NCERT Notes Class 9 Geography: Class 9 Geography notes for Chapter 6 on Population are important for CBSE board exams. These notes cover important topics like where people live, how old they are, and why they move from place to place....
Matter is defined as anything that occupies space and has mass. Modern scientists divide matter into two categories: physical properties and chemical properties. The matter is classified as solids, liquids, or gases based on its physical properties. Solids include things like sugar, sand, iron, and rocks. Water, milk, petrol, oil, among others, are liquids, while air, oxygen, and steam are gases. By altering pressure and temperature, one state of matter can be transformed into another. Applying pressure and lowering the temperature can turn a gas into a liquid. This is covered in depth further below....
Sublimation is an interesting phenomenon, wherein the gas is derived from a solid without passing through the liquid phase. Sublimation is shown by camphor in real life as it directly goes from the solid to the gaseous state, without passing through the liquid state....
Food Security is multi-dimensional and means something more than getting two square meals. Food security is described by the United Nations Committee on World Food Security as, having physical, social, and economic access to adequate, safe, and nutritious food that fits their food choices and dietary needs for an active and healthy life at all times. There are three dimensions to food security:...
Small-Scale Industries Predominate: Class-10 History Chapter-4 The Age of Industrialization discusses that the Age of Industrialization was a period of social and economic change that transformed a human group from an agrarian society into an industrial society. Small-scale industries predominated in the late 19th and early 20th centuries. This was due to several factors, including the high cost of capital, the lack of skilled labour, and the limited availability of raw materials. Small-scale industries were also more flexible than large-scale industries, which allowed them to adapt to changes in the market more easily....
