CBSE Class 6 Science Chapter 1: The Wonderful World of Science — MCQ Test

Science is a systematic way of understanding the world around us through careful observation, asking questions, and performing experiments. It is not limited to textbooks or laboratories — science is present in everyday life.

Observation is always the first step in the scientific method. A scientist first carefully observes something, then asks questions, forms a hypothesis, tests it, and draws conclusions. Without observation, there is no starting point for inquiry.

A hypothesis is a tentative explanation or prediction about something that has not yet been proven. It must be tested through experiments before it can be accepted or rejected. A hypothesis is NOT a proven fact.

Science does NOT provide final and unchangeable answers. Scientific knowledge is always open to revision when new evidence is found. This is what makes science reliable and self-correcting. All other options (a), (b), and (c) are true characteristics of science.

After forming a hypothesis, a scientist designs and conducts experiments to test whether the hypothesis is correct. The results of the experiment either support or contradict the hypothesis, leading to further investigation or a conclusion.

All five sense organs — eyes (sight), ears (hearing), nose (smell), tongue (taste), and skin (touch) — are used in scientific observation. A scientist uses all available senses to gather information about the world around them.

Repeating experiments multiple times ensures that the results are not due to chance or experimental error. Consistent results across multiple trials give confidence that the findings are reliable and can be trusted as scientific evidence.

C.V. Raman (Sir Chandrasekhara Venkata Raman) won the Nobel Prize in Physics in 1930 for his discovery of the Raman Effect — the scattering of light when it passes through a transparent material. He was the first Asian to win a Nobel Prize in science.

Technology is the practical application of scientific knowledge to develop tools, machines, medicines, and solutions that help humans. While science asks "how and why does this work?", technology asks "how can we use this knowledge to solve problems?"

The new NCERT Class 6 Science textbook introduced in 2024-25 is titled Curiosity. The name reflects the spirit of scientific inquiry — being curious about the world around us and exploring it through questioning and experimentation.

"Is this painting beautiful?" is a question about aesthetics and personal taste — it cannot be measured, tested, or proven scientifically. Science answers questions about observable, measurable phenomena. Questions about art, emotions, and values are beyond the scope of science.

The correct order is: Observe → Question → Hypothesis → Experiment → Conclusion. First you observe something, then ask a question about it, form a hypothesis, test it through experiments, and finally draw a conclusion based on your results.

A microscope is used to observe objects that are too small to see with the naked eye, such as bacteria and cells. A telescope is used to observe distant objects. Scientific instruments extend our natural senses beyond their limits.

All three options are examples of science in everyday life. Cooking involves chemical reactions, plants growing towards sunlight is phototropism, and ice melting involves change of state. Science is not limited to laboratories — it is present everywhere around us.

A good scientist must revise or reject the hypothesis if the experimental results do not support it. Changing results or ignoring evidence is unethical and unscientific. Science is always guided by evidence, not personal belief or ego.

Dr. A.P.J. Abdul Kalam is known as the Missile Man of India and the father of India's missile program. He later became the 11th President of India. He was a great scientist, engineer, and a source of inspiration for millions of students.

Scientific thinking means questioning, observing, and finding answers through evidence. It is not about memorising facts or blindly believing things. Scientific thinking is a natural human ability that can be developed by anyone — not just scientists.

Science has improved human life in countless ways — vaccines and medicines have saved billions of lives, electricity has transformed society, and advances in agriculture feed the growing population. All three options are correct examples of science benefiting humanity.

Aryabhata (476–550 CE) was an ancient Indian mathematician and astronomer who made revolutionary contributions to mathematics and astronomy. He calculated the value of pi, explained the rotation of the Earth, and worked on the concept of zero — over 1500 years ago.

The spirit of science is never-ending curiosity and exploration. Every answer leads to new questions, and science is a continuous journey of discovery. This is exactly why the new NCERT Class 6 Science textbook is named Curiosity — to inspire students to keep asking questions and exploring the wonderful world of science.