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Apr 16, 2024 · Class 9. Chapter 1 Class 9 - Matter In Our Surroundings. Concepts. States of Matter. Last updated at April 16, 2024 by Teachoo. There are 3 States of Matter - Solids, Liquids and Gases. Solids. The particles in solids are packed tightly and are rigid. They have fixed shape and volume. Liquids.
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- Physical Nature of Matter
- Characteristics of Particles of Matter
- States of Matter
- Can Matter Change Its State?
- Evaporation
Matter is Made Up of Particles
1. When the question came about the nature of matter, there were two thoughts. 2. The first said that matter is continuous, and the second said that matter is made up of small particles. 3. At last, the second thought was proved right with the help of various experiments for example. How small are these particles? 1. If we add potassium permanganate to a solution, then its very small amount can change the colour of the whole solution, proving that it is made up of very small particles. 2. Als...
Particles of matter have spaces between them
It can be seen that one kind of matter is able to get dissolved in another kind of water, e.g., salt in water, lemonade, etc which proves that in reality, particles of one matter get into the spaces of the other.
Particles of matter are continuously moving
1. Particles of matter are proven by experiments to be continuously moving and thus they possess kinetic energy. 2. As the temperature rises, their kinetic energy also rises, and these particles start moving faster. 3. The process where a particle of one kind of matter goes into spaces between another kind of matter is known as diffusion. 4. It is observed that when heated, this process becomes faster.
Particles of matter attract each other
It has been observed that force of attraction is present between particles of matter and the strength of this force of attraction depends upon the kind of matter.
Matter exists in three different states, viz Solid, liquid and gas. These different states of matter exist due to variations in their characteristics and properties discussed above.
We can take the example of water, as we know that it exists in all 3 states i.e. 1. Solid as ice 2. Liquid as its familiar water state 3. Gas as vapour Now we need to look into reasons those are responsible for bringing out these changes in the state of matter.
A change in the state of matter can also take place without a change in temperature or pressure.The particles of matter are always in motion and have kinetic energy.In the case of liquids, the kinetic energy of the molecules at the surface is higher than that of those present inside.Surface molecules are able to break the force of attraction and are converted into their vapour form.- Irshad Anwar
Get Notes, NCERT Solutions, Worksheets, Extra Questions, MCQs (with answers) of Chapter 1 Class 9 Science - Matter in our Surroundings. This is Chapter 1 of our Class 9 NCERT book, and comes under Chemistry Class 9. In this chapter, we will learn. What is Matter; Physical Nature of Matter; Characteristics of Particles of Matter
Matter in Our Surroundings CBSE Class 9 Science Chapter 1 – Complete explanation and Notes of the chapter ‘Matter in Our Surroundings’. Topics covered in the lesson are Matter and its classification, Physical and chemical classification, Molecular theory of matter, Molecular structures and properties of solids, liquids and gases, Plasma ...
Chapter 9, Matter in our surroundings is a crucial topic in the science textbook for class 9 and serves as the foundation for many later-level concepts. With the help of determined experts with in-depth conceptual knowledge and years of experience, solutions are created.
This solution contains questions, answers, images, step by step explanations of the complete Chapter 1 titled Matter in Our Surroundings of Science taught in class 9. If you are a student of class 9 who is using NCERT Textbook to study Science, then you must come across Chapter 1 Matter in Our Surroundings. After you have studied lesson, you ...
