Class 9 Archives - CBSE Class Notes Online

What Are Elements, Compounds, and Mixtures? Key Differences and Examples

May 14, 2025May 14, 2025 - by Jaishree Gorane - Leave a Comment

Matter is the substance that forms everything around us. It can be classified into elements, compounds, and mixtures. Elements contain only one type of atom, compounds are chemically bonded atoms in fixed ratios and mixtures are physical combinations of substances. These forms are fundamental in chemistry, as it reveals how substances interact.

Chapter 1 - Matter In Our Surroundings / Class 9 / Science

What are the Characteristics of the Particles of Matter ?

April 16, 2025April 16, 2025 - by Jaishree Gorane - Leave a Comment

Particles of matter are extremely small, constantly in motion and have spaces between them. They possess mass, attract each other and can diffuse naturally. These fundamental characteristics explain how solids, liquids and gases behave differently. Understanding these properties is essential in physics and chemistry for grasping the nature and structure of all matter.

Properties of Matter: Physical, Chemical, and Functional Explained With Examples

April 14, 2025April 16, 2025 - by Jaishree Gorane - Leave a Comment

Matter, which occupies space and has mass, exhibits both physical and chemical properties. Physical traits like density or color may be extensive or intensive, while chemical traits involve transformations, such as flammability or reactivity. Matter exists in distinct states -solid, liquid, gas, plasma, and Bose-Einstein condensate each with unique behaviors. Specialized properties aid in scientific and industrial applications.

Is Matter Around Us Pure / Science Facts

Solute, Solvent and Solution- Definition, Difference between, Characteristics, Examples

April 10, 2025April 16, 2025 - by Jaishree Gorane - Leave a Comment

A solution is a homogeneous mixture of solute and solvent. Solutes dissolve in solvents without settling, forming a single-phase system. Solvents determine the solution’s state and aid dispersion. Solubility depends on factors like temperature, pressure, and polarity. Types of solutions and solvents vary by state and composition. Examples include saltwater, soda, alloys, and perfumes.

Class 9 / Is Matter Around Us Pure / Notes / Science

Chapter 2: Is Matter Around Us Pure?-Class 9 – Simplified notes

April 5, 2025May 14, 2025 - by Jaishree Gorane - Leave a Comment

Matter around us is mostly mixtures, not pure substances. Mixtures can be homogeneous or heterogeneous. Solutions, suspensions, and colloids differ in properties. Pure substances include elements and compounds, with fixed composition and characteristics. Physical and chemical changes alter matter differently. Separation methods help isolate components in mixtures, highlighting the difference between mixtures and pure substances.

Chapter 1 - Matter In Our Surroundings / Class 9 / Science Facts

Sublimation- How Solids Turn Into Gas Without Melting

March 12, 2025March 12, 2025 - by Jaishree Gorane - Leave a Comment

Sublimation is when a solid turns straight into gas without melting into liquid. This happens with things like dry ice, mothballs, and even snow in cold places. It’s used in printing, food drying, and space science. Learn how it works and where you see it in daily life!

NCERT Exemplar Solutions- Class 9 Science Chapter – 1 – Matter in Our Surroundings

March 9, 2025April 16, 2025 - by Jaishree Gorane - 1 Comment

Get NCERT Exemplar Solutions for Class 9 Science Chapter 1 – Matter in Our Surroundings, covering multiple-choice, short-answer, and long-answer questions with detailed explanations. Learn about diffusion, evaporation, intermolecular forces, and phase transitions with clear, step-by-step solutions. Ideal for CBSE students aiming for conceptual clarity and exam preparation.

NCERT Solutions for Class 9 Science Chapter 1- Matter In Our Surroundings

March 8, 2025March 12, 2025 - by Jaishree Gorane - Leave a Comment

NCERT Solutions for Class 9 Science Chapter 1 – Matter in Our Surroundings covers all textbook questions with step-by-step answers. Understand key concepts like states of matter, diffusion, density, and phase changes through detailed explanations, reasoning-based solutions, and real-life examples, making science easier for students.

Chapter 1 - Matter In Our Surroundings / Class 9 / Science / Science Facts

The Science of Evaporation – Process, Factors, and Applications

March 5, 2025 - by Jaishree Gorane - Leave a Comment

Evaporation is a natural process where a liquid turns into gas at temperatures below its boiling point. This article breaks down the science behind evaporation, the factors that influence it-like heat, wind and humidity and how it plays a crucial role in cooling, weather cycles, and daily life.

Why is the Latent Heat of Steam So High? Find the Answer

March 1, 2025March 1, 2025 - by Jaishree Gorane - Leave a Comment

Latent heat of steam is the energy required to convert water into steam without a temperature change. Water’s strong hydrogen bonds make its latent heat exceptionally high, requiring 2260 kJ/kg at 100°C. This property is essential in power plants, cooking, industries, and weather systems, making steam an efficient heat carrier in various applications.