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Chapter 1 – Number System
Welcome to Chapter 1 Number System at AnnA Classes. This chapter is the foundation of Class 9 Maths and one of the most important chapters for your CBSE board exam. We have broken this chapter into 10 carefully structured lessons so that you learn every concept step by step — from the basics of number types all the way to laws of exponents, rationalisation and full exam practice. Here is everything you will learn in this chapter:
This course covers all 12 chapters of the NCERT Class 9 Maths syllabus
with structured, easy-to-understand study material designed for every
type of learner whether you are just starting out or preparing for
your board exams.
What you will get in this course:
- Chapter-wise Concept Notes and Theory
- Solved Examples with step-by-step explanation
- Practice MCQs (Easy, Medium and Hard)
- Assertion-Reason Questions
- Short and Long Answer Questions
- Formula Sheets for quick revision
- Mind Maps for visual learners
- CBSE Previous Year Questions (2017–2024)
- Chapter Test and Mock Papers
This course strictly follows the NCERT textbook and CBSE exam pattern.
All content is aligned with the latest CBSE 2025-26 syllabus.
Whether you want to score full marks in your school exams or build a
strong foundation for competitive exams like JEE and NTSE — this
course has everything you need.
Start learning today with AnnA Classes.
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Ch 2 Is Matter Around Us Pure? | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Not everything around us is what it seems! This chapter dives into mixtures and pure substances, the difference between elements and compounds, and separation techniques like evaporation, filtration, distillation, and chromatography. A concept-first approach with NCERT solutions and CBSE exam-pattern questions.
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Ch 3 Atoms and Molecules | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Go beyond the visible and explore the building blocks of matter! This chapter covers the laws of chemical combination, Dalton's atomic theory, atomic and molecular masses, the mole concept, and chemical formula writing. Step-by-step solved numericals and NCERT exercise solutions included.
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Ch 4 Structure of the Atom | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Unlock the mysteries inside an atom! Students learn about electrons, protons, and neutrons, and explore atomic models by Thomson, Rutherford, and Bohr. The chapter also covers valency, atomic number, mass number, and isotopes. Clear diagrams, solved examples, and CBSE-pattern questions make this chapter easy to master.
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Ch 5 The Fundamental Unit of Life | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Every living thing is made of cells learn everything about them here! This chapter covers the discovery of the cell, cell theory, plant vs animal cells, cell organelles like the nucleus, mitochondria, and chloroplast, and the functions of each. Diagram-based explanations and NCERT solutions included.
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Ch 6 Tissues | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
From skin to muscles to wood it's all about tissues! This chapter explains plant tissues (meristematic and permanent) and animal tissues (epithelial, connective, muscular, and nervous) with detailed diagrams and functions. Fully solved NCERT exercises and CBSE exam-focused practice included.
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Ch 7 Diversity in Living Organisms | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Life on Earth is incredibly diverse this chapter helps you make sense of it all! Students learn the basis of classification, the five-kingdom system, and the major groups of plants and animals. Includes the hierarchy from Kingdom to Species, with clear examples, diagrams, and NCERT solutions.
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Ch 8 Motion | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Covers types of quadrilaterals, angle sum property, properties of parallelograms, and the mid-point theorem. Learn how to prove and apply quadrilateral properties. Includes practice questions with full solutions.
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Ch 9 Force and Laws of Motion | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Understand the forces that govern everything around you! This chapter covers Newton's three laws of motion, inertia, momentum, and the law of conservation of momentum. Real-life examples, step-by-step numericals, and fully solved NCERT exercises help students build strong conceptual and problem-solving skills.
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Ch 10 Gravitation | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Why do objects fall? Why does the moon orbit the Earth? This chapter answers it all! Students learn Newton's universal law of gravitation, the concept of g, mass vs weight, thrust, pressure, and Archimedes' principle with buoyancy. Includes solved numericals and CBSE exam-pattern questions.
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Ch 11 Work and Energy | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Science defines work differently than everyday life find out how! This chapter covers the scientific definition of work, kinetic and potential energy, the law of conservation of energy, and power. All concepts are explained with real-life examples and step-by-step solved numericals aligned to NCERT CBSE 2026-27.
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Ch 12 Sound | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Explore the science behind everything you hear! This chapter covers the production and propagation of sound, wave characteristics like frequency, amplitude, and speed, the human ear, reflection of sound, echo, reverberation, and the range of hearing. Numericals, NCERT solutions, and CBSE exam questions all included.
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Ch 13 Why Do We Fall Ill? | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
: Health is more than just not being sick learn the science of disease! This chapter explains the difference between health and disease, types of diseases (infectious and non-infectious), causes, means of spread, and prevention. Includes a detailed look at pathogens like bacteria, viruses, fungi, and how our immune system responds.
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Ch 14 Natural Resources | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
Earth provides everything we need but for how long? This chapter covers air, water, and soil as natural resources, the biogeochemical cycles (water, nitrogen, carbon, oxygen), the greenhouse effect, ozone layer depletion, and the importance of conservation. Concept-based explanations with NCERT solutions and exam-ready notes.
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Ch 15 Improvement in Food Resources | Class 9 Science NCERT CBSE 2026-27 | AnnA Classes
How does food reach your plate? This chapter explores crop improvement, crop production and management, storage, animal husbandry, poultry, fish, and bee farming. Students learn about manures, fertilisers, irrigation methods, and modern agricultural practices as per NCERT CBSE 2026-27 with fully solved exercise questions.
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Go beyond the visible and explore the building blocks of matter! This chapter covers the laws of chemical combination, Dalton’s atomic theory, atomic and molecular masses, the mole concept, and chemical formula writing. Step-by-step solved numericals and NCERT exercise solutions included.
📥 Download the full notes from the exercise file Above