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The Ear, Hearing and Hearing Impairment;: Sense organ tongue

Photo:
The tongue as sense organ. We use it to taste with - sweet, sour, salty or bitter?

We can perceive tastes with our tongue. To do this we have receptors in different areas of our tongue.
Each region recognises a different sort of taste.
Very subtle differences, however, can usually only be distinguished with the help of the sense of smell!

Information and ideas:
Students can study the different regions and test them:
- bitter: back part of the tongue
- sour: right and left edges of the tongue, more to the back
- salty: middle - edges left and right
- sweet: tip of the tongue

Relevant for teaching:
The human body
Structure and function of a sense organ
Reception of stimuli and processing of information
Senses discover the environment

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The Ear, Hearing and Hearing Impairment: Sense organ of balance

Labeled graphic:
Structure of sense organ of balance with labeling of most important parts.

The sense organ of balance is located next to the hearing organ (cochlea) in the inner ear.
The sense organ of balance is made up of the vestibule and the semi-circular canals. Distinction is made between the sense of position and the sense of rotation.
Sense of position:
The vestibule with saccule and utricle which enable us to perceive our spatial position as well as straight movements.
Sense of rotation:
The three semi-circular canals which enable us to perceive rotational movements.

Information and ideas:
This graphic shows very clearly where the sense organs of balance (sense of position, sense of rotation) are located in the inner ear. It is also clear where they are in relation to the structure of the cochlea.

The graphic can be used as introduction to the topic or to give an overview in order to be able to explain individual parts and sensory organs of the ear.

The teacher can work on the graphic together with students at the computer or get the students to label it themselves either as a printout or at the computer.

Relevant for teaching:
Structure and function of a sensory organ
Reception of stimuli and processing of information.

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The Ear, Hearing and Hearing Impairment: Sense of position - world not upside down

Photo:
Visual illustration of the sense of position at work: child is hanging upside down from bar and is not losing sense of direction.

We know even with our eyes closed whether we are upside down or whether we are holding our head down. Yes, even with our head down, we can see things the right way up. Our sense of position is the reason for that.

Information and ideas:
Use picture as introduction to sense of position: children enjoy such situations like this one at the playground. Children can tell the class and teacher when they become aware of their sense of position, (e.g. when they are on a roller coaster).

Relevant for teaching:
The human body
Structure and function of a sensory organ
Reception of stimuli and processing of information
Senses discover the environment

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The Ear, Hearing and Hearing Impairment; Teaching unit: From the drum to the eardrum: Resonance body piano

Photo:
Grand piano and piano are good examples of the great significance of resonance bodies with regard to volume and sound.

The frame and the air in the piano vibrate in resonance with the string that has just been struck. Whereas the more modern grand piano "fills" whole concert halls, its historical predecessor, the spinet, is just loud enough for the living-room. Apart from the volume the tone colour of the spinet is also much thinner. This comparison makes the importance of the resonance body very clear - both generally in the production of sound and specifically in music.

Information and ideas:
A practical example from the field of music shows how important the subjects of Physics and Acoustics are for the world of art and communication.

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

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Redox flow cell

Schematic diagram:
The redox flow cell is an accumulator and works, so to speak, with liquid electrode materials, e.g., with zinc (Zn) and bromine (Br).

The graphic shows the flow of the electrode material during discharging of the cell. Two graphite electrodes (black surfaces) collect the current. Zinc is oxidized at its electrode, while the bromine is reduced at its electrode.
During charging, voltage is applied and the two solutions are pumped past the electrodes again.

Information and ideas:
What advantages does this process have over conventional galvanic cells?

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The Ear, Hearing and Hearing Impairment: Police car

Photo:
Police car as typical road user.

Information and ideas:
Use picture to start discussion or for illustration purposes.

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Noise and concentration - for example music

Photo:
You can do homework more quickly with music on? Tests show this only applies to routine tasks. Otherwise music is more like disturbing noise.

Is music relaxing pleasure or a disturbing noise? This is a very subjective matter. Objectively the answer depends on the specific situation!

Information and ideas:
This question "Music on when doing homework?" is an evergreen. Maybe an objective answer can be reached using the criteria of concentration and effectiveness?

Relevant for teaching:
Hearing defects/hearing impairment
How hearing works
Damage to the sense organs
Noise
Personal health care

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Motorbike

Photo:
Motorcyclist as typical road user.

Above all, when motorbikes drive fast, they become loud road users, with levels of up to 80 decibels being recorded.

Information and ideas:
Use picture to start discussion or for illustration purposes.

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Lens and imaging equation

Schematic diagram:
The light rays emanating from the object must be collected through a lens to form the points of an image. The imaging equation describes the applicable laws.

At least two of the following rays are needed to construct the image:
· Ray from the object parallel to the optical axis (parallel ray)
· Ray from the object through the focal point of the lens (focal ray)
· Ray from the object through the central point of the lens (central point ray).

The central point ray passes through the lens without changing direction. The parallel ray passes through the focal point on the other side of the lens, and the focal ray becomes the parallel ray.

Note: The imaging equation is also frequently known as the "lens equation."

Information and ideas:
What are lenses needed for?

Medientypen

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Lernalter

13-18

Schlüsselwörter

Light Optics

Sprachen

Englisch

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Siemens Stiftung

Inner ear section

Labeled graphic:
Section view with the most important parts of the inner ear. The most important parts are highlighted in color.

Both the sense of balance and the sense of hearing are situated in the inner ear.
The inner ear is formed by a complicated system of cavities. This system is called the bony labyrinth.
Distinction is made between the cochlea, the semi-circular canals and, in between, the vestibule. In the cochlea there are two openings each covered with a taut membrane. These are named after their shape, i.e. round window and oval window. The oval window is a sort of entrance for sound and the round window a sort of exit.

Information and ideas:
Helps to put the inner ear in the overall context of the structure of the ear.
Can be used, for example in a worksheet, for work together in class with the digital projector, as overhead transparency.

Relevant for teaching:
Structure and function of a sensory organ
Reception of stimuli and transmission of information
Functions of senses

Medientypen

Bild

Lernalter

11-18

Schlüsselwörter

Anatomy (human) Ear

Sprachen

Englisch