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admission open for JEE, NEET & Class 9 - 12 admission open for JEE, NEET & Class 9 - 12

Matter in Our Surroundings is the first chapter of Class 9 Science and introduces students to the basic concept of matter. Everything around us occupies space and has mass, and therefore is considered matter. This chapter explains the properties of matter and the different states in which it exists.

What is Matter?

Matter is anything that has mass and occupies space. The air we breathe, water we drink, and objects around us are all examples of matter.

Properties of Particles of Matter

Particles of matter have certain characteristics:

  • They have spaces between them.
  • They are continuously moving.
  • They attract each other.

These properties help explain the behavior of different substances.

States of Matter

Matter exists mainly in three states:

Solid

Solids have a fixed shape and fixed volume. Their particles are closely packed together.

Liquid

Liquids have a fixed volume but no fixed shape. They take the shape of the container in which they are kept.

Gas

Gases have neither a fixed shape nor a fixed volume. Their particles move freely and spread rapidly.

Chapter 1 – Matter in Our Surroundings
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Change of State

Matter can change from one state to another by changing temperature or pressure. Processes such as melting, freezing, boiling, condensation, and sublimation are examples of state changes.

Evaporation

Evaporation is the process by which a liquid changes into vapour at any temperature below its boiling point. It plays an important role in cooling and various natural processes.

Importance of the Chapter

This chapter helps students understand the nature of matter and the behavior of its particles. It forms the foundation for many advanced topics in Physics and Chemistry.

CBSE Exam Preparation Tips

Focus on the properties of particles of matter, states of matter, change of state, and evaporation. Regular revision of NCERT concepts, activities, and examples will help improve conceptual understanding and examination performance.

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Master Class 9 Maths with Easy NCERT Solutions Ganita Manjari
admission open for JEE, NEET & Class 9 - 12