Bild

Siemens Stiftung

Detection reaction for unsaturated fats (1)

Photo:
The reagents olive oil (on the left) and butter (on the right) in test tubes with diluted acetic acid.

For this experiment, 40 ml of acetic acid (5 ml of vinegar essence to 35 ml of water) was placed in each of two test tubes. Then 10 mI of olive oil was added to the left test tube. Two lab spatulas of butter were added to the right test tube.

Anderer Ressourcentyp, Experiment, Handbuch

Siemens Stiftung

Experimento | 10+ guide book binder

All documents from the Experimento | 10+ guide book binder combined into one PDF file.

The 352-page document contains the complete printed version of the Experimento | 10+ guide book binder. It includes all teacher and student instructions for the 54 experiments related to energy, the environment, and health. In addition, it includes general information, such as the table of contents, the educational-didactic introduction, lists of materials, and the "Electrical measurements and circuits? basic course.

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).

Anderer Ressourcentyp

Siemens Stiftung

The various types of soaps

Information module:
Useful information on the five most common types of soap: Curd soap, soft soap, fine and toilet soap, moisturizing and clinical soap, and shaving soap.

Soaps are the alkali salts of fatty acids.
The information module provides the definition of the five most common types of soap and an overview of their composition, raw materials, production, possible uses, and advantages and disadvantages.

Information and ideas:
The students can also make their own soap. Instructions can be found on numerous sites on the Internet.

Anderer Ressourcentyp

Siemens Stiftung

Saponification and digestion of fat

Interactive chemical equations:
The chemical equations for the alkaline saponification of fat and the breakdown of fat in human digestion can be developed interactively.

Word and reaction equations are shown for the alkaline saponification of fat; only the word equation is shown for the breakdown of fat in human digestion.
The equations can be developed in two ways:
· Entire equation at once
· Individually by educts and products.

Arbeitsblatt

Siemens Stiftung

A3 Boosting battery performance (worksheet 5)

Worksheet for subject teaching in English:
For the student experimentation instructions of the same name. Methodology tool: picture sequence / cloze test developed by Josef Leisen and Heinz Klippert.


Note: This worksheet has been developed especially for subject teaching in English and for language-sensitive subject teaching. It uses the picture sequence and cloze test methodology tools developed by Josef Leisen and Heinz Klippert. The picture sequence is used to train students how to correctly comprehend and then explain the chronological and logical sequences of events. The cloze test is used to review and summarize a topic. It is also suited for internal differentiation.
Students whose native language is not English and who do not have strong English skills receive support and training in understanding the technical vocabulary. They work with the specialized vocabulary and in this way acquire the ability to communicate about specific subjects.


Dieses Material ist Teil einer Sammlung

Anderer Ressourcentyp

Siemens Stiftung

A3 Boosting battery performance (worksheet 5 answer sheet)

Answer sheet:
For the worksheet of the same name for subject teaching in English.

You can find more detailed information on the associated worksheet for subject teaching in English "A3 Boosting battery performance (worksheet 5),? which is available on the media portal of the Siemens Stiftung.


Dieses Material ist Teil einer Sammlung

Bild

Siemens Stiftung

Detection reaction for unsaturated fats (4)

Photo:
Addition of soluble starch to olive oil (on the left). The starch serves as an indicator of "free iodine? through the formation of a blue iodine/starch complex.

Note: The test tube must be shaken before the detection result can be evaluated.

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.