The world is everything that surrounds us

This article presents material for grade 3 students, the world for which are provided in the form of simplified models of the ecosystem. Also considers the concept of human society, its structure and importance in the life of every person. In simple examples, the process of explaining the world. This is the main task of this material.

The Concept of ecosystem

In order For the student 3 classes to better understand what is a planet Earth, it is necessary to demonstrate the model globe. Our planet has an outer shell called the atmosphere. All living organisms on Earth breathe atmospheric air. The atmosphere protects the Earth from overheating, radiation from cosmic rays.

The Land is water-shell – the hydrosphere. Hydrosphere form underwater water, rivers, seas, oceans of the globe.

The Lithosphere forms a rigid shell of the Earth. The land, the mountains, the earth belongs to the lithosphere.

All living organisms on Earth live in the biosphere. The biosphere is located on the border of all the other three spheres.

All living organisms on Earth live in air, water and land environment. In order for the circulation of substances in nature is not stopped, all living organisms can't do without each other. All organisms according to the functions (or you can still compare the functions of organisms with professions) are divided into producers, consumers and destroyers. Manufacturers – plants and trees, consumers – it is basically all animals, but to the destroyers include bacteria, fungi and worms. Producers, consumers and destroyers can't live on Earth without air, water, soil and rocks. Consequently, all of the above elements can be divided into two large groups: living and nonliving nature. Thus, it is possible to present the world – animate and inanimate nature.

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Society. Its structure

For the student class 3 for the definition of society should be the example of his own family, which (in the bulk) is composed of members: father, mother, grandparents, brothers, sisters. Family (group of people) is the elementary or basic unit of society. All members of society interact with each other. Thus, also the society – the world around us. All of society rests on four pillars. These components are the Parliament, hospital, Church, prison. The world – a structure that was formed in ancient times, and its base and preserved to date.

Economy Concept

Let's set aside those things that are necessary for human life. These things are called needs. We can relate to human needs? This need for food, rest, clothing, work, health, transport, security. This list could go on and on. The needs of humanity has a different purpose and meaning.

Needs may be cognitive (theater, books, television), physiological (hunger, sleep), material (apartment, computer, car, house). Much nature gives us – heat of the sun, air, water, the harvest of the earth. And the love, fellowship, friendship-that's what we get, communicating with each other. And all material wealth is something that cannot be found in nature (houses, cars, clothes) - gives us economy. In Greek language – "the household". Here is a simple explanation for grade 3 the world will look simple and clear.

Conclusion

In conclusion, I would like to say that, despite the scale and complexity, the world – this is a fairly fragile structure, value, and most importantly, preserve it for future generations is the main task of adults to children. But in this stage of training the younger generation need to form a value system.