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Anderer Ressourcentyp

Siemens Stiftung

Does combustion make things heavier or lighter? (hints)

Incremental hints:
The five hints and answers for the worksheet of the same name prepared for printing. The last hint presents the complete solution.

Working with incremental hints allows weaker students to develop a solution independently, helping them gain a sense of achievement and experience learning success. The document provides assistance related to the content and learning strategy for solving the task from the worksheet of the same name.

Information and ideas:
The students who did not use the hints to solve the task should also read the last hint with the complete solution to compare their results.
The hints in the prepared tasks have been designed so that they can be printed double-sided. Additional information on how the hints are used is compiled in the teaching methods named "Tasks with incremental hints - An introduction? that are available on the media portal.

Anderer Ressourcentyp

Siemens Stiftung

Foam fire extinguisher (teacher information)

Teaching methods:
Teaching methods for teachers on the worksheet of the same name

In order to complete the task, the students must have previously learned about the reaction of sodium bicarbonate (baking soda) with citric acid and how to interpret it. The task can be worked through on a purely experimental level or else with prior knowledge of chemistry. The students should definitely have the basic idea that gases formed in a closed container generate pressure.
Degree of difficulty of the task: medium.
The teaching methods provide teachers with all the important information on using the worksheet of the same name and the related incremental hints in class. The scientific background on the task and possible variations are provided.
The five incremental hints for the task are provided with their answers. They are also available as a separate ready-to-print medium named "Foam fire extinguisher (hints)? on the media portal of the Siemens Stiftung.

Anderer Ressourcentyp

Siemens Stiftung

The Ear, Hearing and Hearing Impairment: How does screen reading software work? (link list)

Link list:
Selected links for working on the inquiry task of the same name.

Information and ideas:
Suitable as a source for Internet inquiry for teachers and students alike.

Anderer Ressourcentyp

Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Hearing (link list)

Link list:
Many interesting links regarding the topic "Hearing".

Information and ideas:
Suitable as a source for internet inquiry for the teacher and students.

Anderer Ressourcentyp

Siemens Stiftung

Communication (link list)

Link list:
Many interesting links regarding the topic "Communication".

Information and ideas:
Suitable as a source for internet inquiry for the teacher and students.

Primärmaterial/Quelle

Siemens Stiftung

Ultrasound localization bat

Website:
Visualization of the ultrasound localization system in bats.

Bats orientate themselves not with their eyes, but with their ears using ultrasound calls. They have an orientation system that is similar to radar. This system is so sensitive that it can even pick up fine wires only 0.1 mm in diameter. In flight, they emit localization calls through their mouths, in some species through their noses, and their large ears hear the echoes.

Information and ideas:
Explorative learning is supported.

Relevant for teaching:
Reception of impulses and information processing
Our senses open up our surroundings
Sound/acoustics: audible range, hearing limit
Communication, understanding

Anderer Ressourcentyp

Siemens Stiftung

Overcoming water shortages

Information module:Small and large, local and regional solutions for overcoming water shortages.Water can be made available for individual households in arid regions, for example using mobile filter systems ("SkyHydrant") or "watercones.” Long-distance water supply systems or wells supply arid regions with drinking water.Seawater desalination or reforestation are measures that can be taken on a global scale for supplying drinking water.Information and ideas:The overview shows that different measures can be taken depending on the supply needs to be met.The "Measures and technologies to address water shortages” information sheet provides detailed explanations of the processes that are abbreviated in the information module.

Anderer Ressourcentyp

Siemens Stiftung

Why does a dog pant? (interactive hints)

Incremental hints (interactive):Six hints and answers are given for the worksheet of the same name in an HTML file.Working with incremental hints allows weaker students to develop a solution independently, helping them gain a sense of achievement and experience learning success. The document provides assistance related to the content and learning strategy for solving the task from the worksheet of the same name.Information and ideas:The hints and the answers can be used online via the QR code on the worksheet.

Medientypen

Anderer Ressourcentyp

Lernalter

11-15

Schlüsselwörter

Evaporation

Sprachen

Englisch

Experiment

Siemens Stiftung

7. Electronics - 7.3 Transistors (teacher instructions)

Experimentation instructions:Background information on the content and practical information on conducting the "Transistor" experiment.The experiment provides students with the opportunity to learn about transistors which are used in almost every technological device. Transistors are the fundamental components of modern electronics ranging from cooking stoves, car ignitions and household air-conditioners to control systems and airplanes, to name just a few of millions of examples. Transistors have also been central to the development of logical operations and computers. In short: Transistors are key to understanding and working with electronics.One item deals with "Technical application and vocational orientation".Information and ideas:• Particularly in this experiment, we recommend your students to do the additional experiment described in "Doing further research”.• See also the additional Information about LEDs.• There are two basic types of transistors, NPN and PNP. The experiment uses an NPN transistor (negative-positive-negative). NPN- and PNP-transistors have to be inserted differently to function correctly, i.e. to turn the transistors on. NPN- and PNP-transistors look the same. The part number printed on them distinguishes them from regular transistors. For example, a common NPN-transistor has the part number BC 547 or BC 548 printed on the component; a PNP-transistor may have the part number BC 548. If you use regular transistors, you can look up their datasheets online.In contrast to the wiring of a buzzer as in the first experiment, which is an electrical circuit, the transistor circuit is an electronic circuit.The transistor is key to understanding electronics. It is recommend to do the further research with all students, as this will provide additional learning and will reinforce the understanding of a transistor. When conducting both experiments and discussing them, be sure to schedule enough time for your lessons, as 45 minutes will not suffice.

Anderer Ressourcentyp

Siemens Stiftung

The wind

Video (01:12 minutes):Wind is caused by the movement of air masses. The video shows how this works and how people make use of the wind.The video starts with several typical occurrences and effects of wind (for example, wind damage to trees), and then shows past and present uses of wind energy. It explains the buoyancy of hot air based on the example of a hot air balloon. An animation explains how wind is caused by the exchange of layers of cold and warm air in the atmosphere.This video is an excerpt from the teaching DVD, "Luft und Atmung - Lernzirkel".

Bildungsbereiche

Allgemeinbildende Schule Sekundarstufe I

Fach- und Sachgebiete

Biologie

Medientypen

Anderer Ressourcentyp

Lernalter

11-15

Schlüsselwörter

Power generation Weather observation

Sprachen

Englisch