Matter in Our Surroundings

Chapter 1 of CBSE 9 science syllabus—Matter in Our Environment—is one of the most crucial chapters, not only for the boards but also for the JEE curriculum that we will study in 11th and 12th grades since it introduces us to the physical properties of matter and the many states of matter. Additionally, we will encounter crucial ideas like the properties of particles in states of matter.


Therefore, with this in mind, Speedlabs has developed comprehensive concept nodes for each of the subtopics, along with appropriate numerical prepared by our highly qualified and experienced faculty, which will aid students in resolving all conceptual ambiguities for boards as well as competitive exams and assist them in achieving their goals. For brilliant results, students are recommended to refer to the concepts and numerical offered on our site.


Matter in our environment Class Notes: 

If you’re stumbling around in our surrounding notes looking for information, you’ve come to the right place. You can use the Matter in our Surroundings class 9 notes to aid in review and exam preparation. Here, we covered the terms “matter” and “its properties,” “diffusion” and “its use,” “Brownian motion” and “states of matter,” as well as SI units for fundamental physical quantities and the three states of matter and how they relate to one another.




  • Matter is anything in the cosmos that has mass and takes up space. 
  • Or simply, matter is anything that can be sensed by our senses and has both mass and volume. 
  • Take a book, pencil, phone, or anything else nearby as an illustration of matter. 
  • The entire review sheet may be found under the class 9 notes section titled “Matter in our Surroundings.”


Composition of matter:


An item made from the combination of two or more elements is said to be composed of matter if it has characteristics unconnected to any of the constituents in their original states. When components in a composition of matter are combined chemically or mechanically, the outcome can either be a compound material that can be mechanically separated into its component parts or a new substance that can only be destroyed through chemical analysis.


What are the three different types of matter?


Solid – Along with liquid and gas, one of the three basic states of matter. (Occasionally, ionized gasses or plasmas are thought to be the fourth state of matter.) A solid evolves from a liquid or gas because the energy of atoms decreases when they occupy a reasonably organized, three-dimensional structure.


Liquid – liquid detergent that flows unhindered, like water. 2: exhibiting properties of a liquid but not being a solid or a gas. 3a: a pair of enormous, liquid, sparkling eyes. B: The smooth, melodious singing of the robin, which is devoid of harsh tones.


Gas – A condition of substance known as gas lacks a distinct shape and volume. Compared to other types of matter, such as solids and liquids, gasses have a lower density. Since particles have a lot of kinetic energy and aren’t strongly attracted to one another, there is a lot of unoccupied space between them.


Classification of matter:

The three states or phases in which matter can exist are solids, liquids, and gases. A substance is described as being uniform and homogeneous throughout. A material can either be composed of elements or compounds. Since they are pure substances, elements cannot be chemically divided into less complicated ones.


Characteristics of matter particles:


  1. The small matter particles are separated by space.


Particles of one form of matter enter the spaces between particles of the other type of matter when we create tea, coffee, or lemonade (nimbu paani). For instance


When a drop of blue ink or two or three crystals of potassium permanganate (purple, solid) are dissolved in 100ml of water in a beaker, the water turns blue or purple. This demonstrates that there is enough room for matter particles to move around.


  1. Matter is made up of moving particles.


The minuscule particles that make up matter are in motion all the time. The random, zigzag motion of minute particles floating in a liquid or a gas is known as brownian motion. Each moving object possesses kinetic energy. As the temperature rises, particles move more quickly. It suggests that particle kinetic energy increases along with temperature.

The aroma permeates the room when an agarbatti or incense stick is lit. Similar to this, the entire room will be able to smell perfume if it is sprayed in a corner of the room. You can only smell an incense stick’s aroma when it is close to you. But once the incense stick is lit, the entire room is filled with the fragrance.


  1. Matter particles are drawn to one another.

The force of attraction that exists between matter particles holds them together. This force of attraction varies in power depending on the type of substance.


For a better understanding of how matter particles are drawn to one another, consider the example below.


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