Download Class 9 Chapter 9 Physics Exercise Short Questions PDF for quick revision and exam preparation. This PDF is helpful for 9th class students who want to prepare important exercise short questions according to the new syllabus. Students can use it to revise chapter-wise questions, improve their concepts, and prepare better for school tests and board exams.
Chapter 9 Short Questions: Nature of Science
These are the exercise short questions from Chapter 9 of the Class 9 Physics textbook. In this chapter you are expected to be able to state, from memory and in two or three lines:
- Physics, and the main branches into which it divides.
- What each branch studies, with a typical problem from each.
- Interdisciplinary fields such as biophysics and medical physics.
- The steps of the scientific method, in order.
- Hypothesis, theory and law, distinguished.
- Qualitative against quantitative observation.
Wording That Costs Marks in This Chapter
Short answers in Nature of Science are marked on precision rather than length. These are the specific slips that lose marks here:
- Starting the scientific method at the experiment rather than the observation.
- Calling any untested guess a hypothesis.
- Describing a colour as a quantitative observation.
Working Through the Set
Cover the answer, write your own version, then compare. Recognising a correct answer is not the same as producing one, and only writing exposes the difference. Mark yourself as strictly as an examiner would: if the unit is missing, count the mark as lost. Come back to anything you got wrong two days later rather than the same evening.
Frequently Asked Questions
What is the first step of the scientific method?
Observation. Noticing something about the natural world raises the question that the hypothesis then tries to answer, and the experiment comes only after that.
Is this PDF free and based on the new syllabus?
Yes to both. It is free with no sign-up, and it follows the current Class 9 Physics textbook, in which Nature of Science is Chapter 9 of nine.
Related Class 9 Physics Resources
For the reasoning answers from the same chapter see the Chapter 9 constructive questions, and test yourself with the Chapter 9 online test. Continue with Chapter 8, or sit a full paper from the 25 Class 9 Physics guess papers. Everything else is on the Class 9 Physics page.