Class 10th Ncert Our Environment Instance
08.03.2021
Class 10 Our Environment NCERT Notes - Leverage Edu
Aug 29, �� Class 10 Our Environment also covers the concepts of food chains and food webs which are integral to the smooth functioning of any ecosystem. Organisms Class 10th Ncert Our Environment Instance Class 10th Ncert Our Environment Instance feed on one another for fulfilling their nourishment needs in the environment. These organisms constitute the . SOLUTION: Ans.: (d) Class 10th Ncert Our Environment Instance 10th Our Ncert Class Environment Instance All of the above Q 4. What will happen if we kill all the organisms in one trophic level? SOLUTION: Class 10th Ncert Our Environment Instance Ans.: It will disturb the food chains and food web which in turn, will decrease the chances of food availability to the succeeding trophic levels and finally result in instability of . The NCERT Solutions for Class 10 Class 10th Ncert Our Environment Instance Science Chapter 15 Our Environment are in alignment with the latest CBSE Class 10 syllabus and answer format. So, Class 10th Ncert Our Environment Instance you can download and refer to these NCERT Solutions for your exam preparation. These NCERT Solutions will guide Class 10th Ncert Our Environment Instance Class 10th Ncert Our Environment Instance you to write precise answers for all types of questions commonly asked in the examination.
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These include the physical environment. Climatic factors: These are Class 10th Ncert Our Environment Instance sunlight temperature, pressure humidity, moisture, rainfall, etc. Food chain, Food web, Trophic levels. Flow of energy ten percent law, Class 10th Ncert Our Environment Instance Depletion of the ozone layer, Biological magnification. Mode of waste disposal. Food Chain: The sequence of living organisms in a community in which one organism consumes another organism to transfer food energy, is called a food chain.Class 10th Ncert Our Environment Instance Class 10th Ncert Our Environment Instance
A food chain is unidirection where transfer of energy takes place in only one direction. OR Food chain refers to an arrangement of different biotic groups in a sequence of energy transfer.
These biotic groups are producer herbivores, Class 10th Ncert Our Environment Instance carnivores. Grass synthesize their own food by the process of photosynthesis. Grass is eaten up by deer, which represents Class 10th Ncert Instance Environment Our the herbivores or the primary consumers. Deer in turn is consumed by lion, the carnivores or the secondary consumers. Food Web: The inter-connected food chains operating in an ecosystem which establish a network of relationship between various species, are called a food web. In a food web, one organism may occupy a position in more than one Our Instance 10th Environment Class Ncert food chain.
An organism can obtain its food from different sources and in turn, may be eaten up Class 10th Ncert Our Environment Instance by different types of organisms. Trophic Levels: The various steps in the food chain at which the transfer of Class 10th Ncert Our Environment Instance Class 10th Ncert Our Environment Instance food or energy takes place is called trophic levels. There is a gradual decrease in the amount of energy transfer from one trophic level to the next trophic level in a food chain.
The various trophic levels are Class 10th Ncert Our Environment Instance given below :. Flow Open Energy Energy is used and conveyed from one trophic level to another in a food chain. This is called flow of energy. A part of this trapped energy is used by plants in performing their metabolic activities and some energy is released as heat into the atmosphere. When plants are eaten up by herbivores, the chemical energy stored in the plants is transferred to these animals. The process of energy transferred Class 10th Ncert Our Environment Instance Class 10th Ncert Our Environment Instance is similarly repeated with carnivores and so on.
Ten percent law: Ten percent law states that only 10 percent Class 10th Ncert Our Environment Instance of the energy entering a particular trophic level of organisms is available for transfer to the next higher trophic level. So, plants utilizes only 10 J of energy. Thus, carnivore animals have only 0. Environmental Problems: Changes in the environment affect us and our activities change the environment around us.
This led to the slow degradation of the environment that arose many environmental problems. For Example; depletion of the Ozone Layer and waste disposal. Depletion of Class 10th Ncert Our Environment Instance Instance 10th Our Class Environment Ncert Ozone Layer: Ozone O3 layer is largely found in the stratosphere which is a part of our atmosphere from 12 km km above sea level.
This region is called ozonosphere. Ozone is deadly poisonous at the ground level. Ozone is formed as a result of the following photochemical reaction. Ozone layer is a protective blanket around Class 10th Ncert Our Environment Instance earth which absorbs most of the harmful U. Ultraviolet radiation of the Sun, thus, protecting the living beings of the Earth from health hazards like skin cancer, cataract in eyes, weaken immune system, destruction of plants etc.
For example; Freon which are used as refrigerants and also in fire extinguishers caused Ozone depletion in the upper atmosphere. A single chlorine atom can destroys 1,00, Ozone molecules.
Biological Magnification: The increase in concentration of harmful chemical Class 10th Ncert Our Environment Instance substances like pesticides in the body of living organisms at each trophic level of a food chain is called Class 10th Ncert Our Environment Instance biological magnification.
Example: Maximum concentration of such chemicals gets accumulated in human bodies. The disposal of waste should be done in a scientific way. There are different methods of waste disposal. The method to be used depends on Class 10th Ncert Our Environment Instance the nature of the waste.
Some of the important modes of waste disposal are :. Environment: The combination of Class 10th Ncert Our Environment Instance Environment Class Our 10th Instance Ncert Class 10th Ncert Our Environment Instance all the physical and biological conditions affecting the responses of living organisms is called environment. Non-biodegradable wastes: The wastes Class 10th Ncert Our Environment Instance which cannot be broken down by the enzymes produced by microorganisms into simpler and harmless products in nature are called non- biodegradable wastes. Incineration: Destruction of waste materials by burning at high temperature is called incineration.
Biotic Community: Class 10th Ncert Our Environment Instance A group of various populations of organisms living in a region is called the biotic community. Ecosystems: The self-contained and distinct functional unit capable of independent existence made by the interaction of living and non-living components is called an ecosystem. Autotrophs: Those organisms which can produce their own food are called autotrophs or producers. All green plants are producers.
Consumers: Those organisms which are unable to synthesise their food themselves and consume the food produced Class 10th Ncert Our Environment Instance by producers or eat other organisms as food, are known as consumers. Decomposers: Bacteria and fungi which break down Class 10th Ncert Our Environment Instance the complex organic compounds present in the dead plants and animals and their products into simpler substances are known Class 10th Ncert Our Environment Instance as decomposers.
Food Chain: A series of organisms in a community in which one organism consumes another organism to Class 10th Ncert Our Environment Instance transfer food energy is called a food chain. Trophic levels: Each step of the food chain is known as a trophic level. Food Web: The web formed by the interconnection of food-chains of the various trophic levels is Class 10th Ncert Our Environment Instance called a food web. Biomagnification: The increase in the concentration of the harmful chemicals in the body of an Class 10th Ncert Our Environment Instance organism per unit its mass at each successive trophic level in a food chain is known as biomagnification.
Ozone-depleting substances: Chlorofluorocarbons CFCs , oxides of nitrogen, methane, carbon tetrachloride and chlorine are the ozone-depleting substances. It includes air, Class 10th Ncert Our Environment Instance light, soil, temperature, water and the presence or absence of other organisms, i. The environment has three main components, viz :. Physical environment: It is also called a abiotic or non-living environment. It includes :. Other important constituents of the biotic environment includes Kites and vultures as they feed on dead organisms and act as scavengers cleansing agents of Class 10th Ncert Our Environment Instance the environment.
Ecosystem: A community of organisms, interacting with each other, plus the environment in which they live and with which they also interact.
The examples of the ecosystem are a pond; a desert; a forest; a lake; Class 10th Ncert Our Environment Instance a river; a mountain; the sea. All the above ecosystems are made up of two main components. Autotrophs Producers Class 10th Ncert Our Environment Instance Class 10th Ncert Our Environment Instance and Heterotrophs consumers :. Food Ncert Solutions Class 10th Our Environment Test chain: The sequence of living organisms in a.
Ozone layer : Ozone O 3 is a molecule formed by three atoms of oxygen unlike oxygen which is required for respiration by aerobic forms, ozone Class 10th Ncert Our Environment Instance Instance 10th Environment Class Ncert Our is a deadly poison. However, at the higher levels of the atmosphere,. It shields the surface of the earth Class 10th Ncert Our Environment Instance Environment Our Ncert Class Instance 10th from ultraviolet UV radiation from the Sun.
The impact of removing all the organisms in a trophic level will Class 10th Ncert Our Environment Instance be different for different trophic levels, e. Removal of all the organisms of any trophic level will always adversely Class 10th Ncert Our Environment Instance affect the ecosystem, e. What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem? Due to this, the vital elements trapped in them are not released back to environment in Class 10th Ncert Our Environment Instance the natural way.
Polythene, plastics etc. These wastes do not burn completely in presence of oxygen and release toxic gases which causes air pollution. Autotrophs or the producers capture the energy of the sunlight to produce food. This energy flows from autotrophs to heterotrophs and decomposers in a food chain, making a flow of energy. However, during the transmission, the energy gets converted into other forms, and some energy gets lost in the transmission that Class 10th Ncert Our Environment Instance cannot be used again.
A flow of energy moves progressively throughout the trophic level and will always be unidirectional. It means that autotrophs cannot give back the energy to the sun, and the same applies to heterotrophs and decomposers. Moving further to the summary of the next sub-unit in Class 10 Our Environment notes, the topic of the Ozone Layer is an imperative one to understand. Ozone is a molecule that contains three atoms of oxygen.
While it is a deadly poison at the ground level, it plays a significant role at the higher levels of the atmosphere in protecting the earth. It absorbs the UV radiation of the sun and protects the organisms from different types of severe health problems like skin cancer. The increased use of CFCs chlorofluorocarbons in appliances like refrigerators and fire extinguishers affects the ozone layer. It is one of the reasons that are responsible for Our Environment 10th Ncert Instance Class the depletion of the ozone layer. Thus, many modern-day appliances are CFC-free, which helps in sustaining the level of the ozone layer in the atmosphere.
Careless waste disposal creates different environmental problems. Categorized as biodegradable or non-biodegradable, waste Class 10th Ncert Our Environment Instance causes a hazardous impact on the surrounding when left undisposed. The difference between the two types of waste is that when a substance is easily broken down by biological processes and decomposed completely, it is said to be Instance 10th Our Ncert Environment Class biodegradable but when a substance is not broken by the biological processes or decomposed it is said to be Class 10th Ncert Our Environment Instance Class 10th Ncert Our Environment Instance non-biodegradable.
With the increase in garbage and waste materials, it is important to manage waste disposal by various Class 10th Ncert Our Environment Instance means. The best ways to facilitate garbage management is through methods like biogas plants, sewage treatment plants, land fillings, Class 10th Ncert Our Environment Instance recycling, etc.
Now that you have gone through the Class 10 Our Environment notes, here are some important exam questions you must practice:. Thus, we hope that our detailed Class 10 Our Environment notes help you understand the Class 10th Ncert Our Environment Instance Class 10th Ncert Our Environment Instance essentials of this chapter. Planning Class 10th Ncert Our Environment Mac to opt for Science after 10th? Reach out to our Leverage Edu experts and Class 10th Ncert Our Environment Instance we will guide you in making an informed decision regarding the selection of the right stream after 10th!
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