The following 20 Multiple Choice Questions (MCQ) are based on
Chapter 1: Exploring the Investigative World of Science from the NCERT Class 8
Science textbook Curiosity. Each question has four options - select the
best answer and click to check.
Instructions: Read each question carefully. Choose the most
appropriate option from (a), (b), (c), or (d). Click
Show Answer to reveal the correct answer with explanation.
Multiple Choice Questions
1What is the main aim of a scientific investigation?
(a) To memorise facts
(b) To answer focused questions using evidence
(c) To prove the investigator is always right
(d) To avoid observations
(b) is correct
An investigation uses focused questions, planned tests and observations to build evidence-based explanations.
2Which combination best represents scientific investigation?
(a) Questioning, observing, experimenting and explaining
(b) Reading without testing
(c) Changing every condition together
(d) Guessing, memorising and repeating
(a) is correct
Systematic inquiry begins with questions and proceeds through careful observation, testing and explanation.
3The root symbol shown on left-hand pages represents:
(a) Only plant biology
(b) A final answer
(c) A solid foundation of knowledge
(d) Ideas without evidence
(c) is correct
The root symbolises grounded knowledge connected with observations, environment, traditions and heritage.
4The soaring kite in the page design reminds learners to:
(a) Study only outdoors
(b) Avoid creative ideas
(c) Let curiosity explore the unknown
(d) Ignore evidence
(c) is correct
The kite represents creative curiosity and exploration toward new horizons.
5Why must the root and kite ideas be balanced?
(a) Investigation needs careful observation and creative thinking
(b) Facts and imagination must never interact
(c) Every idea is correct without testing
(d) Only old knowledge matters
(a) is correct
Good science stays grounded in evidence while using creativity to frame questions and explanations.
6Which is a focused, testable question about a puri?
(a) Does oil temperature affect the time a puri takes to puff?
(b) Who makes the best puri?
(c) Is fried food beautiful?
(d) Are puris wonderful?
(a) is correct
Oil temperature and puffing time can be controlled or measured in an investigation.
7In an experiment on oil temperature and puri puffing, the factor deliberately changed is:
(a) Method of recording time
(b) Observation table
(c) Oil temperature
(d) Puri thickness kept constant
(c) is correct
The deliberately changed factor is the variable being tested.
8Which could be measured as an outcome in the puri investigation?
(a) Day of the week only
(b) Time taken to puff
(c) Name of the investigator
(d) Colour of the notebook
(b) is correct
Puffing time is a measurable response that can be compared across trials.
9Why should an investigator change only one factor at a time?
(a) To make the test unfair
(b) To identify which factor caused the observed effect
(c) To avoid taking notes
(d) To guarantee the expected result
(b) is correct
Keeping other conditions constant makes a fair comparison and supports a clearer conclusion.
10When testing different oil temperatures, which condition should be kept the same?
(a) Oil temperature
(b) The factor under investigation
(c) The measured puffing time
(d) Thickness of each dough circle
(d) is correct
The dough pieces should be comparable so temperature is the main difference between trials.
11Which observation is qualitative?
(a) Its diameter was 10 cm
(b) The oil was at 180 C
(c) The puri puffed
(d) It puffed in 12 seconds
(c) is correct
A yes/no description is qualitative, while the other options give numerical measurements.
12Which observation is quantitative?
(a) The dough felt soft
(b) The oil smelled smoky
(c) The puri looked round
(d) The puri puffed in 8 seconds
(d) is correct
A time in seconds is a numerical measurement.
13Why should observations be recorded during an experiment?
(a) To rely only on memory
(b) To compare results and identify patterns
(c) To hide unexpected results
(d) To replace measurements
(b) is correct
Systematic notes preserve evidence, including unexpected details, for later comparison.
14What should a learner do when an experiment produces an unexpected result?
(a) Record it and investigate possible reasons
(b) Change the result
(c) Stop asking questions
(d) Erase it
(a) is correct
Unexpected evidence can reveal errors, new variables or a better scientific question.
15Which place can be used for simple scientific investigations?
(a) Only a space station
(b) Nowhere outside school
(c) Only a research laboratory
(d) Everyday places such as a kitchen
(d) is correct
The chapter emphasises that science is everywhere and everyday events can be investigated safely.
16How does science generally develop?
(a) Ideas never change
(b) Each answer can lead to new questions
(c) All questions have final answers immediately
(d) Evidence is unnecessary
(b) is correct
Scientific knowledge evolves as new questions, observations and evidence deepen understanding.
17Classifying materials as elements, compounds and mixtures is useful because classification:
(a) Organises observations and reveals patterns
(b) Makes all materials identical
(c) Stops investigation
(d) Uses no criteria
(a) is correct
Classification helps scientists compare things and reason about shared or differing properties.
18Which statement best reflects scientific thinking about climate challenges?
(a) Observation, measurement and experiment can guide solutions
(b) Only guesses are useful
(c) Climate is unrelated to science
(d) Human actions cannot affect Earth
(a) is correct
Evidence-based investigation helps understand changes and evaluate responsible action.
19Repeating an investigation mainly helps to:
(a) Remove the need for controls
(b) Ensure every trial differs
(c) Make results more reliable
(d) Change the question each time
(c) is correct
Repeated trials show whether a pattern is consistent rather than accidental.
20A conclusion should be based primarily on:
(a) What was expected before the test
(b) The investigator's preference
(c) Recorded observations and measurements
(d) The most exciting guess
(c) is correct
Scientific conclusions must follow the evidence collected during the investigation.
What is covered in CBSE Class 8 Science Chapter 1 Exploring the Investigative World of Science?
This chapter covers all key topics from Exploring the Investigative World of Science as per CBSE 2026-27 syllabus.
Is this MCQ Test useful for CBSE board exams?
Yes, designed for CBSE Class 8 board exam preparation covering the complete syllabus.
Are these CBSE Class 8 Science MCQ Test updated for 2026-27?
Yes, all content at eBookPublisher is updated as per the latest 2026-27 CBSE syllabus.
How many chapters are in CBSE Class 8 Science?
All chapters of CBSE Class 8 Science are covered at eBookPublisher with free MCQ Test for each chapter.
Can I study Exploring the Investigative World of Science online for free?
Yes, complete MCQ Test for Exploring the Investigative World of Science is available free at eBookPublisher. Study online directly — no download needed.
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