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Class 7 Science: The Ever-Evolving World of Science, 8 practice questions with answers

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These are 8 practice questions on Class 7 Science Chapter 1, The Ever-Evolving World of Science, of the new NCERT textbook, Curiosity. Each has a worked answer and the textbook page it comes from. They cover what science is, how its subjects connect, why experiments lead to more questions, and a few of the ideas the chapter previews for the year. Try each one before you open the answer.

These questions are our own, drafted with AI help, and every answer was checked against the textbook page it cites, but no practising teacher has reviewed them yet. If you find a mistake, please tell us.

What the chapter says you need

Facts from the NCERT textbook (Curiosity: Textbook of Science for Grade 7, Chapter 1, printed pages 1 to 6):

What science is

Question 1. Kabir says, "Science is a list of facts that we learn by heart from the textbook." Find his mistake.

Answer: science is a process, a way of thinking, not just a list of facts. The chapter says the book is not just a textbook with facts but an invitation to question, to perform experiments and to explore. Science is a way of thinking that welcomes curiosity, asks questions and is open to the unknown. (Science as a process, pages 1 and 2.)

Question 2. Meena does an experiment, and the result is just what she expected. She says, "Good, now there is nothing more to ask about it." Is she right?

Answer: no; even experiments that confirm what we expect can lead to more questions and more experiments. The chapter says that experiments that seem to confirm what we think will happen might lead to additional questions, which need more experiments and more questions. Finding out is an ongoing process. (Experiments and questions, page 5.)

Question 3. Sohan says, "Physics and biology are different subjects, so they have nothing to do with each other." Find his mistake.

Answer: the fields of science are interconnected. Physics, chemistry, biology and earth sciences may appear as different chapters, but they are all interconnected: scientific ideas in one area often inspire discoveries in another, or at least allow us to ask questions in another area. (Connected fields, page 2.)

Question 4. The chapter says science is not only about discovery but also about responsibility. What does it mean?

Answer: human activities are linked to what happens in the natural world and to society, and science can help solve environmental problems. The chapter hopes that young science explorers will see how human activities are linked to the natural world and to the society we live in, and the role science can play in addressing environmental challenges and creating a more sustainable world. (Responsibility, page 2.)

Ideas the chapter looks ahead to

Question 5. Long before clocks and watches, how did people tell the time, according to the chapter?

Answer: by the position of the shadows of objects in the Sun. Early humans observed the shadows of objects in the Sun and used the position of the shadows to tell the time. (Telling time, page 4.)

Question 6. The chapter says the Earth and the Moon can cast shadows. What do these shadows lead to?

Answer: eclipses. Light and shadows are not limited to things around us at home: even the Earth and the Moon can cast shadows, which lead to the fascinating phenomena of eclipses. (Eclipses, page 5.)

Question 7. Which simple toy does the chapter say inspired real scientific explorations of flight?

Answer: a paper plane. The chapter says something as simple as a paper plane inspired real scientific explorations of flight; from early inventors studying bird wings to modern engineers designing aircraft, the dream of flying started with simple observations and experiments. (The paper plane, page 1.)

Question 8. Why does the chapter say we have to step out of the book, and perhaps the classroom?

Answer: to experience the world through activities and experiments, which are stepping stones to a deeper understanding. To ask deeper questions, such as how things work and why events happen as they do, we have to experience the world through activities and experiments. These help us understand the environment and our place on the planet, and to see science as an ongoing process of discovery. (Stepping out of the book, page 2.)

Questions students ask

Why is it called the ever-evolving world of science? Because science is an ongoing process of discovery: every answer and experiment can lead to new questions, so our understanding keeps growing. (Pages 2 and 5.)

What is Activity 1.1 about? Turning the usual task around: you are given answers and must think of curious, creative questions that could lead to them, because asking interesting questions is part of thinking like a scientist. (Pages 5 and 6.)

What fields of science does the Class 7 book cover? Topics from physics, chemistry, biology and earth sciences, which are all interconnected. (Page 2.)

Practise more, and check your marks

Where CMDLearn fits

CMDLearn is building an AI tutor for Classes 1 to 10 that explains a step and checks the child's working, but leaves the writing to the child. It is still in development, and no child uses it yet. If you would like to hear when there is something to try, you can join the waitlist.

Sources

All opened and read on 22 October 2026. Page numbers are the printed page numbers of the textbook; printed page = PDF page.

The facts are from the textbook pages above. The questions and worked answers are our own. This guide is general information; follow your teacher and the textbook.