Renewable and non renewable resources for class 10 {PHYSICS}


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Renewable and non renewable resources for class 10 {PHYSICS}

  3. 3. WHAT ARE RESOURCES??? Resources: The total means available for economic and political development, such as mineral wealth, labor force, and armaments. Resources: The total means available to a company for increasing production or profit, including plant, labor, and raw material; assets.
  4. 4. WHAT ARE RENEWABLE RESOURCES??? Renewable resources are natural resources that can be replenished in a short period of time. Types of renewable resources are – ● Solar ● Wind ● Water ● Geothermal ● Biomass
  5. 5. SOLAR ENERGY • Solar energy is energy that comes directly from the sun. The sun is a constant natural source of heat and light, and its radiation can be converted to electricity. Solar technologies :•Solar electric •Solar water heating •Solar space heating
  6. 6. ELECTRIAL SOLAR ENERGY Energy from the sun can be directly converted to electricity using solar cells, also known as photovoltaic's or PVs. Advantage- pollution free 20-25 year warranty used to offset utility power stand-alone power for remote applications Disadvantage - Costs 3-5 times more than utility power
  7. 7. WIND ENERGY Natural conditions of climate and geography produce the winds that blow across the landscape. Historically, windmills were used to supply mechanical energy, for example to pump water or grind grain. Modern day wind turbines produce electricity.
  8. 8. WIND ENERGY ADVANTAGES: Wind energy is friendly to the surrounding environment, as no fossil fuels are burnt to generate electricity from wind energy. Wind turbines take up less space than the average power station. Windmills only have to occupy a few square meters for the base,
  9. 9. WIND ENERGY this allows the land around the turbine to be used for many purposes, for example agriculture. Newer technologies are making the extraction of wind energy much more efficient. The wind is free, and we are able to cash in on this free source of energy.
  10. 10. WIND ENERGY DISADVANTAGES : The main disadvantage regarding wind power is down to the winds unreliability factor. In many areas, the winds strength is too low to support a wind turbine or wind farm. Wind turbines generally produce allot less electricity than the average fossil fuelled power station, requiring multiple wind turbines to be built in order to make an impact.
  11. 11. Wind turbine construction can be very expensive and costly to surrounding wildlife during the build process. Protests and/or petitions usually confront any proposed wind farm development. People feel the countryside should be left in tact for everyone to enjoy it's beauty.
  12. 12. WATER ENERGY Snowmelt and runoff from precipitation at higher elevations flow toward sea level in streams and rivers. In an earlier era, water wheels used the power of flowing water to turn grinding stones and to run mechanical equipment. Modern hydro-turbines use water power to generate hydroelectricity.
  13. 13. WATER ENERGY ADVANTAGES: Hydroelectricity is a renewable energy source that does not produce greenhouse gases. When a hydroelectricity water storage dam is built, the water in the dam can be used as a source of drinking water and for recreational purposes such as boating and fishing.
  14. 14. WATER ENERGY Operation and maintenance costs for hydroelectricity plants are much lower than for thermal electricity power plants. Breakdowns are few because their mechanical design is relatively simple, and no excess heat is generated during operations. Hydroelectricity generating plants have a long life.
  15. 15. WATER ENERGY DISADVANTAGES Usually a large area of land has to be flooded to ensure a continuous flow of water to the turbine. In some cases when a dam is built, large populations have to be relocated. In China, the Three Gorges Dam Project on the Yangtze River will displace more than 1 million people.
  16. 16. WATER ENERGY DISADVANTAGES Usually a large area of land has to be flooded to ensure a continuous flow of water to the turbine. In some cases when a dam is built, large populations have to be relocated. In China, the Three Gorges Dam Project on the Yangtze River will displace more than 1 million people.
  17. 17. WATER ENERGY Dams affect river ecosystems. Rivers usually experience seasonal flooding that flush out river backwaters and deposit silt on riverbanks. Dams prevent those seasonal floods and allow silt and vegetation to clog up river backwaters. This causes changes to the environments, which may impact plant and animal habitats. Hydroelectricity dams are costly to build.
  18. 18. WATER ENERGY DISADVANTAGES Usually a large area of land has to be flooded to ensure a continuous flow of water to the turbine. In some cases when a dam is built, large populations have to be relocated. In China, the Three Gorges Dam Project on the Yangtze River will displace more than 1 million people.
  19. 19. GEOTHERMAL ENERGY Heat from deep within the earth is called "geothermal energy." Three types of power plants are used to generate power from geothermal energy: dry steam, flash, and binary.
  20. 20. GEOTHERMAL ENERGY ADVANTAGES: The production of electricity from geothermal energy sources can be a highly efficient means of delivering clean and renewable electricity to many people. Location is of key importance for the development of an efficient geothermal power station and therefore, economically viable levels of electricity can only be generated in certain areas of the world.
  21. 21. GEOTHERMAL ENERGY There are only a handful of locations across the world that are capable of producing viable and efficient levels of electricity from geothermal energy sources and as a result of this, in 2007, less than 1% of the world's electricity supply was produced from geothermal sources.
  22. 22. GEOTHERMAL ENERGY DISADVANTAGES : Although geothermal energy can be a useful and economically viable renewable energy source, there are several disadvantages of using the power of geothermal energy to provide hot water for your home.
  23. 23. GEOTHERMAL ENERGY The initial cost of design and installation can be costly yet this investment would be likely to pay off over the years of operation. The area needed to lay the piping system can be quite large and this may not be suitable for small developments.
  24. 24. BIOMASS ENERGY Biomass is a renewable source of energy because the natural process of photosynthesis constantly produces new organic matter in the growth of trees and plants. Photosynthesis stores the sun´s energy in organic matter. Biomass is used to make heat, electricity and liquid fuels.
  25. 25. WHAT ARE NON RENEWABLE RESOURCES?? Non-renewable energy resource: an energy resource that is not replaced or is replaced only very slowly by natural processes. Primary examples of non-renewable energy resources are the fossil fuels-oil, natural gas, and coal.
  26. 26. WHAT ARE NON RENEWABLE RESOURCES?? Fossil fuels are continually produced by the decay of plant and animal matter, but the rate of their production is extremely slow, very much slower than the rate at which we use them
  27. 27. WHAT ARE NON RENEWABLE RESOURCES?? Any non-renewable energy resources that we use are not replaced in a reasonable amount of time (our lifetime, our children's lifetime,...) and are thus considered "used up", not available to us again.
  28. 28. TYPES OF NON RENEWABLE RESOURCES?? •Petroleum •Coal •Natural Gas •Nuclear Power
  29. 29. Petroleum Petroleum is extracted and turned into a variety of fuel sources including petrol or gasoline, diesel, propane, jet fuel, heating oil and paraffin wax. Also known as crude oil, this fuel source is nonrenewable.
  30. 30. COAL Coal is also composed of organic matter --- matter that decomposed in peat bogs, which then formed into carbon rock under immense pressure. Coal is generally highly combustible and the world's most-used resource for electrical generation. Burning coal releases massive amounts of carbon dioxide into the atmosphere. In addition to being greenhouse gas source, coal cannot be reproduced.
  31. 31. NATURAL GAS Also a byproduct of decomposition, natural gas is mostly methane created as organic matter decays. Once extracted, natural gas is processed to remove everything but the methane. This produces a variety of other natural gases, such as ethane, propane and butane, which are also used as fuels. While it is a fairly clean-burning fossil fuel, it is a nonrenewable energy source because it is a byproduct of thousands of years of decomposition within the earth's crust.
  32. 32. NUCLEAR POWER Nuclear energy may get mentioned in the same breath with renewable power sources like wind and solar because it is clean-burning and therefore more environmentally sound than oil or coal. But nuclear energy is, in fact, a nonrenewable resource. The problem lies in the element that enables nuclear power: uranium. The element uranium is abundant, but only a certain type of uranium, U-235, is used to fuel nuclear power. We have a limited natural supply.