Cbse Notes chapter-1 Development Economic National Development Development is the sum total of income plus quality of life. Besides seeking more income one way or another, people also seek things like equal treatment, freedom, security, respect of others, etc. →Different people have different goals in their life. what may be development for one may not be development for another. This can be understood by the following example:To get more electricity, an industrialist may want more dams. But this may submerge the land and disrupt the lives of people who are displaced, such as tribes. →One common thing among all people is the desire for more income .with this income they buy goods and services for their daily needs.Quality of life depends on non-material things also.For example job may give you less pay but may offer regular employment that enhances your sense of security. →Ideas of development differ at individual and national level .for example, a landless rural labourer may desiree m

Cbse notes class-10 social science Resources and   development(Geography) →Resources:  Natural endowments in the form of land, water, vegetable and minerals are called natural resources. Resources are materials that can be transformed in such a way that they become more valuable and useful for fulfilling human needs. → Resources can be classified in the following ways: (a)On the basis of origin: (i)Biotic-resource obtained from biosphere having life such as human beings, flora and fauna, fisheries etc. (ii)Abiotic-Things which are composed of non-living such as rocks and metals. (b)On the basis of exhaustibility: (i)Renewable-Some resource can be renewed or reproduced by physical, chemical or mechanised processes. For example :solar and wind energy, water forests and wildlife. (ii)Non-renewable-these occur over a very long geological time.Minerals and fossil fuels are examples of such resources. (c)On the basis of Ownership: (i)Individual-these resources are owned by private individual

Cbse notes class-10th social science(geography) Chapter-4 Agriculture Type of Farming , Cropping Pattern, and Major Crops Agriculture means land cultivation.It also includes animal husbandry and Fishing. →At present in different parts of India, the types of farming being carried out are primitive subsistence farming , intensive subsistence farming, and commercial farming. →Primitive subsistence farming is characterised by small and scattered landholding and use of primitive tools. The farmers do not use fertilisers and high-yield varieties of seeds. →Intensive subsistence farming is carried out in the areas with high population pressure on land . Irrigation, fertilisers, and pesticides are used to get maximum output from limited land .Various machines are introduced. →Commercial farming is characterized by use of higher doses of modern inputs in order to obtain higher productivity. →Plantation farming, a form of commercial farming , involves growing of a single crop on a large area. →I

Class-9th Practice paper and important questions for examination. Time 3 Hours Maximum Marks-90 General Instructions: -  1. The question paper has 30 questions in all. All questions are compulsory. 2. Questions from serial number 1 to 8 are very short answer questions. Each question carries 1 mark. 3. Questions from serial number 9 to 20 are 3 marks questions. Answer of these questions should not exceed 80 words each. 4. Questions from serial number 21 to 26 are 5 marks questions. Answer of these questions should not exceed 120 words each. 5. Question number 27 to 28 is map questions. After completion, attach the map inside your answer book. 6. Questions number 29 to 30 of OTBA are 5 marks each questions. 1. Which community played cricket for the first time in India?    OR What was the cockade? 2. In which type of natural vegetation Silver fur is found?  3. How many seats in Lok Sabha is reserved for Scheduled caste?  4. Who founded the political party Lok Dal ?  5. What is the tenure

Chapter-11 cbse notes for class 10th science Notes The Human eye and The Colourful world Human Eye: The sense organ that helps us to see. →located in eye sockets in skull. →Diameter of eye ball -2.3cm Parts of Human Eye Cornea : It is the outermost , transparent part.It provides most of the refraction of light. Lens: It is composed of a fibrous , jelly like material.Provides the focused real and inverted image of the object on the retina.This is convex lens that converges light at retina. Iris: It is a dark muscular diaphragm that controls the size of the pupil. Pupil: It is the window of the eye.It is the central aperture in iris.It regulates and controls the amount of light entering the eye. Retina: It is a delicate membrane having enormous number of light sensitive cells. Far Point: The maximum distance at which object can be seen clearly is far point of the eye.For a normal adult eye, its value is infinity. Near point or least distance of distinct vision The minimum distance at wh

Chapter -15 Notes Our Environment  •Everything that surrounds us is environment. It includes both living(biotic) and non-living (abiotic)Components. •Interaction between these biotic and abiotic components forms an ecosystem. •In an ecosystem living components depends on each other for their food which give rise to food chains and food webs in nature. •Human activities lead to environment problems such as depletion of ozone layer and production of huge amount of garbage. Ecosystem All the interacting organisms in an area together with the non-living constituents of the environment from an ecosystem.Eg forest , pond etc. Types of ecosystem: It Is of two types: (a) Natural ecosystem: The ecosystem which exist in nature on its own.Eg forest, lake, Ocean. (b) Artifical ecosystem: Man -made ecosystem are called artificial ecosystem.Eg , crop field, aquarium, garden. (a)Abiotic Components: All the non-living components such as air, land ,  water, light, temperature etc.Form the components. (

Cbse Science notes class-10th Chapter-12 Electricity  •Charge is a fundamental particle in an atom it may be positive or negative. •like charges repel each other. •Unlike charges attract each other . Coulomb(C): S.I unit of charge 1 Coulomb charge=charge present on approx 1.6×10¹8 electrons •Charge on 1 electron =Negative charge of 1.6×10¹9C               Q=ne Where     Q=charge (total)                  N=No.of electrons                  E=charge on 1 electron Current(I): The rate of flow of charge is called current.          Current=Charge                         –––––––                           Time          I =Q              —               T     S.I unit of current =Ampere(A)                1A=1C s¹                1mA=10³ A                1uA =10 6 A   Current is measured by Ammeter its symbols is   Ammeter has low resistance and always connected in series. Direction of current is taken opposite to flow of electrons as electrons were not known at the time when the phenomenon of el