Everything that is present our environment goes through some kind of a change. Some changes are permanent, while some are temporary. For example – Water when freezes below 0° C, changes to ice, but turns back to water when heated. This change is temporary and physical. On the other hand, an iron rod when exposed …
Take a cube of ice in your hand. Now try to see through it. What did you notice? Can you see through easily and clearly? NO. Now take the same ice and put it in water. Does it float? Yes, it does! It’s not magic, but it’s SCIENCE. The Ice appears smooth and shiny, its …
We have already learnt about natural fibres in our previous classes. In this chapter, we take a detailed look on synthetic fibres i.e man-made fibre cloth. Synthetic fibres are created by chemically processing natural fibre. Some of the examples of synthetic fibres are rayon, nylon, polyester, and acrylic. Also, we will learn some important factors …
Different types of cloth fabrics are available in the market. From cosy wool to the glossy silk, there are a variety of materials available. The warmth of woollen clothes is very comforting, while silk sarees never go out of style. But have you ever wondered where do we get these fabrics from? Well, we get …
One of the best ways to light a fire is by using a matchstick. What would happen if you keep a matchstick in the open air? Will it start to burn all by itself? No right! But why is this so? Well, all flammable substances have specific ignition temperature. After reaching that point, a substance …
Metals! This word governs our lives. From Buildings to Statues. From Transport to Utensils. Every minute thing that we use or encounter daily are made of Metals. But how are these Metals obtained? And where are they found? All these questions are answered by the branch of science that deals with the extraction and purification …
Metallurgy – Definition and Process of Extraction Read More »
Why is Gold considered a metal, and wood a non-metal? In this chapter, we will take you through a detailed study of metals and non-metals, covering all the important topics that will help you understand the difference between these two categories. You will also be acquainted with definitions and meaning of terms such as ductility, …
Given two things – lemon juice and soap powder, how would you distinguish between an acid and a base? An acid is sour, whereas a base tastes bitter. What if we told you that a healthy orange juice and not so healthy carbonated cold drink are nothing but acid? Not only this, but the mixture …
Don’t some questions leave your mind baffled? Why does lime juice taste sour and not sweet? Why does soap powder give out bubbles? Do you know that the mixture of lime juice and soap water will produce Salt and Water? In this chapter, we take you through the definitions of Acids and Bases. Here, you …
What is common between the burning of a matchstick and rusting of an iron nail? In both cases, a new substance is formed. The burned matchstick turns to ashes and smoke, while the iron forms a red patch over it. This change is irreversible, meaning that none of the previous substance can be brought back …
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