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Learn States of matter: solid, liquid, gas
Welcome to CBSE Class 9 Science! In the chapter "Matter in Our Surroundings," we explore everything around us—from the water we drink to the air we breathe. Everything in the universe that has mass and occupies space is called matter. But matter doesn't look or behave the same way everywhere. Depending on the physical properties and the arrangement of its particles, matter is broadly classified into three primary states: solid, liquid, and gas. Understanding these three states is the fundamental foundation of chemistry, helping us explain everyday phenomena like why ice melts, why water flows, and why steam expands to fill an entire room.
The key differences between the states of matter lie in the intermolecular space (the physical gap between particles) and the force of attraction holding them together. In solids, particles are tightly packed together with almost no space between them, creating strong intermolecular forces that give them a fixed shape, high density, and a definite volume. In liquids, the particles are close together but have enough space to slide past one another; this moderate force of attraction means liquids have a definite volume but take the shape of their container. Finally, in gases, particles are spaced very far apart with extremely weak forces of attraction, allowing them to move freely, randomly, and rapidly. Because of this high kinetic energy, gases possess neither a fixed shape nor a fixed volume, expanding outward to completely fill whatever closed container they are placed in.
Looking at the infographic above, you can clearly visualize the microscopic differences between the three states of matter. On the left, the solid state is depicted with tightly packed blue particles in a highly organized, rigid structure that maintains its own shape. In the center, the green particles of the liquid are slightly further apart and less organized, demonstrating their ability to freely flow and adopt the shape of the lower portion of their container. On the right, the red gas particles are entirely separated, rapidly bouncing around the sealed container, as indicated by the dashed movement lines. Notice the red lid on the gas container—this represents the fact that gases will escape into the atmosphere if not confined! In your CBSE Class 9 exams, you will frequently be asked to draw these particle arrangements or provide reasoning-based answers, such as why a wooden table is a solid (extremely high intermolecular force) or why the smell of hot food reaches you from several meters away (high kinetic energy of gas particles diffusing quickly through the air).
Are you finding the concepts in "Matter in Our Surroundings" a bit tricky to memorize and apply? Don't worry—mastering science becomes so much easier with the right guidance! If you want to strengthen your understanding of atoms, particles, physical properties, and the states of matter, consider connecting with expert tutors on UrbanPro. Whether you are looking for highly personalized online sessions or structured local offline tuition near your home, UrbanPro is India's most trusted platform to find highly rated CBSE Class 9 Science tutors. An experienced tutor can help make learning interactive, simplify complex chemistry concepts, and prepare you thoroughly for your school exams. Start your learning journey today with UrbanPro and ace your Science exams with ultimate confidence!
Other Concepts in Matter in Our Surroundings
- Physical nature and states of matter
- Characteristics of particles of matter
- Evaporation and its factors
- Interconversion of states of matter
- Effect of temperature and pressure
Other Concept Videos for States of matter: solid, liquid, gas
Solid, Liquid, Gas: The Matter Trio
CBSE - Class 9>Science>Matter in Our Surroundings>States of matter: solid, liquid, gas
Top Tutors who teach States of matter: solid, liquid, gas
Super Tutor 
Lalpur, Ranchi 
14 students 
2214 hrs of classes completed 
500 per hour 
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Student's Home 
Tutor's home Teaching since last 20 years
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Super Tutor Sector 5, Dwarka, Delhi 33 students 1162 hrs of classes completed 500 per hour Online Classes I teach Math and Science to 8th-12th standard students and have been teaching for more than 10 years. Batch of 2 Students: I conduct these small batches with a pair of students of the same class and the education board (I cover all popular boards CBSE, ICSE, IGCSE etc.). Works for those students/parents who are looking for individual attention for their kids but still want it to be a little affordable. *3 classes per week (So 12 a month) *Maths and Science (Also English Grammar and Literature) *Fee Rs. 4500/- per month/12 classes. Batch of 6 Students: I conduct these small batches with 5-6 students of the same class and the education board (I cover all popular boards CBSE, ICSE, IGCSE etc.). *4 classes per week (So 16 a month) *Maths and Science *Fee Rs. 4000/- per month/16 classes. I will start the classes immediately once the first kid enrolls. ------------------------------------------------------------------------------- Individual/Private/One-to-One classes: I conduct these one to one classes for those students willing to have one to one setup (I cover all popular boards CBSE, ICSE, IGCSE etc.). *3 classes per week (So 12 a month) *Maths and Science (Also English Grammar and Literature) *Fee Rs. 7000/- per month/12 classes. ------------------------------------------------------------------------------- I took classes and batches in different institutions.
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FAQ
What is the meaning of States of matter: solid, liquid, gas?
It is a fundamental principle in Matter in Our Surroundings that explains the nature and characteristics of States of matter: solid, liquid, gas.
Why is States of matter: solid, liquid, gas important for CBSE - Class 9 exams?
This concept is crucial for the exams as questions related to Matter in Our Surroundings and specifically States of matter: solid, liquid, gas are very common. It helps secure marks in the section effectively.
Is States of matter: solid, liquid, gas part of the latest NCERT syllabus?
Yes, States of matter: solid, liquid, gas is an integral part of the CBSE - Class 9 NCERT Science syllabus. It is a key topic covered in the Matter in Our Surroundings chapter.
What are common mistakes students make with States of matter: solid, liquid, gas?
Students often miss the minute details or fundamental definitions of States of matter: solid, liquid, gas. Regular revision and practice are needed to master the nuances.
How should I approach learning States of matter: solid, liquid, gas?
Read the NCERT text thoroughly to grasp the theory. Create summary notes and flowcharts to retain the key points of States of matter: solid, liquid, gas.
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