Our Environment (Full Chapter) || for Class 10 in Hindi

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Жыл бұрын

In this Physics video for Class 10 in Hindi we discussed on our environment and we explained what ecosystem, food chain and food web are. This is a topic of Chapter 15 - 'Our Environment' from NCERT for Class 10.
The surroundings or conditions in which a person, animal, or plant lives or operates is called its environment. The surroundings can be biotic or abiotic.
A biological community of interacting organisms and their physical environment is called an ecosystem.
An ecosystem consists of producers, consumers and decomposers.
Plants and photosynthetic bacteria are the producers, which traps the energy from sunlight and produces food.
Organisms which feed on those plants or other organisms are called consumers. They are herbivores, carnivores, omnivores and parasites.
Decomposers decompose the dead bodies. e.g., some bacteria, fungi, worms etc.
Food chain is a series of organisms each dependent on the previous as a source of food.
Each step or level of the food chain forms a trophic level.
Producers are autotrophs or are at the first trophic level. Primary consumers are at the second trophic level. And so on....
Food we eat acts as a fuel to provide us energy to do work. Energy in form of food moves from lower trophic level to higher trophic level.
The green plants in a terrestrial ecosystem capture about 1% of the energy of sunlight that falls on their leaves and convert it into food energy.
When green plants are eaten by primary consumers, a great deal of energy is lost as heat to the environment, some amount goes into digestion and in doing work and the rest goes towards growth and reproduction. An average of 10% of the food eaten is turned into its own body and made available for the next level of consumers.
Very little amount of energy is available for the next level of consumers, food chains generally consist of only three or four steps.
The loss of energy at each step is so great that very little usable energy remains after four trophic levels.
There are generally a greater number of individuals at the lower trophic levels of an ecosystem, the greatest number is of the producers.
The length and complexity of food chains vary greatly. Each organism is generally eaten by two or more other kinds of organisms which in turn are eaten by several other organisms. So instead of a straight line food chain, the relationship can be shown as a series of branching lines called a food web.
Flow of energy is unidirectional. The energy that is captured by the autotrophs does not revert back to the solar input and the energy which passes to the herbivores does not come back to autotrophs. As it moves progressively through the various trophic levels it is no longer available to the previous level.
The energy available at each trophic level gets diminished progressively due to loss of energy at each level.
Harmful chemicals enter our bodies through the food chain. For example, when water gets polluted due to the use of several pesticides and other chemicals to protect our crops from diseases and pests. These chemicals are either washed down into the soil or into the water bodies.
From the soil, these are absorbed by the plants along with water and minerals, and from the water bodies these are taken up by aquatic plants and animals. This is one of the ways in which they enter the food chain.
As these chemicals are not degradable, these get accumulated progressively at each trophic level. As human beings occupy the top level in any food chain, the maximum concentration of these chemicals
get accumulated in our bodies. This phenomenon is known as biological magnification.
The amount of ozone in the atmosphere began to drop sharply in the 1980s. This decrease has been linked to chemicals like chlorofluorocarbons (CFCs) which are used as refrigerants and in fire extinguishers.
In 1987, the United Nations Environment Programme (UNEP) succeeded in forging an agreement to freeze CFC production at 1986 levels. It is now mandatory for all the manufacturing companies to make CFC-free refrigerators throughout the world.
Many human-made materials like plastics are not broken down by the action of bacteria or other saprophytes. These materials are known as non-biodegradable materials.
Under the ambient conditions found in our environment, these materials persist for a long time and harm the various members of the eco-system.

Пікірлер: 62

@sonalipukale2970 Жыл бұрын

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@Rahul-es9ng Жыл бұрын

I m too because of u 😂

@rishita.Rathore.501 Жыл бұрын

But still you don't know how to spell words

@rishita.Rathore.501 Жыл бұрын

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@rishita.Rathore.501 Жыл бұрын

@Ayyoob Malik sonali

@rishita.Rathore.501 Жыл бұрын

@Ayyoob Malik sonali pukale to whom I replied

@adeelahmed6252 Жыл бұрын

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@sameersaheb113 Жыл бұрын

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@sameersaheb113 Жыл бұрын

Yes

@kajalsharma2252 Жыл бұрын

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@rohitkumarmalik1126 8 ай бұрын

The most underrated teacher ❤❤❤

@Zulkarnain862 Жыл бұрын

Sir, in class 9th science NCERT there is one chapter named drug abuse and sexually transmitted diseases. This is too difficult for us. Because we haven't any source from which we can learn this due to the fact that we are from an backward are of J and K. There is too bad weather conditions that we can also move. Please make a vedio on it sir. I shall be very thankful for your esteemedselfness.

@amairakhan5758 Жыл бұрын

I was eagerly waiting for this topic vedio.. thank you so much sir 🙏

@Talha_since_2006 Жыл бұрын

Thank you sir😊

@naila1414jabeen Жыл бұрын

Sir cant we make ozone molecules in lab and rebuilt ozone layer?

@shubhamkumartiwari4267 Жыл бұрын

Sir pls make vid on diversity, improvement in food resource and natural resources . Class 9

@anantgupta1188 Жыл бұрын

Hello Sir Sir please upload a video series on the chapter "Diversity" of class 9 :)

@Amitgupta-xr5xi Жыл бұрын

Thank you sir 🙏

@Madan_1M9770 Жыл бұрын

Mere fevaret teacher hai aap ❤

@adeelahmed6252 Жыл бұрын

Sir please make playlist on our environment 🙏 full chapter

@Snehakumari9044 Жыл бұрын

Sir ball ko upar feke tb aur jab vo niche aayega tb dono case me velocity same rahega ya different?? Sir ye dushre chapter se related problem h but clear kr dijiye na bht confusion hai

@seemashukla8737 Жыл бұрын

Excellent explaination

@abhishekmathsguru7459 Жыл бұрын

👍👍

@sushilsoren7147 Жыл бұрын

Sir... Aap jis tarah samjhate hai... Batate hai, (deep learning study ) karte hai, chapter se leker topic gahrai take jaker (deepest point /topic) ko jis tarah batate hai ,samjhate hai.. Avi tak hm apne life m, aise teacher ko nahi paya hai..

@njart007 Жыл бұрын

Thank you so much ❤️❤️❤️❤️❤️❤️❤️❤️❤️

@analysischannel2322 Жыл бұрын

Love you sir

@abhaykumarjha8856 Жыл бұрын

Great sir

@raavanagaming Жыл бұрын

1st pin please

@anshgupta6087 Жыл бұрын

Welcome back on edupoint 9th 10th chañnel after 1 month ///

@Akcricketchampion Жыл бұрын

Sir, please give me reply 🙏 "why every action force have reaction force" What is cause of Newton's third law of motion. Please sir🙏🙏🙏

@happybbbbbb Жыл бұрын

Sir ab acha sa samja ta ha air vidio upload karo sir

@user-xs6ot6rl2j Жыл бұрын

Sir our class10th CBSE board exam is completed sir please teach us in class 11th also 🙏 your class help me a lot in class 10th so sir please teach us in class 11th

@a.dashish2844 Жыл бұрын

sir I am your old student and mera ye question hai ki , plane mirror ka focal length infinite kyu hota hai (class 10)

@System69536 11 ай бұрын

Because uska perture bhi infinite hota Hain

@analysischannel2322 Жыл бұрын

Sir ek baar aap se milna Hain 🙏🙏🙏🙏🙏

@pkgoal2932 Жыл бұрын

Sir , sources of energy ki video laiye

@Vaidehi7837 Жыл бұрын

Biology kai chapter bhi sir

@AryanKumar-tp2qx 18 күн бұрын

Sir a doubt please make a video on it Electricity we know that V=W/q and q=i×t So V=W/i×t V is inversely proportional to i but ohm's law says V is directly proportional to I What is truth Sir please explain

@aryandubey1281 Жыл бұрын

Sir make video of class 9 biology about ribosomes

@JaswantKumar-dh9hk Жыл бұрын

Sir 9 k 2chpters pr videos bna do plzzz Food resources and natural resources pr plzz sir

@umeshsaroj7622 Жыл бұрын

Sir please make videos on class 11 chemistry physics

@Toxic00051 Жыл бұрын

Sir please 9th class Diversity in Living Organism per video Dal Liye

@lakshya__gupta Жыл бұрын

Sir in your first video of magnetic effect of electric current for a few seconds at some last time lapse ,,, you have discussed that why all metals are not magnetic,,, this depends on its electronic structure ,,, some becomes paramagnetic / diamagnetic/ ferromagnetic and this all depends on the electronic structure of element,,, & steel is magnetised by Electromagnet then it remains magnetized becomes permanent and does not lose its magnetism and many more BUT WHYYYYYY??? AND you have also said that you will discuss it in another separate video as it is a long story so Plzzzzzzzzzzzzzzzz have a long video as much as long video you can record on this topic please record and upload a video. .