The following 20 Multiple Choice Questions (MCQ) are based on
Chapter 1: The Ever-Evolving World of Science from the NCERT Class 7
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
1Science is best described as:
(a) An ongoing process of questioning and discovery
(b) A fixed list of facts
(c) A subject limited to laboratories
(d) A method of avoiding uncertainty
(a) is correct
Science develops through curiosity, observation, experiments and evidence.
2What makes learning in science 'take flight' according to the chapter?
(a) Memorisation alone
(b) Avoiding questions
(c) Accepting every claim
(d) Curiosity
(d) is correct
The butterfly and paper plane imagery links learning with curiosity and exploration.
3Why did early inventors study bird wings?
(a) To make electric cells
(b) To measure soil acidity
(c) To explore ideas about flight
(d) To classify acids
(c) is correct
Simple observations of birds inspired questions and experiments about flying.
4Scientific exploration involves:
(a) Staying only inside the textbook
(b) Asking how and why events occur
(c) Learning only final answers
(d) Ignoring patterns
(b) is correct
Deeper scientific questions investigate mechanisms, causes and patterns.
5Why are activities and experiments important?
(a) They connect ideas with real-world evidence
(b) They remove the need for thinking
(c) They guarantee every prediction
(d) They make questions unnecessary
(a) is correct
Hands-on experiences help test ideas and build understanding.
6Scientific knowledge is called ever-evolving because:
(a) Facts change without evidence
(b) No experiment can be repeated
(c) Questions have no value
(d) New evidence can improve understanding
(d) is correct
Science remains open to new observations, explanations and questions.
7Which attitude is most scientific when a result differs from a prediction?
(a) Change the observation
(b) Reject all experiments
(c) Investigate the result and ask further questions
(d) Hide the result
(c) is correct
Unexpected evidence can lead to better questions and explanations.
8The different fields of science are:
(a) Limited to one topic each
(b) Interconnected
(c) Completely independent
(d) Unrelated to society
(b) is correct
Ideas from physics, chemistry, biology and earth science often support one another.
9Science also involves responsibility because:
(a) Human actions affect nature and society
(b) Experiments never affect anyone
(c) Sustainability is unrelated to science
(d) Evidence has no social use
(a) is correct
Scientific understanding can guide choices about environmental and social challenges.
10Which is a useful scientific question?
(a) Is ice attractive?
(b) Which answer should I memorise?
(c) Why avoid measurements?
(d) How does heating affect the rate of melting?
(d) is correct
It identifies a change that can be observed and compared.
11What can patterns in nature help scientists do?
(a) Make every event random
(b) Replace evidence with belief
(c) Develop explanations and predictions
(d) Avoid observation
(c) is correct
Repeated patterns suggest relationships that can be tested.
12Which activity reflects 'Question the Answer'?
(a) Changing every answer to 42
(b) Creating different questions that could lead to a given answer
(c) Copying the answer repeatedly
(d) Avoiding imagination
(b) is correct
The activity develops curiosity by reversing the usual question-answer process.
13Why are creative questions valuable in science?
(a) They can open new paths for investigation
(b) They are automatically true
(c) They replace experiments
(d) They must have obvious answers
(a) is correct
Novel questions help reveal connections and possibilities worth testing.
14Water evaporating from seas and later falling as rain illustrates:
(a) A permanent loss of water
(b) Only a chemical reaction
(c) No role of solar heat
(d) Interconnected natural processes
(d) is correct
Solar heating, evaporation, clouds and rain are linked parts of the water cycle.
15Ancient timekeeping using shadows depended mainly on:
(a) Acid-base indicators
(b) Metal corrosion
(c) The changing apparent position of the Sun
(d) Electric batteries
(c) is correct
The direction and length of shadows change predictably during the day.
16Day and night are caused by:
(a) Cloud movement
(b) Earth's rotation
(c) Moon phases
(d) Earth's revolution alone
(b) is correct
As Earth rotates, different regions face toward or away from the Sun.
17An eclipse involves:
(a) Shadows cast by Earth or Moon
(b) The Sun turning off
(c) Only weather clouds
(d) A change in the Moon's shape
(a) is correct
Alignment of the Sun, Earth and Moon can place one body in another's shadow.
18Which practice supports reliable science?
(a) Selecting only expected results
(b) Never recording data
(c) Avoiding comparison
(d) Careful observation and repeatable testing
(d) is correct
Evidence becomes more trustworthy when methods and observations are clear and repeatable.
19A sustainable solution aims to:
(a) Ignore future effects
(b) Separate society from nature
(c) Meet needs while protecting resources and ecosystems
(d) Use resources without limit
(c) is correct
Sustainability considers long-term environmental and human well-being.
20The chapter encourages every student to become:
(a) An observer who avoids experiments
(b) An explorer who asks and investigates
(c) A passive memoriser
(d) Someone who never questions
(b) is correct
Curiosity invites learners to make small discoveries for themselves.
