NCERT Class 9 Science Notes - Download Chapter-wise PDFs

NCERT Class 9 Science Notes: Chapter-wise Details

The notes are a very important resource that includes all the important topics and concepts in an easy and understandable manner, along with the required diagrams, which are required by the students for preparation in less time. Given below are the summaries of each chapter, which are included in the 9 Class Science Notes PDF, along with their topics.

Chapter 1: Matter in Our Surroundings

This chapter includes a detailed knowledge of the matter that is present all around us. Its different forms, such as solid, liquid, and gas, their characteristics, and comparison are explained very clearly and in easy language. It also highlights how these different forms of matter change their state from one form to another, like solid to liquid, liquid to gas, and vice versa, along with certain examples to make this concept stick for a longer time.

Chapter 2: Is Matter Around Us Pure?

Chapter 2 provides the concept that every matter present around is pure or not. It includes the explanations of different terminologies like mixture, colloids, suspension, and solutions, their characteristics, and the differences between them that make their features unique. Separating the components of a mixture that includes various processes such as sublimation, chromatography, distillation, etc., is explained in a very understandable manner in the 9 Class Science Notes PDF, along with the diagrams provided by our subject experts.

Chapter 3: Atoms and Molecules

It covers all the information on the structure and behaviour of atoms and molecules, which helps students to understand the chemical reactions, the composition of materials, as well as the biological processes. These notes provide a clear and detailed understanding of these fundamental topics. Concepts like the laws of chemical equations, atomic mass, molecular mass, and chemical formulas are well explained. The 9 Class Science Notes PDF also covered the steps of how to write a chemical formula correctly, along with an example.

Chapter 4: Structure of the Atom

These notes highlight the components by which an atom is formed, as proven by several scientists like Thomson, Rutherford, and Bohr's model of an atom. The features of all these experiments are provided in a very understandable manner in points, along with the required diagrams. This chapter also covers the concepts of valence electrons and how electrons revolve around the nucleus, along with the definitions of isotopes and isobars, and students can access the Class 9 Science Notes PDF free download for quick reference.

Chapter 5: The Fundamental Unit of Life

The Fundamental Unit of Life chapter introduces students to cells, the basic structural and functional units of life. It explains the discovery of the cell, the cell theory, and the different types of cells. Students also learn about various cell organelles and their functions, including the nucleus, mitochondria, endoplasmic reticulum, and Golgi apparatus, along with their diagrams from these notes prepared by our subject experts. It also covers important topics such as the plasma membrane and its functions, diffusion and osmosis, and the differences between plant and animal cells.

Chapter 6: Tissues

It highlights the difference between unicellular and multicellular organisms and why multicellular organisms require specialised tissues. Students learn about the two main types of tissues, plant tissues and animal tissues, along with their structure, functions, and types, with the help of diagrams. These 9 Class Science Notes PDF cover important topics such as meristematic and permanent tissues in plants, including parenchyma, collenchyma, and sclerenchyma, as well as epidermis and vascular tissues (xylem and phloem).

Chapter 7: Motion

Concepts like Uniform and Non-Uniform motion, their differences, along with real-life examples, are well-explained in these notes. Terms like speed, velocity, and acceleration are given with their formulas, which are required by the students to solve numerical problems in the exam. This chapter covers the first, second, and third equations of motion in a very understandable manner, provided by our subject experts. Different graphical representations of the motion, which are important from an exam point of view, are covered in these Class 9 Science Notes, which help students to grasp the concepts easily.

Chapter 8: Force and Laws of Motion

This chapter includes all the topics of force and the laws of motion. It explains important terms like force, inertia, momentum, and mass in simple words, making them easy to understand for students. Newton’s three laws of motion are described with everyday examples so students can relate them to real life by our subject experts. There are also well-detailed explanations of how to apply formulas to solve problems.

Chapter 9: Gravitation

The notes on Gravitation help students understand how objects attract each other with a force called gravity, both on Earth and in space. Important topics like the universal law of gravitation, mass, and weight are explained using simple language and examples. The concept of pressure in liquids and the role of buoyancy are also clearly discussed. Important formulas and definitions are provided to make learning easier. Students can also refer to the Class 9 Science Notes PDF free download for quick revision.

Chapter 10: Work and Energy

It covers the concept of how work is done and how energy is used and transformed in various forms in different situations. All the key terms related to work and energy, such as work, power, kinetic energy, and potential energy, are explained easily and understandably. Along with this, important formulas and their applications are covered, helping students solve numerical problems confidently. The law of conservation of energy is also explained in simple points to make the concept clear for students.

Chapter 11: Sound

The sound chapter includes the concept of how sound propagates in the atmosphere and how it reaches our ears. All the different and difficult terms related to sound, such as pitch, quality, amplitude, etc, are designed in a way that’s easy to grasp, along with diagrams for better retention. Apart from this, the structure of the human ear is well-explained in Class 9 Science Notes along with a well-labelled diagram.

Chapter 12: Improvement in Food Resources

The Improvement in Food Resources chapter focuses on the methods that improve agricultural productivity and ensure food security. It covers crop improvement, crop variety improvement, nutrient management, irrigation techniques, and different cropping patterns. The NCERT Class 9 Science Notes also include animal husbandry, which includes cattle farming, poultry farming, etc, in a clear and simple style. Understanding these concepts helps in sustainable agriculture and efficient food production.

Also, Read

• NCERT Solutions for Class 9 Maths
• NCERT Solutions for Class 9 Science

Students studying in class 9 need well-prepared notes to understand the topics quickly and make revision much easier as science becomes more detailed and interesting, introducing new concepts and ideas.

• NCERT Class 9 Science Notes make difficult topics easy, helping students understand definitions, formulas, and processes without confusion.

• Clear diagrams and real-life examples are included, making learning more visual and easier to remember.

• These notes save time by providing all important information in one place.

• Students can use them to practice important concepts regularly, which improves retention.

• NCERT Notes for Class 9 also help build a strong foundation for higher classes and competitive exams.

Also, check the NCERT Books and the NCERT Syllabus here:

• NCERT Books Class 9 Science
• NCERT Syllabus Class 9 Science
• NCERT Books Class 9
• NCERT Syllabus Class 9