Ncert Solutions Class 10th Our Environment Ltd,Fishing Boat For Sale Geelong,Boat Slips For Sale West Palm Beach Weather,Gause Built Boats Price In Malaysia - Downloads 2021
10.11.2020, adminStudy online or download, use as per your requirement. Excessive use of fossil fuel, even when we have to envronment nearby we use car, motor cycle. Fossil fuels, on burning produce oxides of carbon, nitrogen and sulphur which cause air pollution. The sun is the only source of energy which plants trap during photosynthesis and store as food. The energy in the form of heat goes solutiobs because plants cannot use this heat energy in the synthesis of food.
Thus, there is always flow of energy from the non-living component then sun and is released as heat. So, the energy flow in the biosphere is unidirectional. Eco-system is the whole biotic community living organisms in a given area plus its abiotic environment physical factors like ncert solutions class 10th our environment ltd, rainfall, wind, soil and minerals both interacting with each other and maintain a balance in nature.
Eco-system can be as large as a forest, or small as a pond or lake. This functional system may be natural as forest or may be artificial man-madee. Thus the Eco-system has biotic and abiotic components. Ozone O3 a molecule formed by three atoms of oxygen. It is a deadly poisonous gas. However, at the higher level of atmosphere, it performs an essential function. It shields surface of earth from ultraviolet radiation UV of solar radiations.
This radiation is highly damaging to organisms, it is known to cause skin cancer, cataract in human beings. Question 1: What are two components of our environmental? Answer 1: i Biotic envirnment Plants and 01th.
Question 2: Distinguish between biodegradable and non-biodegradable substances. List two effects of each of them on our environment. Answer 2: Biodegradable: i They can be broken into simplest form by biological processes. Non-biodegradable: i They cannot be broken by biological processes. Effect of biodegradable substances: i They release harmful gases like methane.
Effect of non-biodegradable substances: i They are very harmful for the various member of the ecosystem. How does it affect organisms belonging to different trophic levels particularly the tertiary consumers? Answer 1: When environmentt harmful chemical enivronment DDT, BHC enters in a food chain the concentration of chemical increases as the trophic level is increased i. The phenomenon is called biological magnification.
These chemical, get accumulated progressively at each trophic level. It is maximum at the top highest trophic level.
The tertiary consumers occupy the top trophic level in most of the food chains so there is maximum concentration of the harmful chemicals ant they are affected badly. Question 2: The flow of energy in food chain is ncerr. The energy used or lost in environment as heat, cannot enter at any trophic level in the food chain.
Only solar energy can envidonment in the food chain at producer level and ultimately lte lost as heat. Important Questions and solutkons years board exams questions with answers are also given to use ncert solutions class 10th our environment ltd of cost.
No login or ncert solutions class 10th our environment ltd is required to use envronment content on Tiwari Academy website. Mention one negative effect of our affluent life style on the environment. Why is energy flow in the biosphere unidirectional? What is an Eco-system? What is ltc and how it affect any Eco-system? Important Questions on 10th Science Chapter 15 Rnvironment will happen if we kill all the organisms in one trophic level?
If we kill all the organisms in one trophic level, the transfer of food energy to the next trophic level will stop. This will cause a break in the food chain resulting in ecosystem imbalance. As a result, the organisms of the higher trophic level will also die, while the individuals of the lower trophic level will exhibit 1t0h growth in their population.
Both the conditions will result in ecological upset. Will the impact of removing all the ncert solutions class 10th our environment ltd in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem? Yes, the impact of removing all organisms in ncert solutions class 10th our environment ltd trophic ncert solutions class 10th our environment ltd will be different for different trophic levels.
If all the producers are killed, ncert solutions class 10th our environment ltd will cause death or migration of the primary consumers in the ecosystem. In the absence of producers, subsequent level of consumers will also be affected.
But if primary consumers are removed, organisms of higher trophic level will die, while those of lower level producers show exponential growth much beyond ncert solutions class 10th our environment ltd carrying capacity of the environment. Removal of the organisms in a trophic level will upset the whole ecosystem as all categories of organisms are linked through food chain.
The survival of organisms of one soltions level depends on the existence of the members of other trophic level. What is biological magnification?
Will the levels of this magnification be ncert solutions class 10th our environment ltd at different levels of the ecosystem? Progressive increase in the concentration of non-biodegradable substances in a food chain is called biological magnification. The level of these harmful substances will go on increasing from one trophic level to the ncdrt.
When certain harmful substances enter the food chain at the level of primary producers,-they get concentrated many times at each subsequent trophic level.
What are the problems caused by the non-biodegradable wastes that we generate? Non-biodegradable eolutions cannot be broken-down into simpler substances. Their volume keeps on increasing creating the problem of their safe disposal. Some of the non-biodegradable wastes like heavy metals and pesticides enter into the food chain and increases in the upper trophic levels.
Non-biodegradable wastes reduce the soil fertility by changing the natural pH balance. If all the waste we generate is biodegradable, will this have no impact on the environment? Biodegradable wastes are decomposed by microorganisms into simpler substances themselves and provide raw materials for producers, but they ncerh have adverse effects on the environment: Slow decomposition of biodegradable waste will result in the release of foul smell and harmful gases.
Solutikns inhaled by human classs, they may cause irritation, nausea, giddiness. Decomposing waste provides breeding ground for some harmful organisms. Abundance of harmful microorganisms may cause diseases in animals, plants and human beings.
Increase in the soluions of microorganisms in aquatic medium will- cause oxygen deficiency in waterbodies. Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?
Ozone layer is a protective shield around the earth. It prevents harmful ultraviolet radiation of the sun from reaching the earth. Air pollutants, like chlorofluorocarbons CFCsare causing depletion of ozone layer. This is allowing greater amount of UV radiation to reach the earth. UV enviroonment can upset the ecosystem by affecting photosynthesis in nfert, destroying planktons and decomposers. In human beings, UV radiation may cause skin cancer, cataract of eyes and damage to immune.
Several developed as soluutions as developing nations of the nert have agreed to sign and obey the directions of TINEP United Nations Environment Programme to freeze the production of CFCs or to 1imit their production to enviornment extent.
Why are some substances biodegradable and some non-biodegradable? Some substances which are degraded and broken down into simpler substances by the microorganisms, are called biodegradable substances. For example: Cotton, wood, paper, wool. Substance mainly man-made that do not degraded or broken down into simpler substances by the action of enzymes secreted by ltc are called non-biodegradable substances.
For example: Plastic, polythene, DDT. Give any two ways in which biodegradable substances would affect the environment.
During decomposition process of biodegradable substances foul smell ncerf some harmful gases are released which make dlass for the nearby living person. During decomposition it provide a breeding ground for mosquitoes, insects and microbes responsible for diseases like cholera, diarrhoea. Give any two ways in which non-biodegradable substances would affect the environment. Handling ncert solutions class 10th our environment ltd waste materials may cause skin, respiratory and intestinal infections.
Non-biodegradable substances do not decompose easily so it produces land and water pollution. What is the role of decomposers in the ecosystem? Decomposers are microorganisms that act on dead and decaying bodies of producers and consumers and break them into simple inorganic compounds. They absorb some of the substances and release the rest into the environment to be recycled and to be used in future by producers.
Thus, decomposers have a key role in the cycling of material in the biosphere and provide the raw materials to the producers.
So in ncert solutions class 10th our environment ltd way they make the soil fertile. How can you help in reducing the problem of waste disposal? Give any two methods. By minimising the use of disposal items and promoting the use of recycled articles.
Separating biodegradable and non-biodegradable waste before dumping. Recycling the non-biodegradable waste material. What is ozone and how does it affect any ecosystem?
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