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9 results

Energy-saving Lamps

Energy-saving lamps are energy-efficient illuminants which will step by step replace energy-intensive illuminants. This replacement has been laid down in an EU framework directive. This directive has resulted in two laws, according to which, for example, conventional light bulbs are to be replaced by energy-efficient lamps such as compact fluorescent or halogen lamps.

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A battery is a portable source of chemical energy, which is converted to electrical energy as soon as the battery is placed in a circuit. The main principle is the same in almost all batteries. A metal that forms the negative terminal is opposite a positive terminal. The positive terminal is also called anode, the negative terminal cathode. Between the two terminals there is an electrically conductive liquid, the so-called electrolyte. As soon as a battery is placed in a circuit, positive and negative terminals are connected via an external contact and electrolysis takes place. On the way, a current flows from anode to cathode

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Source of Energy

Energy determines our lives. Without energy, plants, animals and humans would not be able to live. Without energy, there would be no movement. But what is energy? Where does it come from and how is it used – yesterday, today, tomorrow? The DVD provides an illustrative introduction into the highly topical issue of energy. Starting with the human perception, it leads us to the cosmic primal source, the huge fusion power plant above our heads – to the sun. In doing so, it explains how energy reaches the Earth and is used here in different ways by plants, animals and humans. The physics part clears up the terms work, power and degree of efficiency. The DVD shows what conversion losses occur in the process from primary energy to useful energy, of course including the clarification that energy can neither be generated nor lost in a physical sense. The ecological, economic and social sustainability is discussed. This way, it is made clear that only Renewable Energy – thus energy from the Sun – can secure our future.

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Wind Energy

Our future lies in renewable energies. The fossil fuels coal, oil and gas will be used up within the next 50 to 300 years and are ecologically questionable just like nuclear energy, too. The sun, however, provides more energy than we need. Besides water power, sun light and bio mass, WIND ENERGY, most crucially, belongs to the renewable energies that have been used already for centuries. But what is wind? How was its energy generated, transformed and used in the past and how is this done today?

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Solar Energy

80 % of our current energy needs are covered by fossil fuels (coal, oil, gas). Their supply may soon lead to severe problems as worldwide stocks will be exhausted one day. That is why the future belongs to renewable energy from sun, wind, water, and biomass. The Sun as an inexhaustible energy source is estimated to be available to us for another 4.5 billion years to come. It supplies us with “clean energy“ that is available everywhere on earth and that exceeds worldwide energy needs many times over. The film presents the pupils with the long history of solar energy use. The functioning of solar collectors, solar cells and solar power plants is explained, the current operating ranges of solar technology are dealt with and an outlook for the future is provided. With the act on the phasing-out of nuclear energy Germany has taken over a pioneering role worldwide in the field of renewable energies. Together with the extensive accompanying material the DVD is ideally suited for use in the classroom.

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Water Energy

Energy Is Everywhere It is everywhere. Within and all around us. It creates storms and moves the stars of our universe just as it makes a butterfly fly. It makes the plants grow and keeps the atoms together. Without it, we could not move, think and act. Without it, we would not be alive. Our world would not work as we know it if it did not exist: energy. Cars, television or light in your living-room – all our technology only works with the help of energy.

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Smart Grid

The turnaround in energy policy is meant to lead away from the old system of centralised power stations, from the conventional energy sources such as coal, oil or nuclear power. Instead, energy is to be generated in a lot of smaller installations from renewable sources such as sun or wind. That leads to a new structure of energy supply. The turnaround requires a new, intelligent system with which the energy exchange between generator and consumer will be controlled in the future. The English term “smart grid“, which translated means nothing other than ’intelligent electricity network’, represents this system of the future.

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Hybrid Drives

When Lena goes through the city centre by car, she has to be particularly careful, because her car is almost inaudible and therefore pedestrians often hear it just in the nick of time. For in the city centre, her car is powered by electricity. The power is provided by a strong battery in the boot.

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Herkömmliche und erneuerbare Energien

In unserem Arbeitsheft Umwelt 7-9, Vol. 1 – Herkömmliche und erneuerbare Energien finden Sie 50 interaktive und didaktisch aufbereitete Aufgaben.

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