#cbsenotes

Class 12 History Notes Chapter 10 Colonialism and the Countryside: Exploring Official Archives In India British rule was first of all established in Bengal. Permanent settlement of land revenue was adopted in Bengal in 1793. The economic measure adopted by the British government made India a consumer of goods manufactured in England. By the end …

Class 11 Geography Notes Chapter 10 Atmospheric Circulation and Weather Systems Air expands when heated and gets compressed when cooled. This results in variations in the atmospheric pressure. The result is that it causes the movement of air from high pressure to low pressure, setting the air in motion. Air in horizontal motion is wind. …

Class 11 Geography Notes Chapter 9 Solar Radiation, Heat Balance and Temperature We live at the bottom of a huge pile of air. We inhale and exhale but we feel the air when it is in motion. It means air in motion is wind. Envelop of air is atmosphere which is formed of multitude gases. …

Class 11 Geography Notes Chapter 8 Composition and Structure of Atmosphere The air is an integral part of the earth’s mass and 99 per cent of the total mass of the atmosphere is confined to the height of 32 km from the earth’s surface. The air is colorless and odorless and can be felt only …

Class 11 Geography Notes Chapter 7 Land forms and their Evolution After weathering processes have had their actions on the earth materials making up the surface of the earth, the geomorphic agents like running water, ground water, wind, glaciers, waves perform erosion. Due to changes in climatic conditions and vertical or horizontal movements of landmasses, …

Class 11 Geography Notes Chapter 5 Minerals and Rocks About 98 per cent of the total crust of the earth is composed of eight elements like oxygen, silicon, aluminium, iron, calcium, sodium, potassium and magnesium, and the rest is constituted by titanium, hydrogen, phosphorous, manganese, sulphur, carbon, nickel and other elements. Thus, a mineral is …