Class 7 Social Science Human Environment Settlement Transport and Communication Exam Notes

Class 7 Social Science Human Environment Settlement Transport and Communication Exam Notes. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.

Settlements

The place where a building or a settlement develops is called its site.The natural conditions for selection of an ideal site are-

1.favourable climate

2.availability of water

3.suitable land

4.fertile soil

Settlements :

Settlements are places where people build their homes. Early human beings lived on trees and in caves. When they started to grow crops it became necessary to have a permanent home. The settlements grew near the river valleys as water was available and land was fertile. With the development of trade, commerce and manufacturing, human settlements became larger. Settlements can be permanent or temporary.

 (A) Temporary settlements :

1.Settlements which are occupied for a short time are called temporary settlements.

2.The people living in deep forests, hot and cold deserts and mountains often dwell in such temporary settlements.

3.They practice hunting, gathering, shifting cultivation and transhumance.

 (B) Permanent settlements :

 In these settlements, people build homes to live in.   

 Settlements can be rural or urban. :

 (a) Rural settlement -

1.The villages are rural settlement where people are engaged in activities like agriculture, fishing, forestry, crafts work and trading etc.

2.Rural settlements can be compact or scattered.

3.A compact settlement is a closely built area of dwellings, wherever flat land is available.

4.In a scattered settlement dwellings are spaced over an extensive area.

5.This type of settlement is mostly found in hilly tracts, thick forests, and regions of extreme climate.

6.In rural areas, people build houses to suit their environment. In regions of heavy rainfall, they have slanting roofs.

7.Places where water accumulates in the rainy season the houses are constructed on a raised platform or stilts. 

8.Thick mud walled houses with thatched roofs are very common in areas of hot climate. Local materials like stones, mud, clay, straw etc are used to construct houses. 

b) Urban settlement -

1. The towns are small and the cities are larger urban settlements.

2. In urban areas the people are engaged in manufacturing, trading, and services.

→ TRANSPORT

INTRODUCTION :

1. Transport is the means by which people and goods move. In the early days it took a great deal of time, to travel long distances. People had to walk and used animals to carry their goods. Invention of the wheel made transport easier.

2. With the passage of time different means of transport developed but even today people use animals for transport.

3. In our country donkeys, mules, bullocks and camels are common.

4. In the Andes Mountains of South America, llamas are used, as are yaks in Tibet.

5. The early traders from other countries used to take several months to reach India. They took either the sea route or the land route.

6. Aeroplanes have made travel faster. Now it takes only 6-8 hours to travel from India to Europe.

7. Modern means of transport thus saves time and energy.

8. The four major means of transport are roadways, railways, waterways and airways.

A . ROADWAYS :

1. The most commonly used means of transport especially for short distances are roads.

2. They can be metalled (pucca) and unmetalled (kutcha).

3. The plains have a dense network of roads.

4. Roads have also been build in terrains like deserts, forests and even high mountains.

5. Manali-Leh highway in the Himalayan mountains is one of the highest roadways in the world.

6. Roads built underground are called subways/under paths.

7. Flyovers are built over raised structures.

B. RAILWAYS

1. The railways carry heavy goods and people over long distances quickly and cheaply.

2. The invention of the steam engine and the Industrial Revolution helped in speedy development of rail transport.

3. Diesel and electric engines have largely replaced the steam engines.

4. In places super fast trains have been introduced to make the journey faster

5. The railway network is well developed over the plain areas.

6. Advanced technological skills have enabled laying of railway lines in difficult mountain terrains also. But these are much fewer in number.

7. Indian railway network is well developed. It is the largest in Asia.

C. WATERWAYS

Waterways are the cheapest for carrying heavy and bulky goods over long distances. They are mainly of two types – inland waterways and sea routes.

1. Navigable rivers and lakes are used as inland waterways.

2. Some of the important inland waterways are the Ganga-Brahmaputra river system, the Great Lakes in North America and the river Nile in Africa.

3. Sea routes and oceanic routes are mostly used for transporting merchandise and goods from one country to another.

4. These routes are connected with the ports.

5. Some of the important ports of the world are Singapore and Mumbai in Asia, New York, Los Angeles in North America, Rio de Janerio in South America, Durban and Cape Town in Africa, Sydney in Australia, London and Rotterdam in Europe 

D. AIRWAYS

1This is the fastest way of transport developed in the early twentieth century.

2. It is also the most expensive due to high cost of fuels.

3. Air traffic is adversely affected by bad weather like fog and storms.

4. It is the only mode of transport to reach the most remote and distant areas especially where there are no roads and railways.

5. Helicopters are extremely useful in most inaccessible areas and in time of calamities for rescuing people and distributing food, water, clothes and medicines.

6. Some of the important airports are Delhi, Mumbai, New York, London, Paris, Frankfurt and Cairo.

→ COMMUNICATION

Communication is the process of conveying messages to others. With the development of technology humans have devised new and fast modes of communication.

1. The advancement in the field of communication has brought about an information revolution in the world.

2. Different modes of communication are used to provide information, to educate as well as to entertain.

3. Through newspapers, radio and television we can communicate with a large number of people. They are therefore called mass media.

4. The satellites have made communication even faster. Satellites have helped in oil exploration, survey of forest, underground water, mineral wealth, weather forecast and disaster warning.

5. Now we can send electronic mails or e-mails through Internet.

6. Wireless telephonic communications through cellular phones have become very popular today.

7. Internet not only provides us with worldwide information and interaction but has also made our lives more comfortable.

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