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Old December 6th, 2012, 11:10 AM
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I need the Central Board of Secondary Education notes for class 9th and also please give me the sample papers please tell me how I search it and get more information about it and tell me from which website I can get information about it easily and also tell me about its official website please.

As you want to get the notes of Science subject of 9th class of Central Board of Secondary Education so here is the information of the same for you:

Some content of the file has been given here:

Introduction
Everything in this universe is made up of material which scientists have named matter. The air we breathe, the food we eat, stones, clouds, stars, plants and animals, even a small drop of water or a particle of sand each thing is matter.
Early Indian philosophers classified matter in the form of five basic elements air, earth, fire, sky and water.
Modern day scientists have evolved two types of classification of matter based on their physical properties and chemical nature.

Characteristics of Particles of Matter
1. PARTICLES OF MATTER HAVE SPACE BETWEEN THEM- when we make tea, coffee or lemonade (nimbu paani ), particles of one type of matter get into the spaces between particles of the other. This shows that there is enough space between particles of matter. Similarly particles of sugar, salt, Dettol, or potassium permanganate get evenly distributed in water.

2. PARTICLES OF MATTER ARE CONTINUOUSLY MOVING- Particles of matter are continuously moving, that is, they possess what we call the kinetic energy. As the temperature rises, particles move faster. So, we can say that with increase in temperature the kinetic energy of the particles also increases.

3. PARTICLES OF MATTER ATTRACT EACH OTHER- Particles of matter have force acting between them. This force keeps the particles together. The strength of this force of attraction varies from one kind of matter to another.

States of Matter
1. THE SOLID STATE- all solids have a definite shape, distinct boundaries and fixed volumes, that is, have negligible compressibility. Solids have a tendency to maintain their shape when subjected to outside force. Solids may break under force but it is difficult to change their shape, so they are rigid.

2. THE LIQUID STATE- Liquids have no fixed shape but have a fixed volume. They take up the shape of the container in which they are kept. Liquids flow and change shape, so they are not rigid but can be called fluid. The rate of diffusion of liquids is
higher than that of solids. This is due to the fact that in the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.

3. THE GASEOUS STATE- Gases are highly compressible as compared to solids and liquids. The liquefied petroleum gas (LPG) cylinder that we get in our home for cooking or the oxygen supplied to hospitals in cylinders is compressed gas. In the gaseous state, the particles move about randomly at high speed. Due to this random movement, the particles hit each other and also the walls of the container.






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  #2  
Old December 7th, 2012, 05:31 PM
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Default Re: CBSE Notes Class 9

As you need CBSE Notes Class 9 and sample papers so I am providing you a link of our website, where we have already uploaded information about it. Here is the link:

http://studychacha.com/discuss/26647...ss-9-cbse.html
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  #3  
Old April 14th, 2014, 02:18 PM
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Default Re: CBSE Notes Class 9

I am in 9th class so I want to get the notes of Science subject of 9th class of Central Board of Secondary Education so will you please help me?
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  #4  
Old September 21st, 2015, 03:08 PM
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Please give the notes of chapter is matter pure around us 9th class
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  #5  
Old September 21st, 2015, 03:09 PM
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Please give the notes of chapter is matter pure around us 9th class


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