Our Environment Class 10 Notes PDF

Introductio Environment refers to the surrounding of an organism where it thrives. It constitutes both living and non-living things, i.e. physical, chemical and biotic factors. Here, in this chapter, we will learn about various components of the environment, their interactions and how our activities...

Introductio Environment refers to the surrounding of an organism where it thrives. It constitutes both living and non-living things, i.e. physical, chemical and biotic factors. Here, in this chapter, we will learn about various components of the environment, their interactions and how our activities affect the environment Ecosyste The ecosystem comprises all the biotic and abiotic factors interacting with one another in a given area. Biotic components include all living organisms such as plants, animals, microorganisms and humans, etc. and abiotic components include sunlight, temperature, air, wind, rainfall, soil and minerals, etc. E.g. pond ecosystem, grassland ecosystem, etc Mode of nutrition in animals and plant Autotrophic and Heterotrophic are the two modes of nutrition in living organisms. Plants and some bacteria are autotrophic as they make their own food. Animals, fungi and some bacteria are heterotrophic as they derive their food from other organisms Read more: Difference between Autotrophs and Heterotrophs m n. s..  Saprophytes and decomposer Saprophytes feed on dead and decaying material, e.g. fungi and microorganisms. They absorb nutrients from dead and decaying plants and animal parts. Decomposers break down the organic matter or waste material and release nutrients into the soil. For example, bacteria, worms, slugs, and snails. They are considered extremely important in soil biology. They break down the complex organic matter into simpler substances that are taken up by the plants for various metabolic activities Read more: Saprophytes Abiotic component Non-living chemical and physical components of the environment like the soil, air, water, temperature, etc Biotic component Living organisms of the environment like plants, animals, microbes and fungi Read more: Biotic and Abiotic Trophic level It refers to the various levels in a food web as per the ow of energy. The different trophic levels are Producers (T1 Primary consumers (herbivores-T2 Secondary consumers (primary carnivores -T2 Tertiary consumers(Sec carnivores -T3 Quaternary consumers (Ter. carnivores T4 Decomposer Also see: What do you understand by trophic level? Pyramid of trophic level Is a graphical representation Can be the pyramid of numbers, the pyramid of biomass or the pyramid of energy All the pyramids start with producers a) Pyramid of numbers: gives the number of organisms present at each trophic level. It can be upright or inverted. b) Pyramid of biomass: gives the biomass of each trophic level and could be upright or inverted. c) Pyramid of energy: is always upright as it shows the ow of energy from one trophic level to the next trophic level. s ) s. s s. s ) s. ) ) ) fl fl... -  To know more about different types of Ecological Pyramid, visit here Law of conservation of energ Energy can neither be created nor destroyed; rather, it transforms from one form to another In biological systems, it gets passed from one organism to another across trophic levels To know more about the Law of conservation of energy, visit here Energy o Transfer of energy from one trophic level to another depicting its direction and amount Can be represented by the pyramid of energy In any food chain, only 10% of the energy is transferred from one trophic level to another To know more about Energy Flow in Ecosystem, visit here Food chai A series of organisms each dependent on the next as a source of food fl n w y.........  To know more about Food Chain, visit here Food we Is formed by interconnections of different food chains Is a graphical representation of ‘Who eats Whom’ in an ecosystem   b... To know more about Food Web, visit here Characteristics of ecosyste Includes the summary of trophic levels Their energy ow and pyramids Environmen Includes all living and nonliving things Unlike ecosystems, there need not be any necessary interaction between them Also see: Our Environment fl t. m....  Pollutio Pollution is the introduction of harmful materials (pollutants) into the environment. Pollution can be due to natural causes such as volcanic eruptions, forest res, etc. or due to human activities, such as carbon emission, industrial runoff, etc Know more: Types of Pollution Air pollutio Introduction of pollutants, organic molecules, or other hazardous substances into the earth’s atmosphere. Sources: a) Natural - forest re, dust storms, and volcanic activity b) Man-made - power plants, homes, industries, oil re neries, and transportatio To know more about Air Pollution, visit here Ozone layer depletio The ozone layer protects the earth from the sun's ultraviolet (UV) radiation. CFCs released into the atmosphere react chemically with ozone molecules and are depleting the layer Know more: Ozone Layer Depletion Garbage managemen Involves all the activities and actions required to manage waste from its inception to its nal disposal. n n fi n t.. fi fi. n fi  Ensures environmental best practices are followed along with proper monitoring and regulation Steps involved: 1. Segregation of waste 2. Collection 3. Transport 4. Treatment 5. Processing & Recycling 6. Disposa Read more: Solid Waste Management Biodegradable wast Waste is derived from plants or animals l e..  Decomposed into the soil by a natural agent such as weather, water, air, heat, micro-organisms, etc Biodegradatio Decomposition of garbage or waste material by living organisms or biological processes To know more about Different Types of Pollution, visit here. Frequently Asked Questions on CBSE Class 10 Science Notes Chapter 15: Our Environmen What are the different types of landforms present in our environment Mountains, hills, plateaus and plains are the four major types of landforms which are majorly present in our environment. What is 'Lithosphere' The Lithosphere is the rocky outer part of the Earth. It is made up of the brittle crust and the top part of the upper mantle Where is the 'Biosphere' present The Biosphere makes up the portion of the Earth where life exists Also Check: CBSE Class 10 Science Chapter 14 Sources of Energy Notes Real Numbers Class 10 Notes: Chapter 1 NCERT Exemplar Class 10 Science Solutions for Chapter 15 - Our Environment NCERT Solutions for Class 10 Science Chapter 15: Our Environment... n ? ?. ?. t