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    Suchergebnis für 'Energy'



  • Siemens Stiftung
    Energy conversion chains
    Matching exercise:Images illustrate energy conversion processes in everyday life, and the involved energy forms can be matched to them. Our everyday lives consist of energy conversion processes. An energy conversion chain can be seen in nearly everything that happens. Are we aware of them? The examples make the individual chains clear. For example, nuclear energy in the sun is converted to thermal energy and radiant energy. An apple tree uses the radiant energy for photosynthesis; radiant energy is converted to chemical energy.Information and ideas:The students can continue the energy conversion chains. For instance, what happens when the apple from the tree is eaten?The symbol icons and the energy forms they represent: plug for electrical energy, conical flash for chemical energy, atom for nuclear energy, gears for mechanical energy, sun for radiant energy, and teakettle for thermal energy.

    Bildungsbereiche
    Fach- und Sachgebiete
    Physik
    Medientypen
    Lernalter
    6-9
    Schlüsselwörter
    Energy
    Sprachen
    en
    weitere Medien der Reihe:
    Bicycle dynamo
    Photo: A bicycle dynamo.Information and ideas:An example of an electricity generator that converts mechanical energy into electrical ...
    Burning candle
    Photo:A burning candle.Information and ideas:An example of the conversion of chemical energy into thermal ...
    Determining the efficiency of a hand-held mixer (answer sheet)
    Answer sheet: For the worksheet of the same name.Information and ideas:You will find more detailed information on the corresponding worksheet ...
    Determining the efficiency of a hand-held mixer (students instruction)
    Experimention instructions:In 1798, Count Rumford discovered during the boring of cannon barrels that mechanical energy can be converted into heat. ...
    Determining the efficiency of a hand-held mixer (teacher information)
    Teacher information:Teaching methods for teachers on the experiments of the experimentation instructions of the same name. This teaching method ...
    Efficiency of energy conversion
    Interactive graphic:Comparison of the typical efficiencies of energy conversion and energy transfer processes.The efficiency of selected everyday ...
    Energy conversion
    Interactive graphic:Overview of energy forms and possible ways they can be converted.Conversion between two energy forms in both directions is not ...
    Energy conversion
    Content package for interactive whiteboards:Individual media related to energy conversion are compiled here in a meaningful didactic way for teaching ...
    Energy conversion processes in everyday life
    Information sheet:Examples illustrate that energy conversion processes take place in everything that happens. We’re just not always aware of them. ...
    Energy converter
    Matching exercise:What energy forms can be converted into each other?The energy converter is named in the middle. The associated source energy (left) ...


  • Siemens Stiftung
    What do private households use energy for?
    Chart:Percentage energy consumption of German and British private households according to different application areasThe bars show what proportions of the energy consumption in private households are used for room heating, hot water, cooking, lighting, and for electronic appliances. By way of example, the data for Germany and the United Kingdom from 2012 are compared. In addition, the total energy consumption of all households in Germany and the United Kingdom in 2013 is indicated. In addition, the total energy consumption of all African countries south of the Sahara is indicated.As can be seen from the chart, a large proportion of the energy in a household is used for heating and hot water. But considerable energy is also used for running refrigerators. Some of this energy could be saved by using it sparingly and and deliberately.Information and ideas:If you look at the energy consumption of individual areas in their entirety, you will see that heating energy accounts for the largest share at over 60 percent in both countries. From this it follows that there is enormous energy saving potential particularly when it comes to heating. How can that be implemented? A few examples are:• the construction of energy-saving buildings by paying attention to the influence of daylight and ensuring adequate insulation• the purchase of energy-efficient household appliances with energy labels A, A+, and A++.Compared with the two European countries, the energy consumption in Africa is low. One reason for this is that in many regions, only a few people even have access to an energy supply. Information and ideas:What energy-saving measures can students take themselves? Specific energy saving tips can also be found in the “Tips for energy saving in the household” medium.

    Bildungsbereiche
    Fach- und Sachgebiete
    Wirtschaftskunde
    weitere Medien der Reihe:
    Energy comparison of means of transportation (teacher information)
    Teaching methods:Teaching methods for teachers on the worksheet of the same nameThis document states the learning objectives that are pursued with ...
    Energy comparison of means of transportation (worksheet)
    Worksheet:A car, bus, train, and airplane will be compared in terms of their carbon dioxide emissions and energy consumption.Based on the specified ...
    Energy consumption of household appliances
    Chart:The chart shows the electric power consumption and, in some cases, the water consumption of certain household appliances. The average ...
    Energy consumption – comparison between countries
    Matching exercise:The countries China, the United States, Russia, Norway, Germany, Kenya, and the world as a whole are compared in terms of energy ...
    Energy efficiency class
    Photo:Energy label for a washing machineDuring the purchase of electrical appliances, the energy label can help the buyer determine whether the ...
    Energy saving (group work, student instructions)
    Group work:The students will collect information about ways to save energy at home, in traffic and transportation, in lighting, and in ...
    Energy saving (group work, teacher information)
    Teaching methods:Teaching methods for teachers on the student instructions of the same name.A minimum of two double teaching periods should be ...
    Energy saving (mind map)
    Mind map:Different facets of energy saving are visualized.Starting with the question of why energy saving is necessary, the mind map considers the ...
    Energy saving as an energy source
    Schematic diagram:On the basis of selected examples, this overview demonstrates that energy saving itself can be described as an “energy ...
    Everyday energy consumption
    Matching exercise:With this matching exercise students learn exactly what can be done with one kilowatt-hour of energy.Saving energy is an important ...


  • Siemens Stiftung
    Facts about solar energy
    %verview graphic:Schematic representation of the flow of energy from the sun to the earth: How much energy does the sun produce and how much of this reaches the surface of the earth?The sun is the main supplier of energy to the earth, providing about 99.98% of the total energy contribution to the earth's climate. The vast potential offered by the technical use of solar energy as a source of energy is shown clearly by the fact that the current world energy consumption is only 0.006% of the solar energy received. The diagram provides an overview of the quantities of energy given off by the sun and arriving on the earth. It should be noted that 100% of the energy radiated by the sun is ultimately given off again by the earth back into space. The energy balance of the earth is equal at all levels from the surface of the earth into outer space. But watch out: A tiny fragment of the radiated energy is stored by photosynthesis (approx. 0.1%) or by human activities (approx. 0.005%) and remains on the earth for a longer period of time.Information and ideas:To make the illustration clearer, the size ratios of the sun and the earth are not shown to scale. It is taken into account that ultimately 100% of the radiated energy is reflected back into outer space%



  • Siemens Stiftung
    Radiant energy
    Chart:Formulae for the radiant energy of electromagnetic waves and Planck's law of radiation.Radiant energy is the energy of electromagnetic waves. It is proportional to the square of the amplitude of the electrical or magnetic field strength. Electromagnetic waves of high frequency and therefore high energy have the character of particles. The energy of these particles is proportional to the frequency and inversely proportional to their wavelength. The proportionality factor is Planck’s quantum of action h. Max Planck discovered in his investigation of radiation from black bodies that radiation energy must be composed of discrete quanta. He formulated a law of radiation which could not, however, be explained until Einstein postulated light quanta. Numerical example of Planck’s radiation formula:The sun has a surface temperature of 5,800 K; the associated radiant power according to Planck’s radiation formula is 3.85 x 1023 kW. Only a very small proportion of this strikes the earth (with vertical radiation incidence 1.37 kW/m²).Information and ideas:Radiant energy can be converted into other energy forms. In the case of an X-ray radiograph the radiant energy is converted into chemical energy (blackening of the photo film), light is converted into electrical energy in a solar cell, and similarly radio waves in an antenna. The energy of microwaves can be used for heating food.



  • Siemens Stiftung
    Energy converter
    Matching exercise:What energy forms can be converted into each other?The energy converter is named in the middle. The associated source energy (left) and useful energy (right) can be matched by dragging. The matches can be checked individually after each step or at the end of the exercise. The solution can be shown and hidden at any time.This exercise provides an entertaining way to promote understanding of energy converters. It also includes a test function with no limit on the number of attempts. The correct solution can be displayed at any time.Information and ideas:The symbol icons and the energy forms they represent: plug for electrical energy, conical flash for chemical energy, atom for nuclear energy, gears for mechanical energy, sun for radiant energy, and teakettle for thermal energy.

    Bildungsbereiche
    Fach- und Sachgebiete
    Physik
    Medientypen
    Lernalter
    6-9
    Schlüsselwörter
    Energy supply Energy Physics
    Sprachen
    en
    weitere Medien der Reihe:
    Bicycle dynamo
    Photo: A bicycle dynamo.Information and ideas:An example of an electricity generator that converts mechanical energy into electrical ...
    Burning candle
    Photo:A burning candle.Information and ideas:An example of the conversion of chemical energy into thermal ...
    Determining the efficiency of a hand-held mixer (answer sheet)
    Answer sheet: For the worksheet of the same name.Information and ideas:You will find more detailed information on the corresponding worksheet ...
    Determining the efficiency of a hand-held mixer (students instruction)
    Experimention instructions:In 1798, Count Rumford discovered during the boring of cannon barrels that mechanical energy can be converted into heat. ...
    Determining the efficiency of a hand-held mixer (teacher information)
    Teacher information:Teaching methods for teachers on the experiments of the experimentation instructions of the same name. This teaching method ...
    Efficiency of energy conversion
    Interactive graphic:Comparison of the typical efficiencies of energy conversion and energy transfer processes.The efficiency of selected everyday ...
    Energy conversion
    Interactive graphic:Overview of energy forms and possible ways they can be converted.Conversion between two energy forms in both directions is not ...
    Energy conversion
    Content package for interactive whiteboards:Individual media related to energy conversion are compiled here in a meaningful didactic way for teaching ...
    Energy conversion chains
    Matching exercise:Images illustrate energy conversion processes in everyday life, and the involved energy forms can be matched to them. Our everyday ...
    Energy conversion processes in everyday life
    Information sheet:Examples illustrate that energy conversion processes take place in everything that happens. We’re just not always aware of them. ...


  • Siemens Stiftung
    Energy storage
    Information module:Summary of the energy stores that are available with today’s technology.In order for energy to be available whenever it is needed, the energy is stored. This medium shows the most important energy stores for thermal, mechanical, chemical and electric energy. They are extremely important, particularly with a view to using renewable energy sources. Storing energy usually requires conversion processes, since not all forms of energy are equally suitable for storage. This module provides an overview of the efficiency of storage.Information and ideas:In-depth information on energy stores can also be found in the “Renewable energy sources" guideline. The media “Stores for electrical energy" and “How batteries and accumulators work" are also available specifically for electric energy stores. These are provided as individual media on the media portal of the Siemens Stiftung.

    Bildungsbereiche
    Fach- und Sachgebiete
    Chemie Physik


  • Siemens Stiftung
    Chemical energy
    Chart: Chemical energy as binding energy between atoms (as a potential curve in the illustration).Chemical energy is present both in the bond between atoms and molecules as well as in the potential for chemical bonding. This energy can be released in the form of heat during the bonding process or when those bonds are broken. This “heat of reaction" is also referred to as reaction enthalpy (H). The release of heat (dH < 0) is referred to as an exothermic reaction. An endothermic reaction is when heat is absorbed (dH > 0). Every mixture of source materials that can react to produce end products can be regarded as a potential source of chemical energy. Microscopically speaking, this chemical energy can be found in the bonds between individual atoms, as illustrated in the potential curve. Information and ideas:Chemical energy is a form of energy that is easy to store – whether in the human body or in batteries. An additional example is hydrogen as a chemical energy store for renewable energy sources.

    Bildungsbereiche
    Fach- und Sachgebiete
    Chemie Physik
    Medientypen
    Lernalter
    6-9
    Schlüsselwörter
    Chart Energy supply Energy Power generation Renewable energy
    Sprachen
    en


  • Siemens Stiftung
    Stores for electrical energy
    Overview graphic:Examples for direct and indirect stores for electrical energy are shown and the stored energy form is designated.Electrical energy should if possible be generated at precisely the time at which it is needed. This is because electrical energy is difficult and expensive to store. A distinction is made between direct and indirect stores for electrical energy. Electrical energy can only be stored directly in capacitors. With indirect storage, the electrical energy can be converted into a different form of energy which can then be stored. Information and ideas:Students should think about the economical use of the energy stores shown (for example: How much energy can be stored? Can the energy store be used without any problems? Where do losses occur?).

    Bildungsbereiche
    Fach- und Sachgebiete
    Chemie Physik


  • Siemens Stiftung
    An overview of energy sources
    Information sheet:This document provides an overview of the various types of energy sources, how large their respective share is in power generation, and how long they will still be available.Our energy supply comes from a mix of different energy sources that are used in different proportions to supply energy.The individual energy sources are presented and briefly described. However, reserves of fossil energy sources are limited or cannot be used due to the need to limit global warming. For this reason, it will be necessary to increasingly develop energy-efficient technologies and to widely use renewable energy sources.Information and ideas:What does dependency on energy imports mean and how could this problem be solved? To what extent could the more efficient handling of energy – generating, distributing, and using it – help here?

    weitere Medien der Reihe:
    Automotive fuel cell
    Photo:A fuel cell stack for cars is pictured. The dimensions for approximately 40 l volume are approximately 1.0 m x 0.8 m x 0.35 m. A single ...
    Climate and environmental pollution caused by important energy crops
    Information sheet:The table lists the most important energy crops including the use as well as impact on the climate due to nitrogen requirements and ...
    Comparison of electricity production costs from fossil and renewable energy sources
    Information sheet:The production costs for electricity from fossil and renewable energy sources are shown in a table along with additional ...
    Development of greenhouse gas emissions
    Information module: The charts show the Kyoto Protocol targets and the development of greenhouse gas emissions in the ten most important countries ...
    Development of renewable energies worldwide
    Information module:The charts show that the development of renewable energies worldwide is progressing very rapidly. In 2005, the share of renewable ...
    Firewood as biomass
    Photo: Stacked logs Biomass, especially wood, is one of the oldest sources of energy used by humankind. The energy is “obtained” through ...
    Food and animal feed from renewable energy, air, and water
    Information sheet:Alternatives to the high energy and resource consumption of conventional animal feed production are shown. Cultivation of feed in ...
    Geothermal power plant
    Photo: The pictured geothermal power plant meets the overall heating requirements of the Freiham residential and commercial district west of Munich. ...
    Investment costs of various electric power generation plants
    Information sheet:A table compares the investment costs of electric power generation plants for fossil and renewable energy sources as well as ...
    Is biomass climate neutral and sustainable?
    Information sheet:Upon closer observation, the cultivation of most energy crops is neither sustainable nor climate or environmentally neutral. ...


  • Siemens Stiftung
    Renewable energy sources
    Overview graphic: Illustration of renewable energy sources: sun, wind, water, geothermal sources and biomass with an example of a power plant solution for each.Renewable energies are inexhaustible by human standards, since they renew themselves, as it were. Because of their far lower carbon dioxide emissions, they represent an alternative to fossil energy sources. Each renewable energy source is shown combined with a specific use in power plants: sun and a solar thermal power plant, wind and a wind turbine, water and a run-of-river power plant, geothermal energy and geothermal power plant, biomass and biomass power plant.Information and ideas:With this graphics, students are provided with an overview of renewable energy sources. At the same time, a link is created to energy conversion technologies. The graphics can be used as an introduction to the topic of renewable energies and also as a starting point for a discussion of energy sources, energy converters and environmental and ecological factors. Detailed information is given in the guideline on “Renewable Energies".



  • Siemens Stiftung
    Energy saving as an energy source
    Schematic diagram:On the basis of selected examples, this overview demonstrates that energy saving itself can be described as an “energy source.”Five examples from everyday life (electric power and heat generation, power distribution, construction, lighting, and transportation) are used to show how energy saving reduces the consumption of individual energy sources (primary or secondary).Information and ideas:Students can look for further examples. What is the significance of energy saving in relation to the general scarcity of resources? Can it be equated roughly with the harnessing of renewable energy sources?

    Bildungsbereiche
    Fach- und Sachgebiete
    weitere Medien der Reihe:
    Energy comparison of means of transportation (teacher information)
    Teaching methods:Teaching methods for teachers on the worksheet of the same nameThis document states the learning objectives that are pursued with ...
    Energy comparison of means of transportation (worksheet)
    Worksheet:A car, bus, train, and airplane will be compared in terms of their carbon dioxide emissions and energy consumption.Based on the specified ...
    Energy consumption of household appliances
    Chart:The chart shows the electric power consumption and, in some cases, the water consumption of certain household appliances. The average ...
    Energy consumption – comparison between countries
    Matching exercise:The countries China, the United States, Russia, Norway, Germany, Kenya, and the world as a whole are compared in terms of energy ...
    Energy efficiency class
    Photo:Energy label for a washing machineDuring the purchase of electrical appliances, the energy label can help the buyer determine whether the ...
    Energy saving (group work, student instructions)
    Group work:The students will collect information about ways to save energy at home, in traffic and transportation, in lighting, and in ...
    Energy saving (group work, teacher information)
    Teaching methods:Teaching methods for teachers on the student instructions of the same name.A minimum of two double teaching periods should be ...
    Energy saving (mind map)
    Mind map:Different facets of energy saving are visualized.Starting with the question of why energy saving is necessary, the mind map considers the ...
    Everyday energy consumption
    Matching exercise:With this matching exercise students learn exactly what can be done with one kilowatt-hour of energy.Saving energy is an important ...
    Everyday energy-saving lighting
    Photo collage:A floor lamp with an energy-saving light bulb and an LED flashlight are shown as examples of energy-saving lighting.Two examples of ...


  • Siemens Stiftung
    Renewable energy sources and technologies (ES)
    Overview graphic: Illustration of the renewable energy sources sun, wind, and water, each with an example of a power plant solution Renewable energies are inexhaustible by human standards since they renew themselves. They present an alternative to fossil energy sources due to their significantly lower carbon dioxide emissions. Each renewable energy source is shown combined with a specific use in power plants: sun as the energy source and a solar thermal power plant, wind as the energy source and a wind turbine, and water as the energy source and a run-of-river power plant.Information and ideas:The graphic provides the students with an overview of renewable energy sources. At the same time, a connection is established to the technologies for electric power and heat generation. The graphic can be used as an introduction to the topic of renewable energies and simultaneously as a starting point for a discussion on energy sources, energy converters, and the environment and ecology.

    weitere Medien der Reihe:
    An overview of energy sources
    Information sheet:Different energy sources are presented and compared, and examples are given of how these energy sources can be used and in what ...
    Electricity from renewable energy sources
    Content package for interactive whiteboards:Individual media on renewable energies are grouped together in a didactically meaningful way for teaching ...
    From waterwheel to turbine (ES)
    Photo collage: Photos of a waterwheel and three different types of turbines Long ago, people used waterwheels to harness the energy of water, for ...
    Guideline for the “Renewable energies” interactive whiteboard content
    Guideline:This document provides an overview of a possible scenario for using the content package for interactive whiteboards entitled “Renewable ...
    How long will our energy sources last? (ES)
    Chart:A bar chart shows an overview of the remaining years of use of energy sources. Of the fossil energy sources, oil will be the first to run out. ...
    Hydropower experiment
    Experimentation instructions:Instructions for building a waterwheel The students can build a waterwheel using simple resources and thus become ...
    Hydropower experiment (teacher information)
    Teacher information:Teaching method for teachers on the experiments of the experimentation instructions of the same name This teaching method ...
    Renewable energy sources (ES)
    Photo collage:The renewable energy sources sun, wind, and water Information and ideas:Use as an image for discussion to help the students recall ...
    Run-of-river power plant
    Simulation:Operating principle of a run-of-river power plant A run-of-river power plant is used on rivers with a very small fall in elevation and a ...
    Solar cell – Basic principle (ES)
    Simulation:The basic principle of a solar cell is shown in simplified form. Light that strikes a solar cell produces charges in the solar cell. These ...
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