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important questions frkm the lesson Matter in our surroundings class 9
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Important Question of Science Class 9 Chapter 1
Students will learn a lot of things from the chapter 'matters in our surroundings', let's discuss some of those things:
Matter
The matter is considered as a substance from which our cosmos is made of. Any substance with some mass, that takes volume and which can get comprehended by the senses is termed as a matter. There are a lot of exceptions in this case such as heat, light energy, electrical energy, sound energy, magnetism, vacuum and a shadow. This all is not considered a matter because they don't have mass and they don't take any place.
The substance 'matter' is believed to be composed of small constituent parts. Matters have minimal and minute units. Taking a glance on them is very difficult even with a high power microscope.
To understand more simply, everything around you is made up of matter. Atoms and compounds of everything are made with small parts of matter. These atoms are responsible for building the things that we see and touch every day.
Characteristics of Matter
The different characteristics of matter are listed below:
The matter is a substance which is made up of small particles.
It is believed that the particles consist of intermolecular spaces between them.
The particles in the matter have a locomotive nature due to the kinetic energy inside them. When there is a surge in the temperature, the motion of particles intensifies.
The bits in the matter attract each other, but this reciprocal force of full becomes operational only when the particles are very close to each other. In solids, the particles are firmly held, which is why it is believed that they have a superior force of attraction. Whereas in gases, particles are loosely held; thus, they have a minimal force of attraction.
Nature of Matter
Depending upon the physical state of different materials or substances, the nature of matter is classified into three categories:
Solids:
Solids are substances where the particles are held very close to each other due to a strong intermolecular force. The particles are so tightly held at their place that they can have only vibratory motions and nothing else. As the particles are tightly held, therefore solids have a definite shape and definite volume. Some examples of solids are wood, iron, glass, etc. Students while practising important question of science class 9 chapter 1 will learn more about this substance and that too in a straightforward way.
Liquids:
Those substances where the intermolecular forces are weak enough to allow the movement of particles are generally known as liquids. These particles are also closely held with each other, but they have more freedom of movement than the particles of solid. Liquids are substances with a definite volume but with no definite shape. These substances generally take the shape of the container in which they are stored. Some examples of liquid substances are milk, water, etc. To gain more detailed knowledge on this particular substance, students have to continue practising ch 1 science class 9 important questions without fail.
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