 Good morning children. I give you wonderful and lovely faces smiling all around me. I just want you to do one more thing. As I can see wonderful faces around me, I want you to have a look around your classroom and tell you a few things that you can feel or that you have in your back or that you can feel around you. Yes, you can see your books, your table, your chair, the furniture around you, the blackboard, the chalk pieces, the water bottle. Yes, you can feel the air around you. You can see the plants which is giving you nice and cool air. Now, tell you one thing. Are all of these things safe to feed, touch and taste? No. They all are categorized into three different things. Yes, you are right. Solids, liquids and gases. So today, the topic which we are going to study is the states of matter. All the duster, all the blackboard, all the chalk pieces which is in my hand, the face solid and how? Why do you think it is like that? It is because of the modular arrangement in these objects. So solids, if I consider this bottle as the example of the solid, then I can see the molecules in the solids are very closely and tightly packed or stuck to one another. And that is the reason they do not until and unless I break it. Yes, so the solids because of the molecular arrangement. Next, there is your water bottle or the milk or the juice. They are all liquids. Now, this also is one of the states of matter. Now the liquid or the molecules in the liquid are arranged, not well arranged in the solids. The space between them is, you know we can have a little space in between them. And that is the reason they can move between one container and another in between. So they can be overlapped because of the space which is present in between these molecules. I can feel the air, the oxygen, the carbon dioxide, all these are nothing but the examples of cation state. Okay, now the spaces feel the air.