Simulation

Siemens Stiftung

; Physics and chemistry of water: The natural water cycle

Interactive graphic:
The natural water cycle can be developed step by step.

In this graphic, the water cycle is divided into eight segments that can be displayed in succession by clicking the "Next? button. A short explanation can be displayed for each segment by clicking the corresponding button.

Simulation

Siemens Stiftung

Photovoltaics - basic principle

Simulation:
Photovoltaics is the conversion of light into electrical energy. From the physics aspect it is an example of the important role that the quantization of energy also plays in the conversion of energy.

Light quanta impinging on a semiconductor generate conduction electrons at higher potential due to the internal photo effect. From there they can flow away via the external circuit and can be used. This effect is dependent on the energy of the photons and on the semiconductor material. An animation shows how the electric current flows in the photocell. Graphics explaining the internal photo effect in a semiconductor and the energy diagram of the solar cell can also be displayed.

Information and ideas:
Where are photocells used for producing electric power? What efficiency can be attained?

Simulation

Siemens Stiftung

Physics and chemistry of water: Operating principle of the fuel cell

Information module:
Operating principle of the fuel cell. It is the ideal source of electric power if hydrogen becomes established as a renewable energy source.


In fuels cells, hydrogen "burns" with oxygen to form water. The hydrogen and oxygen molecules are ionized at catalytically activated electrodes. In the process hydrogen loses electrons which are taken up by oxygen. The information module shows this "original principle" of the fuel cell and explains (graphically and in the form of an animation) a modern membrane fuel cell with polymer membrane, a so-called PEM fuel cell. Its use in power plants is presented. In this application solid oxide fuel cells (SOFC) are generally used. The parameters of PEM and SOFC fuel cells are compared.

Information and ideas:
Fuels cells are also used in combination with gas turbines in power plants.

Simulation

Siemens Stiftung

Daniell cell (simulation)

Simulation:
Electron flow in the Daniell cell


The simulation shows the discharge process of a galvanic cell based on the example of the Daniell cell. The stream of electrons in the metallic conductor of the external circuit is completed in the element?s electrolyte by a stream of sulfate ions.

Simulation

Siemens Stiftung

Cómo se forma simetría rotacional

Simulación:
Se muestra cómo se crean patrones con simetría rotacional, lo que se constata a través de la congruencia.


La animación izquierda ilustra la rotación de un cuadrado en torno a su centro.
Con el botón de reproducción se inicia la animación. Esta se puede interrumpir en cualquier momento pulsando el botón de pausa. Al pulsar el botón "Texto recordatorio? se abre una ventana de texto en la que se muestra un resumen de la información más importante sobre la simetría rotacional. Haciendo clic en la ventana de texto esta se vuelve a ocultar.

Medientypen

Simulation

Lernalter

6-10

Schlüsselwörter

Figura geométrica Geometría

Sprachen

Spanisch

Dieses Material ist Teil einer Sammlung

Simulation

Siemens Stiftung

The Ear, Hearing and Hearing Impairment;: Listening walk

Interactive quiz:
Experiencing what the ear is capable of from a virtual listening walk. For training the sense of hearing.


Listening walks are designed to make the ears more conscious of the sounds in the environment. Over time, awareness of noises and sounds will increase, leading to the development of an ability to distinguish between sounds.
Normally, the students are blindfolded during the listening walks so that they concentrate on their ears? perception. The wealth of information that we receive via our ears is fascinating.
A listening walk starts with the conscious perception of sounds in a certain situation or at a certain location.
Students are introduced to an inner conscious hearing experience.

Information and ideas:
The teaching idea of a listening walk has been implemented as virtual sense training on a PC.
The students experience typical sounds during a virtual walk and have to identify where they happen to be.

The listening walk can be experienced with the class as a whole (presentation using digital projector) or individually on a PC.

Relevant for teaching:
Games to train the senses
Structure and function of a sense organ
Senses discover the environment


Simulation

Siemens Stiftung

The Ear, Hearing and Hearing Impairment;: Hearing test for children

Interactive hearing test:
Which animals can you hear? This test, based on normalized tones, is good for initial diagnosis of hearing problems!

This is a simplified version of a more comprehensive hearing test that has been modified especially for children. Even though it does not provide exact information about hearing problems, it motivates the children to be aware of their hearing. If each child is tested individually under the supervision of the teacher, the test is even suitable as an initial diagnosis of hearing problems. (The animal sounds used are normalized.)

Sequence:
The computer has to be calibrated first of all (the right volume has to be set). It has to be ensured that the reference tone is adjusted to "no longer audible?. Younger students in particular will need help with this. Or the teacher calibrates one computer beforehand and the students all do the test at that computer.
To answer, the students have to click "Can hear it? or "Cannot hear it?.
At the end there is an evaluation.

Information and ideas:
Poor hearing can be a reason for reading and spelling difficulties. A hearing test may give the first indication of hearing problems.
After the test the teacher can discuss possible causes of hearing damage with the students or talk about necessary changes of conduct and possible protective measures.

Relevant for teaching:
Hearing damage/hearing impairment
How hearing works
Games to train the senses


Simulation

Siemens Stiftung

Sehvorgang

Simulation:Der Sehvorgang beim menschlichen Auge wird schrittweise gezeigt. Zu jedem Teilschritt kann eine kurze Erklärung eingeblendet werden.

Simulation

Siemens Stiftung

Energiespeicherung und -freisetzung am Beispiel Wasser

Simulation:Prinzip der Energiespeicherung und Freisetzung am Beispiel Wasser, animiert dargestellt.Die Energie steckt streng genommen nicht nur in den Molekülbewegungen und -schwingungen sondern auch im Übergang zwischen den Aggregatzuständen. Wobei Wasser beim Verdampfen bzw. Kondensieren aufgrund der starken Wasserstoffbrückenbindungen relativ viel Energie aufnimmt bzw. freisetzt. Hinweise und Ideen:Als Grundlage für das Thema “Wasser als Energiespeicher” und “Wasser in der Energiegewinnung”, was unter anderem wichtig ist für die Wärmekraftmaschinen, wie z. B. die Dampfmaschine. Auch ohne in die Thermodynamik einzusteigen, wird bereits hier deutlich, woher Dampfmaschinen ihre Energie beziehen: Der überhitzte Wasserdampf hat hohen Wärmeenergieinhalt. Dies entspricht bei gleichem Volumen einem hohen Druck, der einen Kolben bewegen kann.


Simulation

Siemens Stiftung

Catalysis principle

Interactive graphic:
The influence of a catalyst on the rate of a chemical reaction is shown. As a comparison, the reaction rates without a catalyst or with an increase in temperature can also be observed.

Click "Start? to start the reaction.
Use the following buttons to change the reaction parameters:
· Click "Temperature? to increase the temperature at which the reaction takes place from 25°C to 600°C.
· Click "Catalyst? to add a catalyst.
Click "Reset? to return to the initial state (25°C, no catalyst, no reaction).