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 …
Why do we immediately pull our hand away when touched a hot object? Because of a reflex action. You will be amazed to know that the brain is not at all involved in this process. The signal goes to the spinal cord and comes back from there signalling muscles to move away quickly before we …
Genes are the basic fundamental units of life. They are transferred from the parents to offsprings by a complex process. Ever wondered why we don’t look exactly like our parents? Or why we don’t look identical to our siblings? Also, we humans look way too different from our ancestors. Humans evolved from their ancestors through …
Whenever you stand in front of a mirror, you see an image of yourself in it. Ever wondered how is it possible? Or how are we able to perceive objects with our eyes? All these things are possible because of “Light” and the magical phenomena of “Reflection” and “Refraction”. Does that mean the light makes …
Vision is the dominant sense for us. We perceive almost 80% of all impressions using our sight. Ever wondered what would you be without those spherical pair of eyes? Difficult to imagine, right! Indeed, our eyes are the windows to the wonders of the world. Sight is the precious gift we can’t take for granted. …
On a hot sunny day, you return home covered in sweat only to see that there is no electricity and hence no Air Conditioner. What would it feel like? Electricity has become a modern necessity for humans because it is a controllable and convenient form of energy. Ever wondered how does electricity flow in an …
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