Resource
5 May 2026

Elementor #1003

RESOURCES – INTRO Look around you—everything you use in daily life, from water and air to books, roads, and even your skills, is a resource. But have you ever wondered why some regions develop faster than others? The answer lies in how effectively resources are used. Understanding resources is the first step towards understanding development, sustainability, and our role in conserving nature. *What are Resources? Anything available in our environment that can be used to satisfy our needs is called a resource — provided it is technologically accessible, economically flexible , culturally acceptable. In simple words, not everything in nature is a resource. It becomes a resource only when: We have the technology to use it It is affordable to use It is useful for society   *Importance of Resources Resources are the foundation of development. Without them, no country can progress. Their importance can be understood in the following way: Basis of Survival: Resources like air, water, food, and land are essential for life. Without them, survival is impossible. Support Economic Development: Industries, agriculture, transport — all depend on resources. Example: Fertile soil helps in farming, minerals help in industries. Improve Quality of Life: Resources help in providing better housing, healthcare, education, and technology, making life comfortable. Drive Technological Advancement: Availability of resources like minerals and energy fuels technological growth. Example: Petroleum supports transport and modern industries. Regional Development: The availability of resources influences how developed a region is. Areas rich in resources often develop faster compared to resource-poor regions. *Human Beings as a Resource When people have education, skills, and good health, they can work efficiently and contribute to development. In this way, they become a valuable resource for the country. This concept is also known as Human Resource Development (HRD). The diagram shows that human beings are at the center of resource development, connecting nature, technology, and institutions. Nature provides raw materials like land and water, but they become useful resources only when humans use their knowledge and skills. Humans develop technology to transform these natural elements into usable forms and create institutions (like laws and organizations) to manage and distribute them properly. Thus, human beings act as the link that controls and coordinates everything, making them the most important resource. CLASSIFICATION OF RESOURCES Resources are classified into four main categories based on: Origin Exhaustibility Ownership Status of Development Each type helps us understand resources from a different perspective 1.Based on Origin This classification tells us where resources come from. Biotic Resources: These are obtained from living organisms. Example: Plants, animals, forests, fisheries Abiotic Resources: These come from non-living things. Example: Rocks, minerals, metals, water # This classification is important because it helps us understand the nature and source of resources. 2.Based on Exhaustibility This classification focuses on whether resources can be used again or not. Renewable Resources: These can be replenished or renewed naturally over time. Example: Solar energy, wind energy, water Non-Renewable Resources: These are limited and take millions of years to form. Once used, they cannot be easily replaced. Example: Coal, petroleum, natural gas # This classification is directly linked with sustainable development, as it teaches us to use limited resources carefully. 3.Based on Ownership This classification shows who owns the resources. Individual Resources: Owned by private individuals. Example: Land, house, wells Community-Owned Resources: Used by a group/community. Example: Public parks, playgrounds, grazing grounds National Resources: Owned by the country (government). Example: Roads, railways, rivers, forests International Resources: Beyond national boundaries and regulated by international institutions. Example: Oceanic resources beyond 200 nautical miles # This classification helps in proper management and fair distribution of resources. 4.Based on Status of Development This classification explains how developed or usable a resource is. Potential Resources: Available but not fully used yet. Example: Wind and solar energy in Rajasthan and Gujarat Developed Resources: Surveyed and currently in use. Example: Developed agricultural land Stock: Resources available but cannot be used due to lack of technology. Example: Hydrogen as a fuel (not fully usable yet) Reserves: Part of stock that can be used with existing technology but is conserved for future. Example: Water in dams, forests # This classification highlights the role of technology and planning in resource use. DEVELOPMENT OF RESOURCES Development of resources means using resources in a planned, systematic, and sustainable way so that they are available for both present and future generations. *Problems Caused by Indiscriminate Use of Resources The irrational and excessive use of resources has led to multiple issues: 1. Depletion of Resources: Many important resources like coal, petroleum, and forests are being used rapidly, leading to their exhaustion. 2. Concentration of Resources: Resources are concentrated in the hands of a few people or countries, creating a rich–poor divide. 3. Global Inequalities: This unequal distribution has caused economic and social inequalities across the world. 4. Environmental Degradation *Need for Sustainable Development -To overcome these problems, it is important to follow sustainable development. -It means using resources in a way that meets present needs without compromising the ability of future generations to meet their own needs. # History of Sustainable Development The Rio Earth Summit (1992) was a major international meeting held in Rio de Janeiro where countries realised that development should go hand-in-hand with environmental protection. During this summit, an important action plan called Agenda 21 was introduced, which guided nations on how to use resources carefully and promote sustainable practices in daily life. Building on this idea, the Sustainable Development Goals (2015) were introduced by the United Nations to take this vision further. These include 17 global goals to be achieved by 2030, focusing on overall development of society. RESOURCE PLANNING Resource planning is the careful strategy for using resources wisely, efficiently, and sustainably to meet present and future needs. It becomes necessary because: Resources are limited They are unevenly distributed across regions Overuse can lead to environmental problems   *Steps Involved in Resource Planning Resource planning is a systematic process that includes the following steps:   1. Identification and Inventory of Resources This involves: Surveying and mapping resources Identifying their type, quality, and quantity Example: Mapping mineral-rich…

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Power Sharing
21 Mar 2026

Class 10 CIVICS Chapter-1 Power Sharing | NOTES

INTRO – POWER SHARING In a democratic country, power should not remain in the hands of only one person or one group. Power sharing means the distribution of power among different organs of government and among different groups of society so that everyone gets a fair chance to participate in decision-making. In simple words, power sharing ensures that no one becomes too powerful and everyone’s voice is heard. It is considered the very spirit of democracy. Power sharing is important because it helps in maintaining peace, equality and stability in a country. When power is shared properly, it reduces conflicts between different social groups. Power sharing is the basic principle of democracy. A democratic government works on the idea that people are the real source of power. Therefore, power must be shared among: Legislature (makes laws) Executive (implements laws) Judiciary (interprets laws) People (through elections) This ensures that democracy remains fair and accountable. The chapter begins with examples showing how power sharing can either solve problems or create conflicts if not handled properly. This shows that power sharing is not just a theory but a practical necessity for peaceful coexistence. After completing these notes, test your understanding by practicing important MCQ questions. Practice MCQs EXAMPLE OF BELGIUM Belgium is a small country in Europe, but it provides a very important example of how power sharing can help maintain peace in a diverse society. Despite having differences in language and culture, Belgium managed to avoid major conflicts by adopting a smart power-sharing arrangement. This example teaches us that diversity can become a strength if power is shared wisely.     *Social Composition of Belgium Belgium has a very diverse population divided mainly on the basis of language. The main groups are: Dutch-speaking community (Flemish)About 59% of the population lives in the Flemish region and speaks Dutch. This group forms the majority in the country. French-speaking communityAround 40% of the population speaks French and lives mainly in the Wallonia region. German-speaking minorityAbout 1% of the population speaks German. Though small in number, their rights are also protected in the power-sharing system. Special case of the capital cityThe capital city Brussels has a different composition: Around 80% French-speaking Around 20% Dutch-speaking This was a sensitive issue because the Dutch-speaking people were the majority in the country but a minority in the capital.     *The Problem Faced by Belgium During the 1950s and 1960s, tensions started growing between the Dutch-speaking and French-speaking communities. The French-speaking community was relatively richer and more powerful, which made the Dutch-speaking community feel neglected. This situation could have led to serious conflict if power was not shared properly.     # Real-life connection Just like in a classroom, if only a few students always get leadership roles, others may feel ignored. But if responsibilities are distributed fairly, the environment becomes cooperative.     *Belgium’s Power Sharing Arrangement Belgium solved its problem by adopting a carefully designed power-sharing model. Some important features of this arrangement are: Equal representation in the central governmentThe constitution states that the number of Dutch and French-speaking ministers must be equal in the central government.This ensures that no single community can dominate decision-making. Special laws require support from both groupsSome important laws can be passed only when a majority from each linguistic group supports them.This prevents one group from forcing decisions on the other. State governments were given powersMany powers were given to state governments of different regions. These governments are not controlled by the central government in their areas of authority. Community government systemBelgium also created a community government elected by people belonging to one language community.This government looks after cultural, educational and language-related issues. # Example: Decisions related to language in schools or cultural programs are taken by community governments.     *Why Belgium Model is Considered Successful? Belgium’s model is considered successful because it helped in: Avoiding civil conflict Maintaining unity despite diversity Protecting minority rights Ensuring political stability   *Democracy connection This shows that democracy is not just about majority rule, but also about respecting minority rights.     *Conclusion Belgium shows that power sharing is the best way to manage diversity in a democracy. Instead of allowing conflicts to grow, Belgium chose cooperation and mutual respect. Belgium proves that sharing power is the smartest way to maintain unity in a diverse country. Strengthen your understanding of the Belgium case – Practice Topic-wise Question Answers here. Belgium Related Important Question Answers EXAMPLE OF SRI LANKA Sri Lanka is an island country located near India. It presents an example of how the absence of power sharing can lead to conflicts and tensions in society. Unlike Belgium, Sri Lanka did not initially adopt proper power-sharing policies, which resulted in disputes between different communities. This example helps students understand why power sharing is necessary in a democracy.   *Social Composition of Sri Lanka Sri Lanka also has a diverse population mainly divided on the basis of language and religion: Sinhala-speaking community (Majority)About 74% of the population are Sinhala speakers. Most of them follow Buddhism and form the majority community. Tamil-speaking community (Minority)About 18% of the population are Tamils. They are divided into: Sri Lankan Tamils (native residents) Indian Tamils (whose ancestors came from India during British rule) Religious diversity Sinhala community → Mostly Buddhists Tamil community → Mostly Hindus or Muslims This diversity required careful power sharing, but it was not handled properly.   *Majoritarianism in Sri Lanka After independence in 1948, the leaders of Sri Lanka followed a policy of majoritarianism, which means giving preference to the majority community in governance. Some important steps taken by the government were: Sinhala declared as the only official language (1956)The government passed an Act declaring Sinhala as the only official language, ignoring Tamil.This made Tamil speakers feel excluded in jobs and administration. Preference to BuddhismThe constitution gave special protection to Buddhism. This made other religious groups feel that they were not treated equally. Preference in jobs and educationGovernment policies favoured Sinhala applicants in university admissions…

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Environment
22 Feb 2026

CLASS 10 Science Chapter- OUR ENVIRONMENT | NOTES

INTRODUCTION: ENVIRONMENT The environment includes everything that surrounds us and has an impact on our lives, whether directly or indirectly. It includes live species like plants, animals, and humans, as well as non-living elements like air, water, soil, sunlight, and temperature. All of these components are interrelated, resulting in a balanced system that supports life on Earth. Humans are an essential part of the ecosystem. However, the ecosystem is suffering as a result of fast population expansion, industrialization, urbanization, and abuse of natural resources. To comprehend these difficulties and discover answers, it is critical to learn the concepts of environment and ecosystems. ECOSYSTEM An ecosystem is a self-sustaining functional unit of nature in which living organisms (plants, animals, and microorganisms) interact with one another and with the non-living components (air, water, soil, light, and temperature) of their environment through energy flow and nutrient cycling. These interactions ensure the flow of energy and the cycling of nutrients, making life possible on Earth. In simple words, an ecosystem includes plants, animals, microorganisms, and their physical environment working together as a system. *DIFFERENCE BETWEEN ENVIRONMENT AND ECOSYSTEM The terms environment and ecosystem are frequently used together, however they do not refer to the same thing. Both are closely similar ideas in the chapter Our Environment, but they have different scopes, structures, and functions. Environment: The environment refers to the entire surroundings in which living organisms exist. It includes all living and non-living components that affect life on Earth. Ecosystem: An ecosystem is a specific functional unit of the environment where living organisms interact with each other and with non-living components through energy flow and nutrient cycling. Basis Environment Ecosystem Meaning Surroundings in which organisms live Functional unit of interaction between living and non-living components Scope Broad and extensive Limited and specific Interaction Interaction may or may not be direct Interaction is always present Structure Includes many ecosystems Part of the environment Focus Overall conditions affecting life Energy flow and nutrient cycling Example Earth, atmosphere Pond, forest, aquarium # Environment is the whole, and ecosystem is a part of it. TYPES OF ECOSYSTEM Based on their origin and characteristics, ecosystems are broadly classified into natural ecosystems and artificial ecosystems. 1. Natural Ecosystem A natural ecosystem is formed by nature without any human intervention. These ecosystems are self-regulating and maintain balance through natural processes such as food chains, energy flow, and nutrient cycling. Natural ecosystems are further divided into terrestrial and aquatic ecosystems. 2. Artificial Ecosystem An artificial ecosystem is created and maintained by humans to fulfill specific needs. These ecosystems depend heavily on human care and management and cannot sustain themselves naturally for a long time. Examples of artificial ecosystems include crop fields, gardens, parks, and aquariums. In a crop field, humans decide which plants to grow, provide water and fertilizers, and control pests. Although artificial ecosystems are productive, they usually have low biodiversity compared to natural ecosystems. TYPES OF ORGANISMS Living species in an ecosystem perform various jobs depending on how they gather energy and nutrients. These organisms are generically classed as producers, consumers, and decomposers. Each species of organism has a distinct purpose, and together they maintain the efficient flow of energy and nutrient recycling in the ecosystem. 1. PRODUCRS Producers are organisms that can produce their own food from simple inorganic substances. They prepare food by photosynthesis, which uses sunlight, carbon dioxide, and water. Because they produce food for themselves and other organisms, they are the base of all ecosystems. Green plants are the most common producers. In aquatic ecosystems, algae and phytoplankton serve as producers. Some bacteria can also produce food using chemical energy, a process known as chemosynthesis. Producers are important because they: 2. CONSUMERS Consumers are organisms that are unable to produce their own food and therefore rely on other organisms for energy. They receive their food either directly from plants or indirectly from animals. Some consumers live on or inside other species and get sustenance from them. Consumers are further segmented according to their feeding habits. a) Herbivores (Primary Consumers): These organisms feed directly on plants. Examples include deer, cow, goat, and rabbit. They form the second level of the food chain. b) Carnivores (Secondary and Tertiary Consumers): Carnivores feed on other animals. Animals like frogs and lizards are secondary consumers, while lions, tigers, and eagles are top consumers. c) Omnivores: Omnivores feed on both plants and animals. Human beings, bears, and crows are common examples. d) Parasites: Parasites are organisms that live on or inside another organism (host) and obtain food from it, usually harming the host. Examples include tapeworms, lice, ticks, and leeches. Parasites are considered consumers because they depend entirely on other organisms for nutrition. Consumers are important because they help in: 3. DECOMPOSERS Decomposers are organisms that break down dead plants, animals, and organic waste into simpler substances. Bacteria and fungi are the main decomposers in an ecosystem. Decomposers are important because: Without decomposers, nutrients would remain locked in dead organisms, and the ecosystem would collapse. FOOD CHAIN All living organisms require food in order to exist, grow, and carry out life activities. However, no organism lives in isolation. Everyone depends on others for food, either directly or indirectly. The transfer of food and energy from one organism to another creates a food chain. A food chain is a linear sequence of organisms through which food and energy pass as one organism eats another. It shows who eats whom in an ecosystem and explains the movement of energy from producers to consumers. In every food chain, energy flows in one direction only, starting from the Sun and ending with top consumers. Example of a Food Chain A common example of a food chain is: Grass → Deer → Lion In this chain: This simple chain shows how energy moves from plants to animals. *Types of Food Chains Food chains can be of different types depending on the source of energy. 1. Grazing Food Chain: This food chain starts with green plants and…

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Chemical
18 Feb 2026

Class 10 CHEMISTRY Chapter-1 Chemical Reaction and Equation | SHORT NOTES

Download Pdf (Link given below) PHYSICAL CHANGE & CHEMICAL CHANGE Basis Physical Change Chemical Change New substance Not formed Formed Type of change Physical properties change Chemical composition changes State/appearance Size, shape or state changes Entire nature of substance changes Reversibility  reversible irreversible Chemical reaction Not a chemical reaction It is a chemical reaction Energy change Very less energy change Energy absorbed or released Chemical bonds No bond breaking or formation Bonds break and new bonds form Mass Mass remains same Mass conserved (reactants = products) Effect on properties No new properties New properties appear Example Melting of ice Rusting of iron CHEMICAL REACTION Process in which new substance are formed with new chemical (may be physical also), is/are formed, is called chemical reaction. *CHARACTERISTISTICS OF CHEMICAL REACTION 1. Evolution of Gas 2. Formation of Precipitate 3. Change in Temperature 4. Change in State 5. Change in Colour DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE LAW OF CONSERVATION OF MASS – Given by Lavoisier in 1774 – It states that: MAKING EQUATIONMORE INFORMATIVE 1. Indicating “Physical State” 2. Indicating heat changes (+heat) 3. Indicating the conditions TYPES OF CHEMICAL REACTION 1. Combination Reaction (A + B = AB) 2. Decomposition Reaction (AB = A + B) #Types of Decomposition Reaction 1)Thermal Decomposition 2)Electro Decomposition 3)Photo Decomposition 3. Displacement Reaction (A + BC = AC + B) More reactive displaces less reactive #Reactivity Series: It is a series in which metals arranged in decreasing order of their reactivities on moving from top to bottom. Trick to Learn: Kaka Nana Chaat Mange Aloo Zara Feke Pade Hai CHAAP. METAL NAME (Reactivity decreases as we move down) Kaka – K (Potassium) Nana – Na (Sodium) Chaat – Ca (calcium) Mange – Mg (Magnesium) Aloo – Al (Aluminium) Zara – Zn (Zinc) Feke – Fe (Iron) Pade – Pb (lead) Hai – H (Hydrogen) C – Cu (Copper) H – Hg (Mercury) A – Ag (Silver) A – Au (Gold) P – Pt (Platinium) Example: 4. Double Displacement Reaction (AB + CD = AC +BD) A reaction in which exchange of ions takes place between two compounds. 5. Redox Reaction A reaction in which oxidation and reduction take place simultaneously. *Reduction: Adding H₂ OR Removing O₂ OR Both *Oxidation: Adding O₂ OR Removing H₂ OR Both DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE EFFECTS OF OXIDATION ON EVERYDAY LIFE 1) CORROSION: Process of slowing eating up of metals due to their conversion into oxides, carbonates, etc by the action of air. *Prevention from Corrosion: 2) RANCIDITY: Fats and Oil present in food get oxidized. *Prevention: IMPORTANT EXPERIMENTS 1) BURNING OF MAGNESIUM 2) CASE OF WHITE WASHING Substance – Calcium Oxide (CaO) * Formation of Slaked Lime When quicklime reacts with water, slaked lime is formed: CaO + H₂O → Ca(OH)₂ This reaction is exothermic (heat is released). * Reaction during Whitewashing When slaked lime is applied on walls, it reacts slowly with carbon dioxide from the air to form calcium carbonate: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O 3) TEST FOR H₂ GAS 4) IRON NAILS IN COPPER SULPHATE SOLUTION 5) RUSTING IS FASTER IN COASTAL AREAS DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE Explore other chapter’s NOTES – CLICK HERE or visit Gyanora.in For Practicing chapter wise question answers – CLICK HERE or visit QnA.Gyanora.in Follow us on: YouTube: www.youtube.com/@Gyanora Telegram: t.me/gyanora Instagram: https://www.instagram.com/gyan_ora?igsh=aDQxbDk1aDdleHJ6

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Print
30 Jan 2026

SHORT NOTES | Class 10 HISTORY Chapter-5 Print Culture and Modern World | REVISION NOTES

Download Pdf (Link given below) PRINT IN CHINA *HUGE DEMAND OF BOOKS IN CHINA i. Demand for Civil Services Examination. Only people who were preparing for this exam, would demand for books. ii. By 17th Century, dur to growing Urban Culture, use of print expanded. iii. Books like – Fictional Books, and Romantic Plays – were in demand. iv. Women also become Reader as well as publisher of books. # SHANGHAI – become hub of Western Style School of Printing PRINT IN JAPAN *IMPORTANT INFORMATION i. By 13-15 century, diversification of Print in Japan was started. ii. Books were printed in huge quantity which make them cheaper. iii. KITAGAWA UTAMARO – He is famous for his Art called UKIYO # EDO (TOKYO) – become hub of printing in Japan PRINT IN KOREA Famous book of Korea – JIKJI About JIKJI PRINT COMES TO EUROPE Chinese Paper reached Europe Via SILK ROUTE. But Print was not famous in Europe. *For Ordinary People – Wood Block Printing Books were available, as they were cheap. *For Rich People – Books made with VELLUM, which is most expensive.     >> VELLUM – a high quality, smooth printing surface made from scrapped animal skin. GUTENBERG AND THE PRINTING PRESS THE PRINT REVOLUTION Aspect Before the Print Revolution After the Print Revolution Production of books Books were handwritten by scribes, so production was slow. Books were printed using printing presses, increasing speed. Cost of books Books were very expensive and affordable only to the rich. Printed books became cheaper and affordable for many people. Availability Very few books were available due to manual copying. Large numbers of books were produced and widely available. Access to knowledge Knowledge was limited to elites, clergy and scholars. Knowledge reached common people, students and workers. Literacy level Literacy rate was low due to lack of books. Literacy increased as books became easily available. Language used Most books were written in Latin. Books were printed in vernacular (local) languages. Spread of ideas New ideas spread slowly from person to person. Ideas spread quickly through books, pamphlets and newspapers. Education Education was limited and not widespread. Education expanded with textbooks and printed material. Social impact There was little discussion or public debate. Public opinion developed and debates increased. IMPACT OF PRINT REVOLUTION 1. EMERGENCE OF NEW READER 2. RELIGIOUS DEBATES AND FEAR OF PRINT 3. PRINT AND DISSENT READING MANIA It refers to dramatic surge in literacy and demand for books, driven by rising education rates and cheap, accessible printed materials. *Effects of Reading Mania DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE POWER OF PRINT PRINT CULTURE AND THE FRENCH REVOLUTION “Print culture created the conditions within which French Revolution occurred” Suitable Arguments: 19th CENTURY 1. CHILDREN 2. WOMEN 3. WORKERS FURTHER INNOVATIONS IN PRINTING 1. Power-Driven Cylindrical press 2. Offset press 3. Photoelectric Controllers 4. Dust Cover / Book Jacket DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE INDIA AND THE WORLD OF PRINT *PRINT COMES TO INDIA *RELIGIOUS REFORM AND PUBLIC DEBATES *NEW FORM OF PUBLICATION Visual Culture – by Raja Ravi Verma *WOMEN AND PRINT *POOR AND PRINT *PRINT AND CENSORSHIP DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE Explore other chapter’s NOTES – CLICK HERE or visit Gyanora.in For Practicing chapter wise question answers – CLICK HERE or visit QnA.Gyanora.in Follow us on: YouTube: www.youtube.com/@Gyanora Telegram: t.me/gyanora Instagram: https://www.instagram.com/gyan_ora?igsh=aDQxbDk1aDdleHJ6

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heredity
18 Dec 2025

HEREDITY NOTES Class 10 Science (Biology)

HEREDITY Heredity is a biological process through which parents pass their characteristics to their children. Every living organism, whether a plant, animal, or human, inherits traits from its previous generations. It explains why we share similarities with our family — such as facial features, height, voice, or even certain habits. Heredity is controlled by genes, which are tiny units of information present inside our cells. Because of heredity, the continuity of characteristics is maintained in a species, meaning that the next generation shares many common characteristics with the previous one. VARIATION The process of heredity also brings variations, so even though we resemble our parents, we are not exact copies of them. Variation means the differences in traits or characteristics among individuals of the same species. *Importance of Variation Variations are essential because they: TRAITS Traits are the specific characteristics or features of an organism. They decide how an organism looks, behaves, or functions. Each trait is determined by a pair of genes. Examples: Eye colour, height, hair type, skin colour, blood group, etc. *Difference Between Inherited Traits and Acquired Traits Basis Inherited Traits Acquired Traits Meaning Traits that are passed from parents to offspring through genes. Traits that an organism develops during its lifetime due to environment or experience. Cause Caused by genetic information (DNA). Caused by environment, habits, lifestyle, training, etc. Present From Birth Yes, inherited traits are present from birth. No, they develop after birth. Transfer to Next Generation Yes, inherited traits can be passed to offspring. No, acquired traits are not passed to offspring. Examples Eye colour, hair type, height tendency, blood group. Learning to swim, bodybuilding, scars, tanning of skin. Role in Evolution Play a major role in evolution as they are heritable. Play little or no role in evolution because they aren’t inherited. Based On Genes and alleles. Environment and personal experience. Controlled By Genes on chromosomes. External factors and lifestyle. SOME IMPORTANT TERMS DNA DNA stands for Deoxyribonucleic Acid. DNA is the chemical substance present in the nucleus of every cell. It is a double stranded thread like structure. DNA carries all genetic information that decides the traits of an organism. DNA is made up of – Sugar, Phosphate, and Nitrogenous Bases. It passes from one generation to another. Chromatin and Chromosomes When DNA is in scattered form – this structure is called Chromatin. At the time of Cell Division, Chromatin get condensed. This structure of DNA is called Chromosomes. Basis Chromatin Chromosomes Definition Long, thin, thread-like structure made of DNA and proteins. Condensed, thick, rod-like structure formed from chromatin. Appearance Looks like loose threads. Looks like thick rods. Visibility Not visible clearly under a microscope. Clearly visible during cell division. State of Cell Present in non-dividing cells. Present during cell division (mitosis/meiosis). Structure Uncoiled and extended. Highly coiled and condensed. Function Allows gene expression, DNA replication, and packaging. Ensures accurate distribution of DNA to daughter cells. Composition DNA + proteins (histones). Tightly packed chromatin fibres. Genes Genes are present but loosely arranged. Genes are arranged in a fixed order along chromosome arms. *Chromosome Number – Chromosome number helps in maintaining genetic stability across generations. – Humans have 46 chromosomes (arranged in 23 pairs) – Out of these: – All Cells of Human body are Diploid except Gametes. – Gametes (sperm cell and egg cell) are Haploid Cells. HAPLOID AND DIPLOID A living organism’s cells have a set number of chromosomes. This number determines whether a cell is haploid (n) or diploid (2n). *Haploid *Diploid GENES A gene is a unit of heredity composed of DNA that regulates the expression of a specific trait in an organism. Genes are hereditary units on chromosomes that contain coded information (DNA instructions) for protein production, which determines an organism’s traits and characteristics. In simple words, Genes are small segments of DNA that carry information for a specific trait and are passed from parents to their children. A gene is basically a set of instructions that tells the body how to acquire a particular trait (such as eye color, height, hair type, and so on). Genes are found inside the nucleus of every cell and sit on chromosomes in a fixed, specific position called a locus. Humans have 20,000 to 25,000 genes approximately. These are spread across 23 pairs of chromosomes. ALLELES In genetics, every trait in our body is controlled by two types of a gene called alleles—one inherited from the mother and the other from the father. Allele is an alternative version or form of a gene. These are different variants of a gene that share the same location (locus) on homologous chromosomes. They are paired versions of a gene inherited from parents, with each allele carrying slightly different information, resulting in the formation of distinct features such as eye color, height, or hair type. We have alleles because we inherit one chromosome from our mother and one from our father, and the genes on them are also paired. Genes are the traits, whereas Alleles are Variations of the trait. Difference Between Genes and Alleles Basis Genes Alleles Meaning A gene is a unit of heredity that controls a specific trait. Alleles are different forms or versions of the same gene. Role Determines a particular character (like eye colour). Determines the different expressions of that character (brown/blue eyes). Count Each trait has one gene. Each gene exists in two allelic forms (one from each parent). Location Found at a fixed position on chromosomes. Found at the same position (locus) on homologous chromosomes. Examples Gene for eye colour, gene for height. B & b (brown and blue eye alleles), T & t (tall and short alleles). Nature General information-carrying unit. Specific variations of that information. Function Controls basic development of traits. Controls which form of the trait will be expressed. Dominant Allele Dominant Allele is the stronger one from the two Alleles. It is the stronger form of a gene that expresses its trait even if only one copy is present. It is always written…

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democracy
12 Dec 2025

Outcomes of Democracy NOTES Class 10 Civics

INTRO – OUTCOMES OF DEMOCRACY Democracy is not just a term; it is a promise. A promise of liberty, equality, and a government that is responsive to its citizens. Democracy is widely regarded as the most trustworthy form of government. But have you ever thought why we have such high expectations from it? HOW DO WE ASSESS OUTCOMES OF DEMOCRACY Assessing democracy is like checking the “report card” of a country. We know that democracy is popular over the world, but to determine whether it is actually successful, we must look at how it works in reality rather than just what it promises. 1. Democracy is judged by its actual performance 2. People have different expectations from democracy 3. Democracy must be assessed collectively, not individually 4. Democracy involves a long and complex decision-making process 5. We need proper criteria to judge democracy 6. Democracy allows room for correction ACCOUNTABLE, RESPONSIVE, AND LEGITIMATE GOVERNMENT One of the most important outcomes of democracy is that it aims to create a government that is accountable, responsive, and legitimate. *Democracy Ensures an Accountable Government *Democracy Works as a Responsive Government *Democracy Provides a Legitimate Government ————————————————————————————————– *Case Study from NCERT: Transparency The cartoon shows a very large telescope pointed from the government’s side towards the public. “A strong democracy requires transparency—citizens should know as much about the government as the government knows about them.” This cartoon perfectly explains an important idea from the chapter “Outcomes of Democracy”—that in a democracy, the government must be open, transparent, and answerable to the people. However, the cartoon shows the opposite situation. – On the left, the government is using a big, powerful telescope to watch the public. – On the right, the public is trying to look at the government through a tiny lens. The cartoon shows that transparency is weak, making accountability weaker too.If people cannot see what the government is doing, they cannot question it—this goes against democratic values. ——————————————————————————————- ECONOMIC GROWTH AND DEVELOPMENT IN DEMOCRACY From 1950 to 2000, economic growth in many democracies faced ups and downs. In Contrast, several Dictatorships show high economic growth during this period, due to centralized decision-making and control over resources. Democracy does not guarantee the fastest growth, but it ensures more stable and secure growth. Even if growth is not very high, democracy provides: —————————————————————————————— *CASE STUDY ON ECONOMIC GAIN AND INCOME DISTRIBUTION GAIN 2000-2006 “The cartoon shows that economic growth made the rich stronger, while the middle class gained little and the poor gained almost nothing.” Strong upper body = Rich peopleThe rich have become stronger and richer. They gained the most from economic growth. Thin middle body = Middle classThe middle class got some benefits, but not much. Their income didn’t increase very significantly. Weak legs = Poor peopleThe poor remain weak. They hardly got any benefit from growth. -The cartoon highlights unequal distribution of economic growth: -This problem is called income inequality. ——————————————————————————– REDUCTION OF INEQUALITY AND POVERTY Democracy aims not only to grant citizens the right to vote, but also to ensure that everyone has equal possibilities in life. One of the most important effects of democracy is an effort to minimize inequality and poverty, which makes society more just and equitable. INEQUALITY: Inequality refers to the unequal distribution of wealth, resources, and opportunities among individuals. For example, some individuals have access to better education, jobs, and opportunities than others. POVERTY: Poverty is defined as a lack of resources to meet basic human requirements such as food, health, education, and housing. The poor frequently have limited options to earn and improve their life. *How Democracy Works to Reduce Inequality Democracy promotes not just political equality, but also social and economic equality. (a) Equal Rights for All (b) Policies to Support Weaker Sections (c) Government Accountability (d) Welfare Programs (e) Employment Opportunities Programs that create jobs for those with low income, such as – Rural employment schemes, Skill development programs, and Support for small businesses and self-employment (f) Access to Basic Services —————————————————————————————- *Case Study on – “Voice of the Poor” The image shows a poor person standing still in worn-out, patched clothing. This cartoon shows a basic drawback of democracy – even though democracies promise equality and justice, poor people are sometimes sidelined. – The cartoon suggests that: ————————————————————————————— *Case Study on – “World’s Wealth Owned by a Few” This powerful illustration highlights one of the major challenges democracies face—economic inequality. The graphic provides a remarkable visual of how wealth is distributed unequally around the world. The cartoon shows an extremely wealthy man taking over half of the world’s wealth, while a much smaller and weaker individual receives only a small share. This cartoon shows: From this, We can conclude that economic inequality can create dissatisfaction and weaken democratic values if not addressed. ———————————————————————————— ACCOMMODATION OF SOCIAL DIVERSITY Social diversity refers to the different social groups that exist in a society based on religion, language, caste, culture, geography, or ethnicity. One of democracy’s greatest strengths is its ability to recognize social differences and establish a framework in which diverse groups can coexist peacefully. Rather than imposing “one uniform culture,” democracy seeks to accommodate many communities. *Features of Accommodation in a Democracy 1. Majority Rule Cannot Mean Rule by One Community 2. Democracy Encourages Mutual Respect 3. Power Sharing Helps Reduce Conflicts 4. Diversity is Seen as a Strength, not a Problem DIGNITY AND FREEDOM OF CITIZENS Dignity means self-respect, feeling appreciated, and being regarded as an equal human being. Democracy provides dignity by guaranteeing that every person is valued, regardless of caste, religion, gender, or economic status. Dignity is important because – it allows people to live with respect, protects individuals from humiliation and discrimination, and gives citizens the confidence to participate in public life freely. There are the following ways by which democracy Protects Dignity & Freedom: 1. Equality Before the Law 2. Fundamental Rights Guarantee Freedom 3. Government is Accountable to the People 4. Protection of Minority Rights 5. Freedom to Raise…

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Marginalisation
29 Nov 2025

CLASS 8 CIVICS Chapter-5 Understanding Marginalisation | NOTES

INTRO – MARGINALISATION Marginalisation is the process by which certain individuals or groups are denied major participation in social, economic, political, and cultural life. These groups are frequently denied access to authority and decision-making, which contributes to structural disadvantage and inequality. *Marginalisation V/s Marginalised – Marginalisation:  Marginalisation is the process. It means pushing a group of people to the edge of society, where they do not get equal rights, opportunities, or respect.So, marginalisation is the action or the situation that creates inequality. – Marginalised: It is an individual or a group. Marginalised refers to the people who are affected by marginalisation.These are the communities who are left out, ignored, or treated unfairly in society.So, marginalised are the individuals or groups who experience the effects of marginalisation. CAUSES OF MARGINALISATION 1. Historical Inequality 2. Social Discrimination 3. Lack of Education 4. Economic Problems 5. Cultural Differences 6. Political Exclusion 7. Stereotypes 8. Loss of Land and Resources MARGINALISED SECTIONS OF OUR SOCIETY THE ADIVASIS “Adivasi” means original inhabitants. Adivasis are one of the most important and diverse communities of India. They are known as the original or indigenous people of our country. India has more than 500 Adivasi groups. They comprise of around 8% of India’s population. The legal term used by the Indian government for Adivasis is Scheduled Tribes. Adivasis have a deep connection with forests, wildlife, rivers, and land. Their entire lifestyle revolves around nature, which they respect and protect. They have – Distinct languages, Colorful festivals, Traditional music and dance, Unique food habits, Strong community bonds. *Why Are Adivasis Marginalised? *Stereotyping the Adivasis – A stereotype is a generalized belief about a particular category of people. It ignores the real diversity and individuality of the community. – Many people wrongly believe that Adivasis are – Backward, Uneducated, Uncivilised, always living in forests, and Unwilling to change or modernise. – Why Are These Stereotypes Wrong? *Displacement of Adivasis Displacement means forcing people to leave their home or land and move somewhere else, usually because of reasons like construction projects, natural disasters, mining, or conflicts. – Causes of Displacement of Adivasis – Effects of Displacement on Adivasis MINORITIES AND MARGINALISATION A minority is a group that is smaller in population, culture, or language compared to others. In India, religious minorities include – Muslims, Christians, Sikhs, Buddhists, Jains, Parsis. – Why Do Minorities Face Marginalisation? MUSLIMS AND MARGINALISATION According to 2001 census, Muslims are 13.4 per cent of India’s population and are considered to be a marginalised community in India. *Reasons that show Muslims Considered a Marginalised Community 1. Lower Literacy Levels 2. Limited Access to Good Jobs

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Pastoralists
24 Nov 2025

CLASS 9 HISTORY Chapter- Pastoralists in the Modern World | NOTES

PASTORALISTS Pastoralists are communities who move from place to place with their herds of animals like cattle, sheep, goats, camels, and yaks. Their lifestyle is also known as nomadic pastoralism. Their movement is not random — they follow a seasonal cycle, shifting to areas where fresh grass and water are available. This constant movement is called transhumance. PASTORAL NOMADS AND THEIR MOVEMENTS *In the Mountain Mountain regions in India are home to several pastoral communities. Their entire lifestyle revolves around the seasonal movement of people and animals in search of fresh grazing grounds. Pastoralists in the mountains cannot stay in one place throughout the year because of the following reasons: Therefore, mountain pastoralists move upwards in summer and downwards in winter. 1. The Gujjar-Bakarwals of Jammu & Kashmir 2. The Gaddi Shepherds of Himachal Pradesh 3. The Bhotiyas, Sherpas and Kinnauri *On the Plateaus, Plains & Deserts Pastoral communities are not found only in the mountains.Large groups live in the Deccan plateau, the plains of north India, and the hot deserts of Rajasthan. Just like mountain herders, they too depend on seasonal changes, monsoon cycles, and availability of water and grass. 1. In the Plateaus – The Dhangars of Maharashtra 2. In the Plains – Pastoralists of Punjab, Haryana & Western UP 3. In the Deserts – The Raikas of Rajasthan COLONIAL RULE AND PASTORALISTS’ LIFE Before British rule, pastoralists moved freely with their herds across forests, plains, mountains, and deserts.But when the colonial government took control, their lifestyle changed completely. *Major Changes faced by pastoralists: *How Did the Pastoralists Cope with These Changes? PASTORALISM IN AFRICA Africa has the highest number of pastoralists in the world. The majority of the continent has dry terrain, seasonal rainfall, and little vegetation, giving pastoralism an important way of life. Some well-known Pastoral Groups of Africa include: They rear animals such as cattle, goats, camels, sheep, and depend on them for food, trade, and survival. *The Maasai: A Well-Known Pastoral Community The Maasai of Kenya and Tanzania are one of the most famous pastoral groups in the world. Traditional Life of the Maasai: Impact of Colonial Rule on the Maasai:

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adolescence
24 Nov 2025

CLASS 8 SCIENCE Chapter- ENDOCRINE SYSTEM AND ADOLESCENCE | NOTES

INTRO – ENDOCRINE SYSTEM AND ADOLESCENCE Adolescence is one of the most exciting phases of life. It usually begins around 10–12 years and continues till 18–19 years. During these years, you may notice many things happening at the same time. The endocrine system is a network of glands that produce hormones — special chemicals that act like tiny messengers. These hormones travel in your blood and tell different parts of your body when to grow, how to develop, and how to feel. Endocrine system = Glands + Hormones The Endocrine System is the body’s internal communication network, and adolescence is the time when this network becomes super active. HORMONES AND ENDOCRINE GLAND *What Are Glands Glands are special organs in our body that make and release various chemical substances.These chemicals help the body grow, stay healthy, digest food, control temperature, and even fight stress. There are two main types of glands: 1. Exocrine Glands – The Ones with Ducts 2. Endocrine Glands – The Ductless Ones *what are Hormones Hormones are chemical messengers made by endocrine glands. They travel through blood and control almost every activity in the body. *Major Endocrine Glands and Their Hormones 1) Pituitary Gland – “The Master Gland” 2) Thyroid Gland – Body’s Energy Manager 3) Adrenal Glands – “Emergency Responders” 4) Pancreas – Blood Sugar Controller 5) Reproductive Glands – Puberty Controllers     –Testes (in boys)      –Ovaries (in girls) PUBERTY Puberty marks the biological start of adolescence. It is the phase when the body becomes capable of reproduction and starts developing new characteristics. Girls usually begin puberty between 10–14 years Boys usually begin puberty between 11–15 years Hormones play the main role in triggering all changes of puberty. *The various changes which occur in boys during puberty: *The various changes which occur in girls during puberty: *Changes in Reproductive Organs As puberty begins, the reproductive organs finally mature and become fully functional. This happens due to hormonal changes controlled by the pituitary gland. – In Boys –In Girls *Menstrual Cycle (28-Day Cycle) If the egg is not fertilized, both the egg and the thick uterine lining are shed from the body. This flow of blood and tissue is called menstruation. The human menstrual cycle has four phases: Phase 1: Menstruation (Day 1–4) Phase 2: Follicular Phase (Day 5–12) Phase 3: Ovulation (Day 13–14) Phase 4: Luteal Phase (Day 15–28) #Menarche: First menstrual flow (usually at the start of adolescence). #Menopause: Menstrual cycle stops permanently (around age 45–50). *Determination of the Sex of the Baby Humans have 23 pairs (46 total) chromosomes. Out of these, 22 pairs are normal body chromosomes. The 23rd pair is called the sex chromosomes because they decide whether the baby will be a boy or girl. Girls have XX chromosomes, while boys have XY chromosomes. In humans, the mother’s egg always carries only one type of sex chromosome – X. However, the father’s sperms are of two types: some carry X, and some carry Y. This difference plays the main role in deciding the baby’s sex. X (egg) + X (sperm) = XX → Girl baby X (egg) + Y (sperm) = XY → Boy baby Therefore, the sex of the baby depends completely on which sperm reaches the egg first — the X-sperm or the Y-sperm. This means the father determines the sex of the baby, not the mother. *Emotional Changes at Puberty During adolescence, hormones affect not only the body but also the mind. Common emotional changes: NUTRITIONAL REQUIREMENTS DURING ADOLESCENCE Good food is not just fuel—it’s the building block of a strong and confident future. During adolescence, the body needs: *Essential Nutrients Needed by Adolescents PERSONAL HYGIENE DURING ADOLESCENCE During Adolescence, the body becomes more prone to sweat, oiliness, skin problems, and infections. That’s why maintaining personal hygiene is extremely important. Cleanliness during adolescence keeps the body healthy, boosts confidence, and prevents diseases. *Essential Personal Hygiene Habits During Adolescence PHYSICAL FITNESS DURING ADOLESCENCE Physical fitness means the ability of the body to perform daily activities without getting tired easily and with strength, stamina, and flexibility. It keeps both the body and mind strong during the rapid growth of adolescence. A physically fit adolescent can handle daily tasks effortlessly, think clearly, and stay confident. *How Adolescents Can Stay Physically Fit DRUG ABUSE AND AIDS *Drug Abuse Drug abuse means misusing harmful substances such as tobacco, alcohol, or other addictive drugs. These substances affect the brain, damage the body, and can create lifelong health problems. The harmful Effects of Drug Abuse are as follow: *AIDS AIDS stands for Acquired Immuno Deficiency Syndrome. It is caused by a virus called HIV (Human Immunodeficiency Virus). HIV attacks the body’s immune system, making it difficult to fight infections. A person with AIDS becomes weak and easily gets sick because the body’s defence system is damaged. HIV spreads through specific ways – Unprotected sexual contact, Sharing infected needles or syringes, Transfusion of infected blood. It is NOT spread through – Touching, hugging, or shaking hands, Sharing food or water, Mosquito bites, Sitting in the same classroom.

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