Anderer Ressourcentyp

Siemens Stiftung

C4 pH value of beverages (teacher instructions)

Experimentation instructions for Experimento - 10+:
Background information on the content and practical information on conducting the experiment "pH value of beverages - How acidic is it in the stomach?".


This is a typical introductory experiment. The experimentally acquired finding that "humans can tolerate extremely acidic beverages" leads to the conclusion that "it must be very acidic in the stomach". The question is "why?". This automatically introduces us to the topic of the digestive tract and digestion. Depending on the age group, the teacher can and must deal with the topic in more detail. Apart from the topic of digestion in biology lessons, students? basic knowledge of acids and bases can be put to excellent use in the experiment in chemistry lessons. The materials supplied allow eight groups of students to conduct the experiments simultaneously.

Notes:
· Observe the safety information in the instructions as well as the applicable safety guidelines for your school.
· All materials mentioned in the instructions will have to be purchased directly from commercial sources.

Anderer Ressourcentyp

Siemens Stiftung

C4 pH value of beverages (answer sheet)

Answer sheet:
For the student experimentation instructions of the same name.

The answer sheet contains sample answers to all questions asked in the student experimentation instructions. In some cases, the answers are very short, often only in the form of key words. Depending on the learning objective, they can be augmented and enlarged upon with additional material from textbooks or Internet research.
Likewise, the answer sheet will be elaborate on the analyses for the individual subexperiments, but only in cases where experience shows that there could be difficulties.

You will find more detailed information in the related experimentation instructions "C4 pH value of beverages (student instructions)", which are available on the media portal of the Siemens Stiftung.

Anderer Ressourcentyp

Siemens Stiftung

C3 How does human digestion break down fats? (student instructions)

Experimentation instructions for Experimento - 10+:
Detailed instructions and questions for students on conducting the experiment "How does human digestion break down fats? - Saponification of edible oil". This experiment comprises two subexperiments.


The experiment comprises two subexperiments:

· We emulsify oil
· Saponification of edible oil

For each subexperiment, the students are first provided with an overview of the materials to be used and safety information. This overview is followed by the detailed, step-by-step instructions for conducting the experiment. Afterwards, the students are asked to note their observations. Specific questions are used to guide the students as they analyze the results of the experiments. At the end, the students are asked probing questions related to the experiment (an answer sheet is available for teachers).

Notes:
· Observe the safety information in the instructions as well as the applicable safety guidelines for your school and discuss it with your students.
· This student instruction is also available in Word format (doc-file).

Anderer Ressourcentyp

Siemens Stiftung

C3 How does human digestion break down fats? (link list)

Link list:
Further information on the experiment "C3 How does human digestion break down fats? - Saponification of edible oil".

The links can be used for preparing or for further study of experiments from Experimento - 10+.

Anderer Ressourcentyp

Siemens Stiftung

C5 What functions does the skin have? (link list)

Link list:
Further information on the experiment "C5 What functions does the skin have? - The skin as a sense organ".

The links can be used for preparing or for further study of experiments from Experimento - 10+.

Anderer Ressourcentyp

Siemens Stiftung

A3 Lemon batteries and other batteries (link list)

Link list:
Further information on the experiment "A3 Lemon batteries and other batteries - Electricity from chemical energy".

The links can be used for preparing or for further study of experiments from Experimento - 10+.

Anderer Ressourcentyp

Siemens Stiftung

A5 Properties of solar cells (answer sheet)

Answer sheet:
For the student experimentation instructions of the same name.

The answer sheet contains sample answers to all questions asked in the student experimentation instructions. In some cases, the answers are very short, often only in the form of key words. Depending on the learning objective, they can be augmented and enlarged upon with additional material from textbooks or Internet research.
Likewise, the answer sheet will be elaborate on the analyses for the individual subexperiments, but only in cases where experience shows that there could be difficulties.

You will find more detailed information in the related experimentation instructions "A5 Properties of solar cells (student instructions)", which are available on the media portal of the Siemens Stiftung.

Anderer Ressourcentyp

Siemens Stiftung

A3 Lemon batteries and other batteries (student instructions)

Experimentation instructions for Experimento - 10+:
Detailed instructions and questions for students on conducting the experiment "Lemon batteries and other batteries - Electricity from chemical energy". This experiment comprises six subexperiments.


The experiment comprises six subexperiments:
· How well does the "fruit and vegetable battery" work?
· The "lemon battery": What role does each element play?
· The "lemon battery" without the lemon
· Boosting battery performance
· Spontaneous copper plating?
· A professional zinc-copper battery

For each subexperiment, the students are first provided with an overview of the materials to be used and safety information. This overview is followed by the detailed, step-by-step instructions for conducting the experiment. Afterwards, the students are asked to note their observations. Specific questions are used to guide the students as they analyze the results of the experiments. At the end, the students are asked probing questions related to the experiment (an answer sheet is available for teachers).

Notes:
· Observe the safety information in the instructions as well as the applicable safety guidelines for your school and discuss it with your students.
· This student instruction is also available in Word format (doc-file).

Anderer Ressourcentyp

Siemens Stiftung

Reaction to produce sucrose

Interactive chemical equations:
The chemical equation for the production of sucrose can be developed interactively as a word equation and reaction equation.

The two equations can be developed in two ways:
· Entire equation at once
· Individually by educts and products.

Arbeitsblatt

Siemens Stiftung

Separating plastic waste (task)

Worksheet:
How do you separate plastics, for example, for waste recycling? Task with a contextual scenario.

A short story leads to the task?s question. The students should think of an experiment with which they can separate three types of plastic with different densities as easily as possible.

Incremental hints for answering this task are available under "Separating plastic waste (hints)? on the media portal of the Siemens Stiftung.
Explanations of the experiment for the teacher are found in "Separating plastic waste (teacher information).?