Before going into MCQ questions of Class 9th Chapter 1, Lets have a look at some of the important points covered in the chapter. These points will help students to do a quick revision of the chapter and will also help in solving the questions.
- Science begins with curiosity, observation, and questioning.
- Scientific models simplify complex real-world systems.
- Models include important details and ignore unnecessary ones.
- Science uses precise terms, symbols, and units.
- Mathematics helps explain scientific relationships clearly.
- SI units ensure consistent measurements worldwide.
- Laws describe patterns; theories explain those patterns.
- Theories are evidence-based, not guesses.
- Science uses models and theories to predict outcomes.
- Predictions must be based on evidence and data.
- Scientific ideas change when new evidence appears.
- Estimation helps check whether answers are reasonable.
- Real-world problems require multiple science disciplines.
- Science develops through curiosity, testing, and collaboration.
- Scientific thinking helps evaluate information critically.
25 MCQ Questions for Class 9 Science: Chapter 1 Exploration: Entering the World of Secondary Science
Question 1. Science begins with which quality?
a) Memorisation
b) Curiosity
c) Calculation
d) Competition
Answer:
b) Curiosity — Starting point of scientific exploration.
Question 2. A magnifying glass represents?
a) Measurement
b) Exploration
c) Careful observation
d) Direction
Answer:
c) Careful observation — Notice patterns and details.
Question 3. The compass symbolises?
a) Observation
b) Direction in exploration
c) Gravity
d) Prediction
Answer:
b) Direction in exploration — Guides scientific thinking.
Question 4. Why are models used in science?
a) Decorate explanations
b) Simplify complex systems
c) Replace experiments
d) Avoid measurements
Answer:
b) Simplify complex systems — Focus on essentials.
Question 5. A moving car may be modelled as?
a) Sphere
b) Cube
c) Point
d) Circle
Answer:
c) Point — Motion studies need fewer details.
Question 6. Scientific models deliberately ignore?
a) Important factors
b) Useful data
c) Some details
d) Observations
Answer:
c) Some details — Keeps model manageable.
Question 7. In cricket-shot modelling, most important factor?
a) Ball colour
b) Bat brand
c) Ball speed
d) Grass amount
Answer:
c) Ball speed — Determines ball trajectory.
Question 8. Scientific terms have meanings that are?
a) Flexible
b) Personal
c) Precise
d) Regional
Answer:
c) Precise — Avoids misunderstanding globally.
Question 9. Symbol for velocity is?
a) m
b) F
c) I
d) v
Answer:
d) v — Standard scientific notation.
Question 10. Mathematics in science is mainly a?
a) Hurdle
b) Language
c) Subject
d) Formula book
Answer:
b) Language — Expresses relationships clearly.
Question 11. SI units help to?
a) Increase complexity
b) Avoid comparison
c) Standardise measurements
d) Replace experiments
Answer:
c) Standardise measurements — Same meaning everywhere.
Question 12. Aircraft fuel incident occurred due to?
a) Weather
b) Engine failure
c) Unit mix-up
d) Pilot error
Answer:
c) Unit mix-up — Pounds confused with kilograms.
Question 13. Symbol c for light speed comes from?
a) Celsius
b) Current
c) Celeritas
d) Centimetre
Answer:
c) Celeritas — Latin word for speed.
Question 14. A scientific law describes?
a) Pattern in nature
b) Personal opinion
c) Random event
d) Future technology
Answer:
a) Pattern in nature — Regular observed behaviour.
Question 15. A scientific theory explains?
a) Who discovered it
b) Why patterns occur
c) Measurement units
d) Laboratory rules
Answer:
b) Why patterns occur — Evidence-based explanation.
Question 16. A scientific theory is?
a) Mere guess
b) Untested idea
c) Well-tested explanation
d) Scientific law
Answer:
c) Well-tested explanation — Supported by evidence.
Question 17. Principle of conservation of energy is a?
a) Model
b) Principle
c) Unit
d) Symbol
Answer:
b) Principle — Broad guiding idea.
Question 18. Science can make predictions using?
a) Evidence only
b) Laws and theories
c) Beliefs
d) Luck
Answer:
b) Laws and theories — Built from evidence.
Question 19. Scientific predictions are based on?
a) Guesswork
b) Superstition
c) Evidence and reasoning
d) Assumptions only
Answer:
c) Evidence and reasoning — Measurable support required.
Question 20. When predictions fail, scientists?
a) Ignore results
b) Change evidence
c) Re-examine ideas
d) Stop experimenting
Answer:
c) Re-examine ideas — Science self-corrects.
Question 21. Weather forecasts may fail because?
a) No measurements
b) Many changing factors
c) Wrong units only
d) Lack of models
Answer:
b) Many changing factors — Tiny changes grow.
Question 22. An eclipse is mainly a?
a) Chemical reaction
b) Biological change
c) Play of shadows
d) Heat source
Answer:
c) Play of shadows — No food changes.
Question 23. Approximate estimation helps to?
a) Memorise facts
b) Check reasonableness
c) Avoid thinking
d) Replace experiments
Answer:
b) Check reasonableness — Detect obvious errors.
Question 24. Approximate breaths per day are?
a) 2,000
b) 5,000
c) 20,000
d) 50,000
Answer:
c) 20,000 — Based on resting rate.
Question 25. Real-world problems often require?
a) One science branch
b) Mathematics only
c) Multiple disciplines
d) Biology only
Answer:
c) Multiple disciplines — Real problems cross boundaries.
10 True and False Questions for Chapter 1 Exploration: Entering the World of Secondary Science
Question 1. Scientific models include every detail of a real system. (True/False)
Answer:
False
Question 2. Ignoring some details can make a scientific model useful. (True/False)
Answer:
True
Question 3. The scientific meaning of a word may differ from everyday usage. (True/False)
Answer:
True
Question 4. Mathematics in science is only used for calculations. (True/False)
Answer:
False
Question 5. SI units help scientists compare results worldwide. (True/False)
Answer:
True
Question 6. A scientific theory is simply an untested guess. (True/False)
Answer:
False
Question 7. Scientific predictions are based on evidence and reasoning. (True/False)
Answer:
True
Question 8. Scientific theories never change once accepted. (True/False)
Answer:
False
Question 9. Estimation helps determine whether an answer is reasonable. (True/False)
Answer:
True
Question 10. Real-world problems often require knowledge from multiple branches of science. (True/False)
Answer:
True
10 Fill in the Blanks Questions for Chapter 1 Exploration: Entering the World of Secondary Science
Question 1. Science uses __________ to simplify complex real-world systems.
Answer:
Models
Question 2. The magnifying glass symbolises careful __________.
Answer:
Observation
Question 3. The compass represents direction in scientific __________.
Answer:
Exploration
Question 4. The symbol used for velocity is __________.
Answer:
v
Question 5. Science uses __________ as a language to express relationships clearly.
Answer:
Mathematics
Question 6. A scientific __________ describes a regular pattern observed in nature.
Answer:
Law
Question 7. A scientific theory explains __________ certain patterns occur.
Answer:
Why
Question 8. Scientific predictions are based on evidence and __________.
Answer:
Reasoning
Question 9. A resting person takes about 20,000 __________ each day.
Answer:
Breaths
Question 10. Real-world problems often require multiple scientific __________.
Answer:
Disciplines
Question on Match the Columns
Unmatched Columns – Questions
| Column A | Column B |
|---|---|
| (i) Magnifying Glass | (a) Explains why patterns occur |
| (ii) Scientific Theory | (b) Same meaning worldwide |
| (iii) SI Units | (c) Careful observation |
| (iv) Scientific Law | (d) Regular pattern in nature |
| (v) Mathematics in Science | (e) Language of relationships |
| (vi) Scientific Prediction | (f) Based on evidence |
Matched Columns – Answer
| Column A | Column B |
|---|---|
| (i) Magnifying Glass | (c) Careful observation |
| (ii) Scientific Theory | (a) Explains why patterns occur |
| (iii) SI Units | (b) Same meaning worldwide |
| (iv) Scientific Law | (d) Regular pattern in nature |
| (v) Mathematics in Science | (e) Language of relationships |
| (vi) Scientific Prediction | (f) Based on evidence |
