🌍 Human Body & Science Basics – Class 6 Notes | Vocabulary, MCQs & Q&A (NCERT/NCF 2023)
Class 6 Science Chapter 1 notes with important words, MCQs, and question answers?
Here is a complete, easy-to-understand guide based on NCF 2023 to help students learn quickly and revise effectively.
📘 Chapter: The Wonderful World of Science
Science is not just a subject—it is a way of thinking, observing, and understanding the world around us. It begins with curiosity and helps us explore everything from nature to daily life.
🔑 Important Keywords & Definitions
1. Science
Science is a way of thinking, observing, and understanding the world around us.
2. Curiosity
The desire to learn and ask questions.
3. Observation
Carefully watching and noticing things.
4. Question
A thought that arises when we want to know something.
5. Hypothesis
A possible guess or explanation.
6. Experiment
A test to check whether the hypothesis is correct.
7. Analysis
Studying results carefully.
8. Conclusion
The final answer after testing.
9. Scientific Method
A step-by-step process to solve problems:
Observation → Question → Hypothesis → Experiment → Analysis → Conclusion
10. Scientist
A person who follows the scientific method.
🧠 Multiple Choice Questions (MCQs)
1. Science is mainly a way of:
a) Playing games b) Thinking and understanding c) Sleeping d) Drawing
✅ Answer: b
2. The first step of scientific method is:
a) Conclusion b) Experiment c) Observation d) Analysis
✅ Answer: c
3. Curiosity means:
a) Fear b) Anger c) Desire to know d) Laziness
✅ Answer: c
4. A hypothesis is:
a) Final answer b) Guess c) Result d) Observation
✅ Answer: b
5. Which is NOT a step of scientific method?
a) Observation b) Experiment c) Guess d) Sleeping
✅ Answer: d
6. Science helps us to:
a) Ignore things b) Understand the world c) Forget things d) Sleep more
✅ Answer: b
7. Who can be a scientist?
a) Only lab workers
b) Only teachers
c) Anyone who follows scientific method
d) Only doctors
✅ Answer: c
8. Observation means:
a) Guessing b) Watching carefully c) Writing d) Concluding
✅ Answer: b
9. Scientific knowledge:
a) Never changes
b) Always remains same
c) Changes with discoveries
d) Is fixed
✅ Answer: c
10. Science is like a:
a) Game b) Puzzle c) Story d) Song
✅ Answer: b
QUESTIONS & ANSWERS
1. What is science? Explain with examples.
Answer:
Science is a way of understanding the world around us through observation, thinking, and experimentation. It helps us answer questions about nature, daily life, and the universe.
Science is not limited to books or laboratories. It is present in everything we do.
Examples:
When we cook food, heat changes raw food into cooked food.
When plants grow, they need sunlight, water, and air.
When it rains, it is part of the water cycle.
Thus, science helps us understand both simple and complex phenomena in our surroundings.
2. Why is curiosity important in learning science?
Answer:
Curiosity is the desire to know and learn new things. It is the starting point of science.
When we are curious:
We ask questions like Why, How, and What
We try to explore and observe things carefully
We attempt to find answers through thinking and testing
Without curiosity, learning becomes memorization. With curiosity, learning becomes interesting and meaningful.
For example, asking “Why do stars shine?” or “Why do plants grow?” leads to scientific discovery.
3. Explain the scientific method in detail with an example.
Answer:
The scientific method is a step-by-step process used to solve problems and find answers.
Steps:
Observation – Noticing something
Question – Asking why or how
Hypothesis – Making a possible guess
Experiment – Testing the guess
Analysis – Studying results
Conclusion – Final answer
Example: Pen stops writing
Observation → Pen is not writing
Question → Why is it not working?
Hypothesis → Ink might be finished
Experiment → Check refill
Analysis → Ink is empty
Conclusion → Pen stopped due to no ink
This shows how we use science in daily life situations.
4. How is science present everywhere in our daily life?
Answer:
Science is present in every aspect of our life—from nature to daily activities.
Examples:
Cooking: Heat changes food (chemical change)
Breathing: Oxygen is taken in, carbon dioxide is released
Playing: Movement involves force and energy
Weather: Rain, wind, and seasons are natural processes
Household items: Plastic, metal, and wood are different materials
Thus, science is not limited to classrooms—it is all around us.
5. Why is science called a continuous and changing process?
Answer:
Science is called a continuous process because:
New discoveries are made regularly
Old ideas can change with new evidence
Knowledge keeps improving over time
For example:
Earlier people believed the Earth was flat, but later discoveries proved it is spherical.
This shows that science is like a growing puzzle, where each discovery adds a new piece.
6. Who is a scientist? Can ordinary people be scientists? Explain.
Answer:
A scientist is a person who follows the scientific method to solve problems and discover new things.
Yes, ordinary people can also be scientists because:
Anyone who observes, questions, and tests ideas is using science
Examples:
A cook checking why food burned
A mechanic fixing a bicycle
A student solving a problem
Thus, science is not limited to laboratories—it is a skill anyone can use.
7. Explain the importance of observation in science.
Answer:
Observation is the first and most important step in science.
It helps us:
Notice changes and patterns
Identify problems
Ask meaningful questions
Example:
If a plant is not growing well, observation helps us see:
Is it getting enough sunlight?
Is it watered properly?
Good observation leads to better understanding and correct conclusions.
8. How are different scientific ideas connected to each other?
Answer:
Scientific ideas are interconnected because:
One concept often leads to another
Different topics are related in real life
Examples:
Plants need sunlight → linked to energy
Water changes form → linked to temperature
Food gives energy → linked to body functions
Thus, science is not separate topics—it is a connected system of knowledge.
9. Explain the role of teamwork in science.
Answer:
Science is rarely done alone. Scientists often work in teams.
Importance of teamwork:
Sharing ideas improves understanding
Different people bring different skills
Problems can be solved faster
Example:
Large discoveries like space missions involve many scientists working together.
Thus, collaboration makes science more effective and interesting.
10. Why should we ask “WHY” in science? Explain.
Answer:
Asking “WHY” is important because:
It leads to deeper understanding
It develops critical thinking
It helps in discovering new ideas
Example:
Why does it rain?
Why do objects fall?
Such questions lead to scientific explanations.
👉 A wise person is one who keeps asking questions and seeking answers.
🎯 BONUS REFLECTION QUESTION (NCF STYLE)
Q. Describe a situation where you used the scientific method in real life.
👉 Students can write their own experience (pen not working, plant not growing, etc.)
