Class 9
Science
Chapter 1
Exploration (latest NCERT)
Exploration: Entering the World of Secondary Science
Free NCERT practice questions for Class 9 Science, Chapter 1 — 48 questions across MCQs, short-answer, long-answer and more. Download a printable PDF worksheet in seconds. No signup, no ads, no paywall.
What this chapter covers
Class 9 Science Chapter 1 'Exploration: Entering the World of Secondary Science' from the new NCERT Exploration textbook orients students to scientific inquiry at the secondary level. The chapter introduces the scientific method, measurement and units (SI system), uncertainty in measurement, and the major branches of science. It sets up the way every later chapter will be structured: an observation, a question, a model and a test.
Key topics in this chapter
- Scientific method and inquiry
- SI units and measurement
- Uncertainty and error
- Branches of science
- Designing fair experiments
Sample questions from this chapter
Here are 6 real questions students will encounter when they generate a worksheet for this chapter. Every question includes the answer.
MCQ
Medium
1 mark
Why does science use models?
(a) To make science harder
(b) To simplify complex systems and focus on what matters
(c) To avoid measurements
(d) To replace experiments
Answer: To simplify complex systems and focus on what matters
Short Answer
Medium
3 marks
Why does science use models? Give an example.
Answer: • The natural world is too complex to study in full detail.
• A model simplifies a system, keeping only what matters for the question.
• Example: a moving car treated as a single point when studying its motion.
Fill in the Blank
Medium
1 mark
Scientific ideas are always open to __________ as new evidence appears.
Answer: improvement (revision)
Very Short
Medium
1 mark
Why does science use simplified models of the natural world?
Answer: Because the natural world is too complex to study in full detail.
True / False
Medium
1 mark
State True or False: Ignoring air resistance when studying a falling object is a deliberate modelling choice.
Answer: True.
Long Answer
Hard
5 marks
Explain what scientific models are, why they are used, and how assumptions help. Give two examples.
Answer: • A model is a simplified representation of a real system.
• The natural world is complex, so models focus only on what matters for a question.
• Making assumptions (ignoring less important details) keeps the model simple but useful.
• Example 1: a moving car represented as a single point in physics.
• Example 2: studying a falling object while ignoring air resistance.
• These choices are made on purpose, not by mistake.
Generate a worksheet with all 48 questions →
Frequently asked questions
What is included in Class 9 Science Chapter 1 (Exploration: Entering the World of Secondary Science)?
This chapter has 48 NCERT-aligned practice questions covering all the concepts from the Exploration textbook's Chapter 1. Questions span easy, medium and hard levels across 8 different formats so students get a balanced practice set.
Are these questions based on the new NCERT Exploration textbook?
Yes. Every question on Practico for Class 9 Science is mapped directly to the latest NCERT Exploration textbook (the one CBSE schools are using now). The chapter numbers and chapter titles match the textbook exactly.
How many questions can I practice from this chapter?
48 questions are available right now. You can pick how many you want at a time — generate 10 quick MCQs, a 30-question worksheet, or a full exam-style mix. Each generation gives you a different random set.
Can I download a free PDF worksheet for Exploration: Entering the World of Secondary Science?
Yes — completely free, no sign-up required. Pick this chapter, choose the number of questions and types you want, and download a printable PDF (with or without answers) in one click.
What question types are available?
This chapter has assertion reason, fill blank, long, match, mcq, short, true false, very short. You can mix any combination, or filter to just the type you want to practice — for example, only numericals to drill calculation, or only short-answer questions for exam revision.
Is Practico aligned with CBSE exam patterns?
Yes. Practico questions are tagged by marks (1, 2, 3, 5) and by difficulty (Easy/Medium/Hard) just like CBSE exam blueprints, so you can build a worksheet that mirrors a real unit test or annual exam.