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Chapter 1 of Class 7 science is short, and many students skim it because there is "nothing to learn". That is a mistake. The chapter tells you how the whole book fits together and asks you to practise the skill every later chapter depends on: asking a good question. This post explains what the chapter says, works through one fair test using its ideas, and gives a weekly routine for students and parents.
What is in the chapter?
In the current NCERT book Curiosity, Textbook of Science for Grade 7 (reprint 2026-27), Chapter 1 is "The Ever-Evolving World of Science". The book has twelve chapters, and the Chapter 1 PDF walks through the other eleven as one connected story:
why some fruits are sour and what happens when you wash a haldi stain (acids, bases and neutral substances)
what you need to make a lamp glow (electric circuits), leading to metals and non-metals
changes that can and cannot be reversed, such as melting ice or ripening fruit
how heat flows, from an ice cube in a glass to a melting glacier
how bodies change in adolescence, and life processes in animals and plants
how we measure time and speed
light, shadows and reflection, and finally the Earth, Moon and Sun, including eclipses
The chapter says these may look like separate chapters but "they are all interconnected". It also says science is "a process", a way of thinking that welcomes curiosity, and that it brings responsibility, because human activity is linked to what happens in nature.
What is the "Question the Answer" activity?
Section 1.1, "Happy Exploring!", contains Activity 1.1. Instead of questions, you get answers, and you must invent a question that could lead to each one:
"Just add some milk."
"Because the cat's teeth were crooked."
"Don't panic, I have my towel."
"42"
The book gives an example. If the answer is "just make it half!", the question could be about sharing a cake, an essay that is too long or a song that is too long to dance to. It repeats the line from Grade 6: "To be a wise person, you must be a whys person."
Why does asking questions matter so much?
Researchers agree with the book. In a review of the research, Chin and Osborne (2008) describe students' questions as playing "an important role in meaningful learning and scientific inquiry", and argue that much of their potential "still remains untapped" in classrooms. Their review covers the types of questions students ask and the effects of teaching students how to question.
Worked example: turning a question into a fair test
The chapter mentions "the melting of an ice cube in a glass". Here is how one curious question becomes an experiment.
Question. Does an ice cube melt faster in a steel tumbler or a glass tumbler?
Prediction. Write it down before you test: "Steel, because metal feels cold to touch and might pass heat in faster."
Fair test. Change only one thing, the tumbler. Keep everything else the same:
same size ice cubes from the same tray
same amount of water in each tumbler at room temperature
same place in the room, away from sunlight or a fan
start both at the same time
Sample readings. These are sample numbers to show how to record and read data, not real measurements:
Steel tumbler: cube gone after 11 minutes
Glass tumbler: cube gone after 14 minutes
Reading the result. In this sample the steel tumbler was 3 minutes faster (14 − 11 = 3). One trial is not enough, so repeat it three times and compare the averages. If the times were 11, 12 and 10 minutes for steel, the average is (11 + 12 + 10) ÷ 3 = 11 minutes.
New questions. As the chapter says, even an experiment that confirms your idea "might lead to some additional questions". Does a thicker glass change things? What if the water is warmer? You will meet these ideas properly in the chapter on heat. Our guide to Heat Transfer in Nature for Class 7 covers them.
What mistakes do students make with this chapter?
Skipping it. Chapter 1 is the map. Reading it first helps you see links between later chapters.
Asking only "What is" questions. "What is 32 + 10?" is a question the book itself says is too obvious. Aim for "How", "Why" and "What happens if".
Changing two things at once. If you use a different tumbler and warmer water, you cannot tell which change mattered.
Trusting one trial. Repeat and average.
Thinking an unexpected result is a failure. It is the start of the next question.
A weekly routine for the habit
Monday: Write three questions about something at home, such as why a steel spoon gets hot in tea.
Tuesday: Pick one and sort it: can it be tested at home, looked up, or neither?
Wednesday: Plan a fair test for a testable one. List what you change and what you keep the same.
Thursday: Run it and record readings in a table in your notebook.
Friday: Write one line on what you found and one new question it raises.
Weekend: Try Activity 1.1 with a family member: one person gives an answer, the other invents the question.
If you studied Grade 6 with the new book, compare this chapter with its opener, covered in our post on the Wonderful World of Science in Class 6.
When a question leads somewhere you cannot follow alone, Fermi's AI tutor decides whether to explain, ask or show, so a curious student gets a conversation rather than a one-line answer.
This evening, write one testable question about something in your kitchen and plan the fair test before dinner.
