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The Wonderful World of Science

NCERT Class 6 · Science Based on NCERT Class 6 Science textbook · Free CBSE study kit

Chapter Notes

**What is Science?**

Science = way of thinking, observing, and doing things to understand our world.

**The Scientific Method (5 Steps)**

1. Observe something interesting

2. Wonder and ask a question

3. Make a guess (educated guess based on observation)

4. Test through experiments or more observations

5. Analyse results to find answer

**Key Ideas**

• Curiosity is the starting point of science

• Anyone can be a scientist by following the scientific method

• Science is everywhere — home, school, kitchen, playground

• New discoveries change our understanding (science grows)

• Science is NOT just memorising — it is asking how and why

**Daily Life Examples**

• Cook wondering why dal spilled from cooker

• Bicycle repair person finding tyre air leak

• Electrician checking broken light bulb

• Student checking ink when pen stops writing

**Diagrams to Remember**

Scientific Method Cycle: Observe → Question → Guess → Test → Analyse

**Don't Confuse**

Guessing in science is NOT random — it is an educated guess based on careful observation. Wrong guesses help us learn too!

MCQs — 10 Questions with Answers

Q1. What is the most important thing to have when doing science?

  • A. Curiosity ✓
  • B. A big laboratory
  • C. An expensive microscope
  • D. A teacher watching you

Answer: A — Curiosity is what makes us ask questions and want to explore the world around us.

Q2. Which of these is an example of the scientific method in daily life?

  • A. A cook wondering why dal spilled from the cooker and checking the water level ✓
  • B. Eating lunch without thinking about food
  • C. Playing games without any purpose
  • D. Watching TV before doing homework

Answer: A — The cook observed a problem, wondered why it happened, guessed a reason, and tested it — this is the scientific method.

Q3. What are the first two steps of the scientific method?

  • A. Test and analyse
  • B. Observe and wonder ✓
  • C. Guess and test
  • D. Remember and repeat

Answer: B — The scientific method starts with observing something interesting and then wondering why it happens.

Q4. Who can be called a scientist?

  • A. Only people working in laboratories
  • B. Only people with special degrees
  • C. Anyone who follows the scientific method ✓
  • D. Only teachers and professors

Answer: C — A scientist is anyone who follows the scientific method to solve problems, including a cook, a repair person, or you.

Q5. Fill in the blank: When your pen stops writing, you might guess that __________ has finished.

  • A. The paper
  • B. The ink ✓
  • C. The desk
  • D. The notebook

Answer: B — When a pen stops writing, a reasonable guess is that the ink inside has finished.

Q6. What does science help us do?

  • A. Only solve difficult math problems
  • B. Understand the world and uncover its secrets ✓
  • C. Memorise facts for exams only
  • D. Build better buildings only

Answer: B — Science helps us understand how things work and uncover the mysteries of the world around us.

Q7. Why is science compared to a jigsaw puzzle?

  • A. Because puzzles are boring
  • B. Because each discovery adds a piece and there is no limit to discovery ✓
  • C. Because we need to sit quietly
  • D. Because it has no answer

Answer: B — Like a jigsaw puzzle, each scientific discovery adds a piece, and there is always more to discover.

Q8. What should you do after testing your guess in the scientific method?

  • A. Stop and give up
  • B. Make a new guess immediately
  • C. Analyse the results to see if your guess was correct ✓
  • D. Tell someone without checking

Answer: C — After testing, you must analyse the results to find out if your guess was right or if you need to try something else.

Q9. Which example shows someone using the scientific method?

  • A. A student sleeping in class
  • B. An electrician trying to find why a bulb is not working ✓
  • C. A person watching TV all day
  • D. Someone not interested in anything

Answer: B — The electrician is observing a problem, wondering why it happened, and testing possible reasons — this is the scientific method.

Q10. What can happen when scientists make new discoveries?

  • A. Nothing changes
  • B. Everything we knew becomes useless
  • C. Our understanding of the world changes ✓
  • D. Science stops growing

Answer: C — New discoveries in science often change our understanding of how things work, and science continues to grow.

Flashcards

What is science?

Science is a way of thinking, observing and doing things to understand the world we live in.

What is the most important thing to have in science?

Curiosity is the most important thing — it makes us ask questions and explore.

What are the 5 steps of the scientific method?

Observe, wonder and ask a question, guess a possible answer, test through experiment, and analyse the results.

Who is a scientist?

Anyone who follows the scientific method to solve problems or discover new things is working like a scientist.

Give an example of scientific method in daily life.

A cook wondering why dal spilled from cooker, guessing there was too much water, and checking the water level.

Why is science like a jigsaw puzzle?

Each new discovery adds a piece to the puzzle, and new discoveries often change our understanding of the world.

Is there a limit to what we can discover in science?

No, there is no limit — every new piece of knowledge leads to more questions and things to find out.

What did you already do without realising you used the scientific method?

When you solve problems in daily life like finding out why your pen stopped writing by checking the ink.

Name three things we will explore in science class.

We will explore plants, food and nutrition, water, materials, light, electricity, magnets, and how living organisms grow.

What happens when we discover something new in science?

It makes us wonder more, ask new questions, and sometimes changes our understanding of how things work.

Important Board Questions

What is science? [1 mark]

Define science as a way of thinking, observing, and doing things to understand the world. Use the book's definition.

List any three topics you will study in Class 6 Science and explain why science is important in daily life. [2 marks]

Topics: food and nutrition, plants, materials, water, magnets, light, electricity. Importance: helps us understand and solve problems around us.

Your friend's bicycle tyre became flat. Describe how a bicycle repair person might use the scientific method to find out what went wrong. [3 marks]

Show the 5 steps: observe the flat tyre, wonder where air leaked, guess possible reasons, test by checking the tyre, analyse which reason was correct. Use this daily-life example.

Explain the scientific method with a detailed example from your daily life. Also draw and label a diagram showing the 5 steps of the scientific method in a cycle. [5 marks]

Choose one example (pen not writing, light bulb not glowing, dal spilling). Show all 5 steps clearly. Draw a circular diagram with arrows showing: Observe → Question → Guess → Test → Analyse → back to Observe.

True or False: Only people in laboratories can be scientists. Give a reason for your answer. [2 marks]

Answer is False. Reason: Anyone who follows the scientific method (like a cook, electrician, or repair person) is working like a scientist.

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