Presentation is a process of presenting a topic to audience. A speech or talk in which a new product, idea, or piece of work is shown and explained to an audience. Nowadays teachers were making these type presentation for students so they can easily able to understand any difficult topics by visual treat.
Here I am introducing the changes around us under the topic "PHYSICAL & CHEMICAL CHANGES". Physical change means change happen in physical properties and Chemical changes means changes in chemical properties for further details click and see...
Click here.......to see the changes happening around us through science .