With the heat from the Sun, water from the seas:

(a) freezes    (b) evaporates and falls as rain    (c) disappears forever    (d) turns into oil

10. The chapter says even experiments that confirm what we expect:

(a) prove science is finished    (b) should be forgotten    (c) may lead to new questions and more experiments    (d) are a waste of time

Answer key: 1-(b), 2-(b), 3-(a), 4-(b), 5-(c), 6-(b), 7-(b), 8-(b), 9-(b), 10-(c).

For each Assertion–Reason question, choose: (A) Both true and the Reason correctly explains the Assertion; (B) Both true but the Reason is not the correct explanation; (C) Assertion true, Reason false; (D) Assertion false, Reason true.

A-R 1. Assertion: Science is a process, not just a collection of facts.

Reason: Science is a way of thinking that welcomes curiosity, asks questions and is open to the unknown.

A-R 2. Assertion: The chapters of the Curiosity book are interconnected.

Reason: A scientific idea in one field often inspires discoveries or questions in another.

A-R 3. Assertion: In Activity 1.1 there are right and wrong questions.

Reason: The activity encourages creative thinking and says there are never any wrong questions.

A-R 4. Assertion: Science is about discovery as well as responsibility.

Reason: Human activities are linked to the natural world and science can help build a sustainable world.

A-R 5. Assertion: Doing experiments and activities helps us understand the world more deeply than reading alone.

Reason: Experiences serve as stepping stones to a deeper understanding and can lead to new questions.

Answer key: 1-(A), 2-(A), 3-(D), 4-(A), 5-(A).

Quick Revision Summary

  • Science is a process — a way of thinking that welcomes curiosity, asks questions and stays open to the unknown.
  • In Grade 7 we ask deeper questions: How do things work? Why do events happen? What patterns do we see in nature?
  • We learn by doing activities and experiments, not only by reading.
  • The book’s fields — materials, electricity, metals/non-metals, changes, heat, water, life processes, time and motion, light, and the Earth–Moon–Sun — are all interconnected.
  • Science carries responsibility: human activities affect nature and society, and science can help create a sustainable world.
  • Activity 1.1 “Question the Answer”: invent a creative question for each given answer; there are no wrong questions. “To be a wise person, you must be a whys person.”

Real-life Applications

The habit of seeing science everywhere works far beyond the classroom. A cook who wonders why some fruits are sour, a parent removing a stubborn haldi stain, a child watching ice melt in a glass, or a family noticing rain after a hot day — all of these are science at work. The same curiosity that asks “why?” helps a gardener find why one plant grows better, helps an engineer improve a paper plane’s flight, and helps scientists study big questions like climate change and a sustainable future. Chapter 1 prepares you to carry this questioning, experimenting spirit into every later topic in Curiosity — materials, electricity, heat, life processes, light and the sky.

How to score full marks in this chapter

Remember the chapter’s big ideas in your own words: science is a process, the fields are interconnected, and science means both discovery and responsibility. For Activity 1.1, write a creative, non-obvious question for each answer — examiners reward imagination, and there are no wrong questions. Quote the textbook’s own touches (the butterfly-and-paper-plane page numbers, the sour-fruit and haldi-stain examples, and “to be a wise person, you must be a whys person”) to show you have read the chapter closely.

Frequently Asked Questions

What is Class 7 Science Curiosity Chapter 1 about?

Chapter 1, The Ever-Evolving World of Science, is an introductory chapter. It explains that science is a process of curiosity, questioning and experimenting, takes a quick journey through all the topics in the book, and shows that the different fields of science are interconnected and tied to responsibility for the natural world.

Does Chapter 1 of Curiosity have an exercise?

No. It is an introductory chapter, so instead of an end-of-chapter “Let us enhance our learning” exercise it has only Activity 1.1: Question the Answer, which is reproduced and modelled in full on this page along with extra practice questions.

What is Activity 1.1 “Question the Answer”?

It is an activity that reverses the usual test: you are given an answer (such as “Just add some milk” or “42”) and must invent a curious, creative question that could lead to it. There are no wrong questions — it teaches you that asking good questions is as important as finding answers.

Are these Class 7 Science Curiosity Chapter 1 solutions free?

Yes. All solutions are free and follow the official NCERT Curiosity textbook for 2026–27.

All Curiosity Chapters Class 7 Science Chapter 2 →
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