Class 8 Science — Chapter 1: Exploring the Investigative World of Science
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise the most important Class 8 Science questions from Chapter 1, "Exploring the Investigative World of Science" — 72 NCERT-aligned multiple-choice questions with answers and explanations. The set is split into 24 Easy, 24 Medium and 24 Hard, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams.
"Exploring the Investigative World of Science" is one of the chapters where concept clarity across physics, chemistry and biology basics really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+4 correct, −1 wrong, 0 skipped), training the same negative-marking accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Exploring the Investigative World of Science, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 8 Science mastery score. A sample question is shown below; sign in free to see its answer and practise all 72.
Key concepts: Exploring the Investigative World of Science (Class 8 Science)
This opening chapter is about how science actually works — systematic investigation. Science starts with curiosity and careful observation, turning everyday wonders (like why a puri puffs up) into focused, testable questions. You learn to plan an experiment by deciding what to change and what to observe, to run a fair test by changing only one thing at a time, to record both qualitative (yes/no) and quantitative (measured) observations, and to draw conclusions from the evidence — while remembering that science is always evolving as new questions arise.
- Systematic investigation
- A careful, step-by-step way of answering a question: observe, ask a testable question, experiment, record, and explain — the heart of how science works.
- Careful observation
- Using the senses to notice details of what actually happens; good observation is the solid ground on which investigation is built.
- Scientific question
- A focused, testable question such as 'what happens to a puri if the oil is hotter?' that can be explored by observation or experiment.
- Hypothesis
- A possible explanation put forward to be tested by an experiment; if the evidence disagrees, the hypothesis is revised or rejected.
Try a sample question
One free sample from this chapter — sign in to check your answer and practise the rest.
A sensible order for a simple investigation is:
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See the answer and solution to this question, then practise all 72 questions (24 Easy · 24 Medium · 24 Hard) with timed scoring and instant feedback, plus the complete key-concept notes, formulas & exam tips. Sign in with Google — no card needed.
Start this chapter free →Exploring the Investigative World of Science — FAQs
What are the key concepts in Class 8 Science Exploring the Investigative World of Science?+
This opening chapter is about how science actually works — systematic investigation. Science starts with curiosity and careful observation, turning everyday wonders (like why a puri puffs up) into focused, testable questions. You learn to plan an experiment by deciding what to change and what to observe, to run a fair test by changing only one thing at a time, to record both qualitative (yes/no) and quantitative (measured) observations, and to draw conclusions from the evidence — while remembering that science is always evolving as new questions arise. Key ideas include Systematic investigation, Careful observation, Scientific question, Hypothesis.
What does Class 8 Science Chapter 1 (Exploring the Investigative World of Science) cover on XamBaaz?+
It covers 72 NCERT-aligned MCQs on "Exploring the Investigative World of Science" — 24 Easy, 24 Medium and 24 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams.
Are these "Exploring the Investigative World of Science" questions free to practise?+
Yes — sign in with Google to practise "Exploring the Investigative World of Science" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Exploring the Investigative World of Science" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Are these "Exploring the Investigative World of Science" MCQs available with answers?+
Yes. This page shows one sample question so you can see the format; sign in free with Google to reveal the correct option and a step-by-step "Why" explanation for it, then practise all 72 questions with instant scoring.
Is there negative marking in the "Exploring the Investigative World of Science" quizzes?+
Yes — the timed quizzes use exam-grade marking: +4 for a correct answer, −1 for a wrong one and 0 for a skipped question, so you practise the same negative-marking discipline as CBSE Board exams.
Are these important questions for Exploring the Investigative World of Science?+
The set is curated to the NCERT syllabus and weighted toward the question patterns that actually appear in CBSE Board exams, across Easy, Medium and Hard — so it doubles as an "important questions" revision list for "Exploring the Investigative World of Science".