Social Science 1 Marks Each

The alluvium and the silt deposited at the bottom of the lakes and ponds should be removed.

Vegetation is classified on the basis of two factors-altitude from the sea level and climatic variations.

Various animals, birds and insects are included in wildlife.

The vegetation which can grow by itself without the help of man is called natural vegetation.

The resources should be conserved so that the shortage of resources is not created in the future. For that, they should be used with well-planning, judiciously and rationally.

The use of resources is increasing day by day due to the increasing population and the extraordinary development in science and technology.

Meat, hides, skin with fur, horns, nails, bones, teeth, wool, etc. are obtained from the wildlife.

Those resources which are and which cannot be renewed themselves in future are called 'Non-renewable Resources'. e.g, mineral coal, crude oil, natural gas, nuclear minerals, etc.

Those resources which automatically replenish the quantity used in a specific time fe. which are inexaustible are called 'Renewable Resources' eg, forests, animals, birds, sunlight,wind, etc.

Those elements which are obtained from the nature and can be used without much process are called 'Natural resources Air, water land. minerals, energy resources, etc. are natural resources.

Utiliy is a characteristic of a resource.

When a human utilises the natural elements to satisfy his needs through his capacity or skill it is called a resource.

Our requirements or needs can be satisfied through resources.

A forest in general means a large land area covered with trees and shrubs.

The vegetation which can grow by itself without the help of man is called natural vegetation.

When a human processes change the basic characteristics of the natural elements with the help of his knowledge and skill and modifies to make usable are called 'Human made Resources'. Cement, electricity, buildings. roads, bridges, terraced farms, multi-purpose projects, tunnels, technology, etc. are Human made Resources.

Those resources which are used once and which cannot be renewed themselves in future are called 'Non-renewable Resources'. e.g., mineral coal, crude oil, natural gas, nuclear minerals, etc.

Those resources which automatically replenish the quantity used in a specific time i.e. which are inexaustible are called 'Renewable Resources'. e.g., forests, animals, birds, sunlight, wind, etc.

Those resources which are rarely available at one or two places all over the world are called Uniquelities Resources; e.g. cryolite. It is available in Greenland of Europe only.

Those resources which are available from limited places only are called Rare Resources: e.g.. coal, crude oil, natural gas, various minerals. etc.

Those resources which are generally easily available are called Common Resources; e.g., land, water, vegetation, etc.

Those resources which are available everywhere with ease are called Ubiquitous Resources; e.g, the useful gases like oxygen and nitrogen present in the atmosphere.

When a human processes change the basic characteristics of the natural elements with the help of his knowledge and skill and modifies to make usable are called 'Human made Resources'. Cement, electricity, buildings, roads, bridges, terraced farms, multi-purpose projects, tunnels, technology, etc. are Human made Resources.

Those elements which are obtained in nature and which can be used without much processing are called 'Natural Resources'. Air, water, land, minerals, energy resources, etc. are natural resources. All the elements in the environment that are suitable for human use are natural.

Resources are the foundation for the economic growth and development of human society. Our needs or the necessities are satisfied through the resources. When a human uses his capacities or skills to utilise the natural elements for satisfying his needs, they are called resources. Utility is a characteristics of resources.