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Siemens Stiftung

How long will our energy sources last?

Chart:
A bar chart shows an overview of the remaining years of use of primary energy sources.

Of the fossil energy sources, petroleum will be the first to run out. What is the situation for the other fossil energy sources? Can new technologies delay the point in time when they run out? And is it really true that renewable energy sources never run out?
The time axis has a logarithmic scale.

Information and ideas:
Students learn that the logarithmic scale represents numbers ranging over several powers. More in-depth information regarding how long energy sources will last is provided in the "An overview of energy sources? information sheet.


Dieses Material ist Teil einer Sammlung

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Siemens Stiftung

Global energy supply - future development

Chart:
The development of the global energy supply from 1990 to 2035 is shown.

Reliable figures are available through 2012; from that date forward, the International Energy Agency must rely on estimates. The represented figures refer to the more optimistic New Policies Scenario, which takes into account political announcements and plans of governments, for example, to reduce CO2 emissions, although they have not yet been implemented. The estimated energy consumption for 2035 is 12,001 mtoe.

Using the following source: International Energy Agency (IEA)


Dieses Material ist Teil einer Sammlung

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Siemens Stiftung

Food production - "energy hog?

Interactive graphic:
Production stages for a food until it is eaten, with the energy consumption and energy-saving potential for each stage.

An industrially produced foodstuff generally has to travel a long way before it lands on our plate. This is illustrated graphically using an example of a food (chicken wings). At each step, the graphic shows what energy is needed for and what measures could be taken to save energy. Synthetic amino acids are named as one energy-saving possibility. All essential amino acids (for example, methionine) can be produced synthetically today and would save up to 95 percent of the energy if used in feed, compared, for example, with growing soy beans. In addition, the use of freshwater and pollution with fertilizers and pesticides would be reduced. Further potential for saving energy can be discussed.

Information and ideas:
Because this media file shows energy consumption in the context of food production and consumption, monitoring one?s own consumption would be appropriate. Students should think of meals for one day that use as little energy as possible for production, transportation, consumption, and waste disposal. The thoughts can range from mostly unprocessed products to completely synthetic products.
The "Meat and sustainability? animated film is suitable to get the students thinking.


Dieses Material ist Teil einer Sammlung

Anderer Ressourcentyp

Siemens Stiftung

Link list for "The tropical rainforest" interactive whiteboard content

Link list:
Additional links on the topic of rainforests.


Additional information on the topic of "rainforests" for class (e.g., WebQuests, images, informational texts, games) or as background information for teachers.


Anderer Ressourcentyp

Siemens Stiftung

Link list for the media package "Humanitarian aid - drinking water filters in use"

Link list:
Many interesting links on the topics of "Drinking water shortage", "Humanitarian aid", and "Membrane filters".


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

Video

Siemens Stiftung

Meat and Sustainability

Video:
Animated film that clearly shows the impact of high meat consumption in Germany

On average, each German eats nearly 90 kilograms of meat per year. That is excessive and problematic in many ways. Industrial production of meat is unsustainable in many aspects - area of land use, global food supply, climate change, animal rights, pollution, and health.

What problems are specifically caused by industrial meat production? What are the global consequences? What can be done about it?


Dieses Material ist Teil einer Sammlung

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Siemens Stiftung

Speech signal - individual word

Chart:
Screenshot of the oscillographic curve of the spoken word "dogs".

Speech sounds are fluctuating sound signals where the composition of frequencies changes all the time.
Aperiodical overlap periodical parts. Unlike noises, some of which have similar frequency curves, sound in speech is always the carrier of meaning or of messages sent out by the speaker. Other noises like smacking of lips, hissing, rhythms, basic pitch are typical of the individual (acoustic fingerprint) but not essential for the speech content!

Information and ideas:
Supplementary to worksheets and transparencies.

Relevant for teaching:
Sound/acoustics: parameters
Vibrations and waves
Communication and understanding

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Siemens Stiftung

Speech recognition sentence - syllable - phoneme

Chart:
The components of speech, from phoneme to sentence presented visually.

The graphic shows the oscilloscope curve of the spoken sentence "It?s raining cats and dogs" and excerpts from the units from which speech is composed: sentence, word, phoneme.

Information and ideas:
Speech recognition and speech synthesis are very topical themes in the field of information and communication technology.
Further information on this graphic is available as information sheet on the media portal of the Siemens Stiftung.

Relevant for teaching:
The human body
Structure and function of a sense organ
Reception of impulses and information transmission
Sensory perception

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Siemens Stiftung

Perforation of the eardrum

Labeled graphic:
Simplified illustration of a perforated eardrum.

A perforated eardrum can occur when foreign bodies, for example, instruments to clean the ears, are stuck in too far or when there are loud bangs near the ear.
Violent blows to the ear can also cause perforation.

Minor tears or perforations can heal up by themselves provided they get the proper treatment. In any case, a doctor should always be consulted!

Information and ideas:
Can be used for illustration purposes on the subject of "Ear diseases" either on transparencies or worksheets. Supposedly "harmless" minor problems can turn into serious damage to the ear.

Relevant for teaching:
Hearing defect/hearing impairment

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Siemens Stiftung

Phase diagram of water

Diagram:
A P-T diagram for pure water. The lines indicate the temperature and the pressure at which the solid, liquid, and vapor phases exist in equilibrium. All three phases exist in equilibrium only at the triple point; otherwise, there are a maximum of two phases.

In addition to the equilibrium curves (melting pressure curve, sublimation curve, vapor pressure curve), the diagram also includes the pressure and temperature data for the melting, boiling, triple, and critical points.
Attention: The axes of the diagram are not shown true to scale.

Information and ideas:
This diagram also reflects the density anomaly of water (lower density in the solid state than in the liquid state): The melting pressure curve shows a negative slope. The reason for the density anomaly is the hydrogen bonds.