physical and social sciences

Environment is defined as the surroundings in which the organism lives. The environment may be the physical environment, the chemical environment or the biological environment. Thus, the environment has two components - abiotic and biotic. The abiotic environment includes the air (atmosp..

Environment refers to the natural elements that make up the earth and surround living organisms The abiotic or physical aspects of the environment refer to elements like air, soil, water etc. The biological or biotic components of environment are the plants and animals Natural res..

The dams submerge forever the traditional living areas and cause loss of traditional sources of livelihood. A large number of villagers and tribals who have been displaced by various development projects are largely poor. They do not get any benefits from these projects and are alienated from the..

Personal health Characteristics and changes in populations Types of resources Changes in environments Science and technology in local challenge..

Personal health Populations, resources, and environments Natural hazards Risks and benefits Science and technology in societ..

Personal health Populations, resources, and environments Natural hazards Risks and benefits Science and technology in societ..

Physical Change - A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same. No new substance is formed. It is usually a change, which is reversible. By reversing the process, the original substanc..

Most of the non-metals exist in two of the three states of matter at room temperature: gases (oxygen) and solids (carbon). These have no metallic lustre, and do not reflect ligh..

Properties of objects and materials Position and motion of objects Light, heat, electricity, and magnetis..

Properties and changes of properties in matter Motions and forces Transfer of energ..