CBSE Class 9 Science Revision Notes

Revision Notes for CBSE Class 9 Science

CBSE Class 9 Science Notes are available here on Vedantu to make you well-versed with each and every important topic of Class 9 Science. Class 9 is often considered the make-or-break year and CBSE Class 9 Science Notes can help you to complete the syllabus on time. As students balance the pressures of teenage with the increasing study-load, it is imperative to have detailed solutions along with them. It requires some smart work to stay ahead of the pack and Class 9 science revision notes PDF can give aspiring students the edge. So what is so special about these notes? They cover the whole range of the CBSE Syllabus and include tips and questions presented in the way they appear in exams. The science notes for class 9 free download is available in PDF because it is the most accessible format. Students can store these notes in phones and tablets and browse through important concepts even when they are on the move. They can literally study anywhere – with all the information packed in a few MBs. 


Science is a very important subject and class 9 is a crucial stage because students will be learning the fundamentals that will apply for the coming academic years which include board and competitive exams. A strong Class 9 foundation ensures good performance in the all-important class 10 exams too. This is the stage when school students need to be very clear on the difference between the different science subjects and understand the core concepts. Revision notes act as the test when students need to do a final study before their exams. They help students revise and refresh the subject learnt earlier. Apart from the free class 9 science notes, students need to be very thorough with their fundamentals – something our teacher can deliver with our online tutorship modules for the core science subjects. 


Vedantu is a platform that provides free NCERT Solutions and other study materials for students. Maths Students who are looking for better solutions ,They can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.



FAQ (Frequently Asked Questions)

Q 1: How many chapters are there in CBSE Class 9 Science?

Ans: There are a total of 15 chapters in class 9 science. The first half of the syllabus comprises of chapter 1: matters in our surroundings, chapter 2: Is matter around us pure, chapter 3: atoms and molecules, chapter 4: structure of the atoms, chapter 5: the fundamental unit of life, chapter 6: tissues and chapter 7: diversity in living organisms. 


The second part of the syllabus consists of chapter 8: motion, chapter 9: force and laws of motion, chapter 10: gravitation, chapter 11: work and energy, chapter 12: sound, chapter 13: why do we fall ill, chapter 14: natural resources and chapter 15: improvements in food resources.

Q 2: What is the propagation of sound?

Ans: Here, you will get to know how vibration in objects produces sound. On carrying off the activities, you will be gaining a basic idea of sound vibrations. In this section, you will find the theoretical explanation of sound energy, its creation and propagation. You shall also come across how the particles in a medium vibrate to propagate a sound wave through it. In fact, it shall also show that the particles resume their equilibrium once the sound waves pass through it. 


On proceeding further, sound waves produce compressions and rarefactions in a medium. These phenomena shall happen only when the sound energy disturbs the particles in a medium with the help of a diagram. On elaborating about the compression and rarefaction, you will understand by experiments that sound energy needs a medium to propagate.

Q 3: Brief about the chapter Natural Resources.

Ans: This chapter discusses why natural resources are required for life and how life is supported on the planet earth. Here, you will know a glimpse of the factors needed for life, like water, food, optimal ambient temperature, and energy from the sum. The lithosphere and hydrosphere are defined and the biosphere is explained. Components of the biosphere are discussed. Then, the chapter teaches you about the abiotic components on the earth’s crust to make you understand their roles in supporting life on earth. The chapter mainly focuses on: 

  • The breath of life: air

  • The role of the atmosphere in climate control 

  • The movements of air: winds

  • Rain

  • Air pollution

  • Water: a wonder liquid

  • Water pollution

  • Mineral riches in the soil

  • Biogeochemical cycles

  • The water cycle

  • The nitrogen cycle

  • The carbon cycle 

  • The oxygen cycle 

  • Ozone layer

Q 4: Will Vedantu helps me with the exam preparation?

Ans: At Vedantu, we aim towards simplifying the process of learning for students. That is why our solutions for NCERT books are provided in PDF format for you to download it freely without the hassle of a lengthy registration process. Further, we also provide one on one online classes with our expert teachers, who can provide students with a much more in-depth knowledge of respective subjects.  The questions cover all the important topics and subtopics of the chapter which could be expected in your Class 9 science exams. Therefore, if you are looking for a way to streamline your exam preparations, check the solutions PDF on our official website.

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