3rd Class

Knowing Birds   Birds are the wonderful animals. They are found in different colours, shapes and sizes. They make our world beautiful and colourful. We all love twittering and chattering of birds. The most important thing about the birds is that they can fly. Their ability of flying always fascinates us.   Characteristics of Birds The following are the characteristics of birds:   Birds have Wings and Feathers Almost all the birds have wings that help them to fly easily from one place to another. Their skin is covered with feathers. The feathers of birds also help them to fly. Flying is the unique feature of birds. Birds have Light Body and Hollow Bones Birds have very light body that more...

Plants: Our Friend   Plants are one of the most important living things that have made the life possible on this planet. They are the only source of life giving oxygen. Plants breathe in harmful carbon dioxide gas and breathe out oxygen. Thus, they not only give us oxygen but also absorb harmful carbon dioxide. They are very helpful to us.   Characteristics of Plants The plants have got some special characteristics which make them different from other living beings. The characteristics of plants are given below:   Plants Make their Own Food (Autotrophs) Green plants are autotrophs. They make their own food in the presence of carbon dioxide, water and sunlight. Green plants have a pigment called chlorophyll that helps diem to make food. more...

Human Body   Our Body     Human body consists of different parts. All of these parts have specific functions to perform. For example, we can see with the help of eyes and walk with the help of legs.   Five Sense Organs You know that we have five sense organs, which helps us to feel and know the world around us. Our sense organ and their functions are as follows:              Eyes We can see with the help of eyes. It is the organ of sight. Whenever we see an object, an image of the object is formed inside our eye. It is then passed on to the brain with the help of nerves, our brain tells us what the object is.   Tongue We can taste with the more...

Matter   Matter Everyday we see various things around us. Some of them are heavy, for example, I computer. Some of them are light, for example, your pencil. This is because, different objects have different masses. The mass of an object tells us whether an object is heavy or light, or how much heavy or light. Every object also occupies space. For example, books in your school bag, pencils in your pencil box, water in your water bottle, all occupy space. Anything which has mass and occupies space is called matter. Matter exists in three different forms: (i) Solid                        (ii) Liquid (iii) Gas These three forms of matter are called the states of matter.   Solids Objects like books, pen, pencil, cricket bat, doll, tiffin box, school bag, etc have a fixed shape. They do not change their shape if we move them more...

Environment and Atmosphere   Environment Everything that surrounds us makes our environment. Our environment includes living things like plants and animals and non-living things like air, water, soil, sunlight, weather, seasons, etc. All these are the components of environment   Air Air is all around us. Moving air is called wind. Air contains water in the form of water vapour. It also contains dust particles, gases like oxygen, hydrogen, carbon dioxide, etc.     Water Water is very important for life on earth. Rivers, glaciers and lakes are sources of fresh water on earth. Seas and oceans contain salt water.   States of Water Water occurs in all the three states. Ice is the solid form of water. When ice melts, it changes more...

Motion and Transport   Motion Movement of an object from one place to another is called motion. We see many things around us are in motion. Motion takes place whenever force is applied. For example, when a boy throws a ball, movement of the ball takes place due to the force exerted by the boy.     Different Types of Motion There are three types of motion. They are uniform motion, non-uniform motion and circular motion.   Uniform Motion If a body travels equal distance in equal interval of time then it is called uniform motion. For example, a car travels first 30 kilometres in one hour and next 30 kilometres again in one hour and so on then we can say that car more...

Natural Resources   Nature gives us many things: For example, forest, sun, wind, water, minerals, land, etc. The things that we get from nature are called natural resources. Natural resources are classified into: (i) Renewable resources (ii) Non renewable resources   Renewable Resources Renewable resources are those resources, which we can use repeatedly. For example, trees, soil, solar power, wind power, etc. On the basis of the origin of these resources, they can be classified into:   Biotic: The resources that we derive from living organisms. For example, tree. Abiotic: The resources that we derive from non-living things. For example, land, water, air, etc.   Non Renewable Resources Non-renewable resources cannot be regenerated. Oil, coal, natural gas, etc are some examples of non-renewable resources. Below given are some important natural resources:   Forests Forests are renewable natural resources. They attract rain and prevent floods. more...

Our Universe   Our Universe Our universe is a large and unimaginable expanse of gases, dust, stars, planets, etc. In this chapter, we will learn about some members of our universe.   Stars Stars are the huge balls of fire that twinkle in the night. They are very far away from us. A telescope is used to see the stars, the moon and the planets clearly.   Sun Sun is a star. It is a huge ball of fire that gives us light and heat. Sun is also the head of a big family called solar system. Solar system consists of sun and eight planets along with their satellites.   Planets There are eight planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. There is also a dwarf planet in the solar system known as Pluto. A more...

Our Safety and First Aid   Our Safety and First Aid Our body is like a machine performing different functions like walking, running and eating, etc. We should take care of ourselves by keeping safe from illness and injury. We should follow safety rules at home, school, on the road and in the playground.             Some Safety Rules to be Followed at Home  

• Do not leave your toys, bags and books lying on the floor. You might trip over them and injure yourself.
• Be careful while walking on wet bathroom floors. You might slip on the floor and get hurt.
• Don't use water near electrical appliances. Don't touch them with wet hands. You might get an electric shock.
• Don't jump on the stairs. You might fall down.
• Don't play with knives and scissors.

  Safety Rules at School  

• Do more...

Reasoning and Aptitude   Introduction Learning process is dependent on one's ability to think logically and reason quickly and effectively. So reasoning and logic skills are an important part in our progress as these skills are very useful in our day to day life. In this chapter, we will learn various problems related to reasoning and aptitude.   Problems Based on Alphabet Test and word Formation Following table represents each letter of the English alphabet by a number which corresponds to that letter's position in the alphabet.     There are 26 letters in English alphabet. The first letter is A and last letter is Z.   Some Important Tips  

Arrange the letters in different combinations given in options to find a meaningful word if the numbers are given to the more...