NCERT Class 7 Science MCQ | Chapter 1: The Ever-Evolving World of Science
1. What is science primarily concerned with?
(A) Memorising facts from books
(B) Understanding the natural world through observation and inquiry
(C) Learning only about machines
(D) Studying only living organisms
Answer: (B) Understanding the natural world through observation and inquiry
2. Which of the following is an important starting point for scientific investigation?
(A) Curiosity
(B) Guessing without evidence
(C) Memorisation
(D) Copying information
Answer: (A) Curiosity
3. Which of the following activities is most closely related to scientific inquiry?
(A) Asking questions and testing ideas
(B) Accepting every statement without examination
(C) Memorising answers without understanding
(D) Avoiding experiments
Answer: (A) Asking questions and testing ideas
4. Why do scientists perform experiments?
(A) To support every idea they already have
(B) To obtain evidence and test ideas
(C) To avoid making observations
(D) To memorise scientific terms
Answer: (B) To obtain evidence and test ideas
5. Which quality encourages a person to ask questions about things happening around them?
(A) Curiosity
(B) Carelessness
(C) Laziness
(D) Fear
Answer: (A) Curiosity
6. Which of the following best describes science?
(A) A fixed collection of facts that never changes
(B) A process of exploring and understanding the world
(C) A subject limited to laboratories
(D) A collection of guesses
Answer: (B) A process of exploring and understanding the world
7. Which of the following is an example of a scientific question?
(A) Why does a shadow change its position during the day?
(B) Which colour is the prettiest?
(C) Which game is the most entertaining?
(D) Which song is the best?
Answer: (A) Why does a shadow change its position during the day?
8. What should a scientist do when an observation does not agree with an existing idea?
(A) Ignore the observation
(B) Change the observation
(C) Reconsider and investigate the idea
(D) Stop asking questions
Answer: (C) Reconsider and investigate the idea
9. Why is asking questions important in science?
(A) Questions help us investigate and understand phenomena
(B) Questions prevent experiments
(C) Questions replace evidence
(D) Questions make observations unnecessary
Answer: (A) Questions help us investigate and understand phenomena
10. Which of the following is an example of observing a natural phenomenon?
(A) Watching a plant grow
(B) Memorising a definition
(C) Copying a diagram
(D) Reading a chapter without observing anything
Answer: (A) Watching a plant grow
11. Which of the following branches of science are connected with the study of different aspects of the natural world?
(A) Physics, chemistry, biology and earth science
(B) Only physics
(C) Only biology
(D) Only chemistry
Answer: (A) Physics, chemistry, biology and earth science
12. Why are different branches of science interconnected?
(A) Natural phenomena often involve more than one area of science
(B) Every branch studies exactly the same thing
(C) Scientists never work in different fields
(D) Science has only one subject
Answer: (A) Natural phenomena often involve more than one area of science
13. Which branch of science mainly deals with matter, energy, force and motion?
(A) Biology
(B) Physics
(C) Chemistry
(D) History
Answer: (B) Physics
14. Which branch of science mainly deals with substances and their changes?
(A) Chemistry
(B) Biology
(C) Physics
(D) Geography
Answer: (A) Chemistry
15. Which branch of science mainly deals with living organisms?
(A) Physics
(B) Chemistry
(C) Biology
(D) Astronomy
Answer: (C) Biology
16. Which of the following shows how science can be connected with everyday life?
(A) Studying why milk changes into curd
(B) Memorising a poem
(C) Drawing without observation
(D) Copying a timetable
Answer: (A) Studying why milk changes into curd
17. What can scientists learn by carefully observing a phenomenon?
(A) Evidence that may help explain the phenomenon
(B) An answer without investigation
(C) A fact that never needs testing
(D) Nothing useful
Answer: (A) Evidence that may help explain the phenomenon
18. Which approach is most suitable when trying to understand why something happens?
(A) Observe, ask questions and investigate
(B) Guess and never check
(C) Ignore evidence
(D) Accept the first explanation
Answer: (A) Observe, ask questions and investigate
19. Why is science described as an evolving field?
(A) Scientific knowledge can grow and change as new evidence is obtained
(B) Scientific knowledge is always based on guesses
(C) Scientific ideas cannot be tested
(D) Scientists never change their explanations
Answer: (A) Scientific knowledge can grow and change as new evidence is obtained
20. Which of the following demonstrates scientific thinking?
(A) Asking how and why something happens
(B) Accepting a claim without evidence
(C) Refusing to perform experiments
(D) Avoiding observations
Answer: (A) Asking how and why something happens
21. How did people in earlier times use shadows to estimate time?
(A) By observing the changing position of shadows
(B) By measuring the temperature of shadows
(C) By listening to shadows
(D) By observing the colour of the sky only
Answer: (A) By observing the changing position of shadows
22. Which of the following is an example of using science to understand light?
(A) Investigating how light helps us see objects
(B) Memorising the names of colours only
(C) Avoiding observations of light
(D) Studying only the sound produced by objects
Answer: (A) Investigating how light helps us see objects
23. What is an important habit of a person with a scientific attitude?
(A) Being willing to question and investigate
(B) Believing every claim immediately
(C) Avoiding evidence
(D) Refusing to change an idea
Answer: (A) Being willing to question and investigate
24. Which statement about scientific knowledge is correct?
(A) It can develop as new observations and evidence become available
(B) It must always remain unchanged
(C) It is based only on personal opinions
(D) It does not require observation
Answer: (A) It can develop as new observations and evidence become available
25. What is one of the main messages of the chapter “The Ever-Evolving World of Science”?
(A) Science is only about remembering facts
(B) Science encourages curiosity, questioning, exploration and understanding
(C) Science is useful only inside laboratories
(D) Science does not involve everyday experiences
Answer: (B) Science encourages curiosity, questioning, exploration and understanding
