Science ppt by ankit
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This document discusses food chains, food webs, trophic levels, and how energy flows through ecosystems. It also addresses how human activities can negatively impact the environment. Specifically, it notes that: 1) A food chain represents a single path of energy transfer between organisms, starting with producers and ending with carnivores. A food web incorporates multiple interconnected food chains as organisms receive energy from different sources. 2) Trophic levels refer to the steps in a food chain, with producers at the first level and higher-order consumers at subsequent levels. Only about 10% of energy is transferred between trophic levels, limiting the length of food chains. 3) Pollutants can biomagnify and increase
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Our environment.ppt
This document provides information about ecosystems and the environment. It discusses how human activities produce waste that pollutes the air, water and soil. It describes biodegradable and non-biodegradable waste. It also explains the components of an ecosystem like producers, consumers and decomposers. Additionally, it covers topics like food chains, food webs, trophic levels, energy flow between trophic levels, and biological magnification. Finally, it discusses how human activities like the use of CFCs damage the ozone layer and the importance of proper garbage disposal.
OUR ENVIRONMENT.ppt.pptx
This document provides information about ecosystems and the environment. It discusses how human activities produce waste that pollutes the air, water and soil. It describes biodegradable and non-biodegradable waste. It also explains the components of an ecosystem like producers, consumers and decomposers. Additionally, it covers topics like food chains, food webs, trophic levels, energy flow between trophic levels, and biological magnification. Finally, it discusses how human activities like the use of CFCs damage the ozone layer and the importance of proper garbage disposal.
OUR ENVIRONMENT.ppt.pdf
This document provides information about ecosystems and the environment. It discusses how human activities produce waste that pollutes the air, water and soil. It describes biodegradable and non-biodegradable waste. It also explains the components of an ecosystem like producers, consumers and decomposers. Additionally, it covers topics like food chains, food webs, trophic levels, energy flow between trophic levels, and biological magnification. Finally, it discusses how human activities like the use of CFCs damage the ozone layer and the importance of proper garbage disposal.
OUR ENVIRONMENT AND ITS FUNDAMENTALS IN THE SOCIETY
This document provides information about ecosystems and the environment. It discusses how human activities produce waste that pollutes the air, water and soil. It describes the components of an ecosystem, including biotic factors like producers, consumers, decomposers and abiotic factors like air, water and soil. Food chains and food webs are explained as the transfer of energy from plants to primary, secondary and tertiary consumers. Trophic levels and the 10% law of energy transfer between levels are also outlined. The document discusses how pollution becomes biologically magnified up the food chain and ends by explaining how human activities like CFC emissions damage the ozone layer and ways to properly dispose of household garbage.
OUR ENVIRONMENT.ppt.pptx
This document provides information about ecosystems and the environment. It discusses how human activities produce waste that pollutes the air, water and soil. It describes biodegradable and non-biodegradable waste. It also explains the components of an ecosystem like producers, consumers and decomposers. Additionally, it covers topics like food chains, food webs, trophic levels, energy flow between trophic levels, and biological magnification. Finally, it discusses how human activities like the use of CFCs damage the ozone layer and the importance of proper garbage disposal.
BIO PPT.pptx
Human activities produce waste that pollutes the environment. Waste is either biodegradable like food scraps, or non-biodegradable like plastics. An ecosystem consists of living and non-living components that interact, like producers, consumers, and decomposers in natural or artificial settings. Food chains show how energy passes between organisms, while food webs show multiple connections between different chains. Harmful chemicals can accumulate up food chains through biological magnification. Human activities like CFC use damage the ozone layer and improper garbage disposal causes pollution, so waste must be disposed of properly through methods like composting, recycling, and sewage treatment.
Our environment class 10
Naman Sharma's report discusses key components of the environment including ecosystems, food chains, and the ozone layer. An ecosystem consists of biotic and abiotic factors. Organisms can be grouped as producers, consumers, or decomposers. Food chains show the transfer of energy between trophic levels. A food web illustrates the complex relationships between different organisms in an ecosystem. The ozone layer protects the Earth from UV radiation but is being depleted by chemicals like CFCs. Proper waste management is needed to reduce pollution and use of non-biodegradable materials.
Class 10 Ch 12 Our environment Notes Ex.pdf
The document discusses ecosystems and environmental problems caused by human activities. It defines an ecosystem as all interacting organisms in an area together with non-living components, forming either natural or artificial systems. Food chains show the transfer of energy between trophic levels of producers, consumers, and decomposers. However, only 10% of energy is transferred between levels, limiting food chain length. Human activities like CFC emissions depleted the ozone layer, while increased waste production requires disposal methods like biogas plants, recycling, and landfills to process biodegradable and non-biodegradable garbage.
Chapter 15 our environment
The document discusses ecosystems and how human activities impact the environment. It describes the components of an ecosystem like producers, consumers, decomposers and abiotic factors. There is a 10% loss of energy at each trophic level, limiting the number that can exist in a food chain. Human waste and chemicals like CFCs threaten ecosystems by polluting the air, water and soil. Improper waste disposal and ozone layer depletion are significant environmental issues addressed in the text.
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The document discusses ecosystems and how human activities impact the environment. It describes the components of an ecosystem like producers, consumers, decomposers and abiotic factors. There is a 10% loss of energy at each trophic level, limiting the number that can exist in a food chain. Human waste and chemicals like CFCs threaten ecosystems by polluting the air, water and soil. Improper waste disposal and ozone layer depletion are significant environmental issues addressed in the text.
CH. 15 X OUR ENVIRONMENT.ppt.pdf
This document provides information about ecosystems and the environment in 3 chapters. It discusses how human waste can pollute the air, water and soil if not disposed of properly. It also explains food chains and trophic levels, and how energy is transferred between each level. Finally, it discusses how human activities like the use of CFCs can damage the ozone layer and discusses methods for proper garbage disposal like landfills, recycling, and composting.
Ourenvironment ppt
The document discusses the effects of human waste on the environment, describing biodegradable and non-biodegradable waste. It then explains key components of ecosystems like producers, consumers, decomposers and trophic levels. Food chains and webs are described along with how energy decreases at each trophic level. The document also discusses how harmful chemicals can biomagnify up food chains. Finally, it covers several human impacts like ozone layer depletion and different methods for managing garbage.
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OUR ENVIRONMENT AND ITS FUNDAMENTALS IN THE SOCIETY
OUR ENVIRONMENT AND ITS FUNDAMENTALS IN THE SOCIETY
cr7 our environment 123456789hgfegyufghftfuhjvh fgeufghjgv
cr7 our environment 123456789hgfegyufghftfuhjvh fgeufghjgv
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Science ppt by ankit
- 2. a) Foodchain:- A foodchainis the flowof foodenergyfromone organismto the next and to the next and so on. Theyusuallystartwith a producer(plants) and end with a carnivore.In a foodchainan organismgetsfoodfromone groupof organisms. eatenby eatenby Eg:- Grass Deer Lion (producer) (primaryconsumer) (secondaryconsumer) eatenby eatenby eatenby Grass Insects Frog Snake (producer) (primaryconsumer) (secondaryconsumer) (tertiaryconsumer) eatenby eatenby eatenby eatenby Grass Moth Frog Snake Hawk (producer) (primaryconsumer) (secondaryconsumer) (tertiaryconsumer) (quarternaryconsumer)
- 3. Food Chain
- 4. b) Food web :- Foodwebisa groupof severalinterconnectedfoodchains.In a foodwebanorganismgetsfoodfrommorethan onegroupof organisms.
- 5. 4) Trophic levels :- Eachstepin a foodchain wheretransfer of foodenergytakesplaceis calledtrophiclevel. The firsttrophiclevelconsistsof producers. The secondtrophiclevelconsistsof primaryconsumers. The thirdtrophiclevelconsistsof secondaryconsumers. The fourthtrophiclevelconsistsof tertiaryconsumers. Since thetransfer of foodenergydecreasesat everytrophiclevel,the numberof trophiclevelsare limitedand do not exceed fouror five.
- 6. Energy flow in trophic levels :- Green plants (producers) absorb about 1% of solar energy falling on the leaves and stores it as food energy during photosynthesis. During the transfer of food energy from one trophic level to the next, 90% of the energy is lost to the environment and only 10% is transferred to the next trophic level. So there is a decrease in the amount of food energy transferred at every trophic level by 10%. This is known as the 10% law.
- 7. Biological magnification (Biomagnification) :- Harmful chemicals like insecticides and pesticides which are used to protect crops from insects and pests are absorbed by plants and enter the food chain. Since these chemicals are non biodegradable, they get accumulated at every trophic level and their concentration increases. Since human beings occupy the highest trophic level, the concentration of these harmful chemicals is maximum in our bodies. The increase in concentration of harmful chemicals in the bodies of organisms at higher trophic levels is called biological magnification.
- 8. Human activities affect the environment :- a) Depletion of ozone layer in the atmosphere :- Ozone molecule contains three oxygen atoms (O3). At higher levels in the atmosphere the UV radiation splits some oxygen molecules (O2) into free oxygen atoms which combines with oxygen molecules (O2) to form ozone. It is highly poisonous. UV radiation O2 O + O O2 + O O3 The ozone layer present in the higher layer of the atmosphere protects the earth from the harmful UV radiation from the sun. UV radiation causes skin cancer in humans. The ozone layer is being damaged by the use of chemicals like chloro fluoro carbons (CFCs) used in refrigerators and fire extinguishers. So the use of CFCs is now being reduced to protect the ozone layer.
- 10. b) Managing the garbage we produce The household waste is called garbage. Some of the garbage is biodegradable and some are non biodegradable. Garbage causes pollution of air, water and soil. So it should be disposed properly. Some of the methods of garbage disposal are :- i) Land fills ii) Recycling iii) Production of biogas and manure iv) Preparation of compost v) Incineration vi) Sewage treatment
- 11. Land fills Recycling Production of biogas and manure Preparation of compost
- 12. Incinerator
- 13. Sewage treatment
- 14. Made By Ankit Of Class : X AThank You For Watching It Hope You Liked It