Physics, Primary School
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Electricity
From Turbine to Socket
How is the electricity generated with which we power our appliances in everyday life?
The magic words are ‘charge‘ and ‘voltage‘.
Electricity is created when bodies have different charges. If you rub a balloon with a cloth and hold it close to your hair, the hair is attracted by the balloon. By friction the balloon is charged, thus a voltage is generated between the balloon and the hair. Objects that are differently charged attract each other and the voltage tends to balance itself.
As a rule, matter is neutral. That means the atoms bodies consist of have an equal amount of positive and negative charges. But if you rub specific materials like the balloon and the cloth here, the charges are separated. The electrons with their negative charge are transferred to one object, whereas the other object is charged positively.
However, as matter seeks a balance and wants to equalise the charges, the opposites attract each other. And the greater the separation of the charges, the higher the voltage, and the higher the voltage, the more objects are attracted and seek a balance.
You realise how important and self-evident electricity has become in our everyday lives only when it is no longer there.
At home, household appliances run by electricity would not work anymore. The refrigerator would not cool anymore, the heater would not heat anymore. No washing machine, no telephone, no television, no game consoles – and, of course, we would suddenly be plunged into darkness if the light went out. Even a flashlight would not help because it works with electricity as well even though this electricity does not come from the socket but from a battery. Without electricity we would actually be in the dark.
Curriculum-centred and oriented towards educational standards
Matching
Blogging
The weblog or blog, for short, as a medium is not much older than this century. Blogs came into being in the World Wide Web as ’messages from below’, as web pages from web creators who wanted to share their view of the world with the world. They are short notes, long texts, pictures, videos, which are posted loosely and at random intervals to the world for an undefined public.
Podcasting
Today, the use of new media has become a matter of course not only in everyday life – schools and teaching, too, benefit from the new technologies and methods, which support active and independent learning. Especially in computer science, ethics and language courses but also in all other subjects, modern media are a valuable pedagogic and didactic asset. This DVD uses the example of podcasts to demonstrate how the possibilities opened up by new media can be applied in the classroom and how the pupils can be taught to handle them in a competent and target-oriented manner. The film is aimed at supporting the use of podcasts at school and encourages making them. This also requires the ability to find information on the Internet and assess it. The film informs on the functionality of podcasts and technical background as well as on the teaching and learning possibilities offered by podcasts – ranging from specific contents to superordinate learning targets such as the advancement of creativity and team spirit. The DVD is a useful support for teachers applying new media and wishing to show their pupils how to handle Running Time: 20:29 ms them in a sensible way.
Youth Movement
Dancing until your feet hurt: Here, at the meeting on the Hoher Meissner near Kassel, 3,500 participants from Boy Scout associations, youth and Wandervogel groups from all over the German-speaking region have gathered. They want to celebrate, simply get to know each other and commemorate a historic anniversary.