CBSE Class Notes Online – Classnotes123
CBSE Class Notes, Worksheets, Question Answers, Diagrams , Definitions , Diffrence between , Maths Concepts, Science Facts Online – Classnotes123
Access complete study material for Class 9 Science Chapter 1: Matter in Our Surroundings, as per the latest NCERT syllabus. The content includes detailed notes, concept explanations, solved and unsolved worksheets, MCQs, assertion-reason questions, case-based questions, and structured Q&A for thorough understanding and revision.
The chapter introduces the concept of matter and its physical nature. It explains the particulate nature of matter, including properties like particle size, movement, spacing, and forces of attraction. The chapter details the three physical states—solid, liquid, and gas—and how matter can change states with variations in temperature and pressure. Key processes such as sublimation, evaporation, condensation, and diffusion are discussed along with the concepts of latent heat and the effect of surface area, wind, and humidity on evaporation.
Concept notes and topic-wise summaries
Solved and unsolved worksheets
Multiple Choice Questions (MCQs)
Short and long answer questions
Assertion-reason and case-based questions
Key definitions, formulas, and temperature conversions
Activity-based learning references from the NCERT book
Ideal for CBSE Class 9 students, teachers creating assignments, and parents assisting in exam preparation.
Study sublimation by heating camphor. Observe how a solid changes directly to a gas without becoming liquid, and notice the crystalline deposits on cooling.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.13: Sublimation Experiment with Camphor Read MoreIdentify solids, liquids, and gases in your surroundings. Observe their properties, like fixed shape and volume in solids, fluidity in liquids, and compressibility in gases.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.11: Observing States of Matter in Daily Life Scenarios Read MoreObserve how liquids flow and maintain a fixed volume by pouring them into different-shaped containers like glasses or bowls.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.10: Investigating the Fluidity and Volume Retention of Liquids Read MoreInvestigate solids’ properties like definite shape, fixed volume, and incompressibility using everyday objects like a book or pen.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.9: Investigating the Properties of Solids Like Definite Shape and Incompressibility Read MoreObserve surface tension by gently pressing water with your fingers. Learn how cohesive forces create a thin “film” on water’s surface.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.8: Testing the Surface Tension of Water Using Fingers Read MoreTest the strength of solids like an iron nail, chalk, and rubber band. Learn how bond strength affects their properties.
Class 9 Science- Chapter 1- Matter In Our Surroundings -Activity 1.7: Testing the Strength of Bonds in Different Solids Read MoreUse human chains to model the forces of attraction in solids, liquids, and gases. Observe which bonds are strongest and weakest.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.6: Modeling Forces Between Particles Using Human Chains Read MoreCompare how potassium permanganate or copper sulfate dissolves in hot and cold water. Learn how temperature affects diffusion rates.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.5: Comparing Diffusion Rates of Potassium Permanganate or Copper Sulfate in Hot and Cold Water Read MoreUse ink and honey to observe how particles diffuse and intermix in water. See how ink spreads quickly, while honey dissolves more slowly.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.4: Adding Ink and Honey to Water to Observe Diffusion and Intermixing Read MoreSee how particles move and mix on their own in liquids. Use tea or lemonade preparation to understand diffusion and how particles spread evenly.
Class 9 Science- Chapter 1- Matter In Our Surroundings – Activity 1.2: Observing Diffusion in Liquids (e.g., Making Tea, Lemonade) Read More