In the last chapter, we learnt that every living and non-living thing on the Earth exhibits motion. In this chapter, we will learn more about what causes the motion. This question has boggled the physicists for many centuries. To move any object, you require ‘Force’. In the same way, to stop any moving object, you …
Throwing a ball, lifting a heavy object or stopping a moving thing, all of these activities require an application of force. And what do we mean by force? Force can be defined as actions that we perform on various objects in order to move them. Force is associated with the concept of pressure. How are …
Majority of living beings can’t stay in one place for hours long. Even the laziest person will show slight changes in his position. This change of position indicates that we move from one place to another. This change of position and movement is called – ‘Motion’. Not only all living organisms exhibit motion, but non-living …
How would you know if you are farther or nearer to any object? By measuring the distance between you and the object. It is as simple as that. But before measuring, you must be familiar with all the units of measurement. Units such as centimeters, meters, kilometers help you scale the object. Understanding the applications …
Though we don’t exactly look like our parents, we may have some of their features such as our eyes can be the same as the mother’s or hair can resemble the father. But do you ever question yourself why is that so? Well, our genetic material is a combination of mother’s and father’s genes. The …
What term comes to your mind when you collectively recall all the elements surrounding you? That’s right. It’s the environment. The environment is a collective term which includes all the biotic and abiotic elements. But in recent times, our environment has been going through some bizarre changes. The changing lifestyle of humans, the changing conditions …
Water, air, soil and land are some of the important natural resources on the Earth. All these resources are constantly exploited and polluted. It is evident that if humans continue to exploit these resources, there will come a time when we will be left with none. Hence, to avoid such a situation and reduce the …
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 …
Given two things – lemon juice and soap powder, how would distinguish between what is an acid and what is 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, …
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, …
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