Class 3 Science Olympiad Questions with Answers

Plants

Our world is full of plants. Most plants have certain parts and attributes in common. There is also amazing diversity within the plant kingdom. This unit helps students understand the parts of plants and the functions of those parts. It explains photosynthesis as the process by which plants make their own food. It also explains how and why plants reproduce and grow, including the processes of pollination, fertilization, seed dispersal, and germination. The unit explains some of the key relationships between plants and animals. It also describes some of the many ways people use plants for both food and materials.

Birds are beautiful animals that can fly. Their body is divided into three parts: – head, Trunk and a tail. They have two pairs of limbs – the legs and the wings. Birds have legs, but no hands. Their wings are covered with feathers. Many birds can fly with the help of their wings. The Mouth of bird is called a beak. But they don’t have teeth. But birds itself distinguish with each other. Following are the features that distinguish birds from other animals and themselves too.

Feathers

Everything that is alive needs food. Those who do not eat meat or fish are called vegetarian. Those who eat meat or fish or both are called non vegetarian. Food that we eat either comes from plants or animals.

We cannot survive without food as it gives energy for proper functioning of our body. Our body needs energy all the time even when we are sleeping. Many organs function continuously either we are working or relaxing. Food helps in prevention and cure of disease.

Houses

We need a house to live in. Our house protects us from heat, cold, storm and rain It also protects us from animals and thieves. We see different types of houses around us. The types of houses we build depend upon our needs. A kachcha house is made up of mud and straw. It is found mostly in villages. It not very strong. A pakka house is made up of bricks, iron, wood, glass and cement. It is mostly found in towns. It is very strong. A multi-storey building is also a pakka house. It has many floors. Many family can live at different floors.

We have different modes of transport. In most parts of India we generally go to school by bus, car, bicycle, an auto rickshaw or by walk. But there are many places where it’s not easy for children to go to their schools. They have to travel long distances, cross rivers, jungles and deserts to go to school. Sometimes it can also be dangerous and difficult to travel.

Every day we speak with lot of people, at home, in the neighbourhood or in school. We talk to your mother/father about breakfast, school issues, likes and dislikes. What happens if we cant talk to people? Ideas and the feelings don't get exchanged. Thus communication plays an important role in everyday life in all the fields.

Human Body Systems

Humans have important body systems that help us stay alive and healthy. Each system plays an important role, and is made up of several key organs and components. The unit The Human Body helps students explore the structures that make up their body, and how the various parts of their body work together. This unit focuses on the following body systems: skeletal, muscular, nervous, respiratory, circulatory, digestive, and excretory.

The Solar System

The solar system consists of sun and all other object that travels around sun. These objects include planets, asteroids (pieces of rocks), natural satellites, meteoroids, comets, dwarf planets, dust and gases. The sun is the center of our solar system and exerts tremendous gravitational pull on planets, comets, asteroids, satellites and other objects. Our solar system is a part of the Milky Way Galaxy. There are many such galaxies in the universe.

Matter

Matter is all the stuff around us that is made from atoms and molecules. There are millions and millions of different types of matter. They are known as materials.

Light and Shadow

Light is form of energy and is very important in all aspects of our lives. In the absence of light plants would not able to grow as they require sunlight to prepare their food and in absence of plants, animal and human would have nothing to eat.

Our surroundings include plants, animals, water, land, air, sun, sky, clouds etc. All these affect our life and is our environment. All that surrounds and affects the life of an organism is called its environment.

The three factors of the environment are