Dein Suchergebnis zum Thema: have/"<b

Collection of ideas for a large number of project topics involving hydrogen as a future energy source and energy store. Students can work on the individual topics on their own or in groups. Information and ideas: “Water in power generation can be used to provide ideas for additional project topics.
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The total annual precipitation of the individual cities can be compared with each other. The precipitation and temperature curves indicate the climates. The precipitation and temperature data are from 1961-1990. Information and ideas: Students learn how to read climate diagrams and should be able to assign the individual locations to the various climates. From the diagrams, students can draw conclusions on the role of water in agriculture in the various regions.
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The topic water treatment has a wide range of references to many science subjects and topics. The key physical, chemical, biological and technical aspects of the topic are presented and put in context by the guideline. Information and ideas: The same processes, sometimes with different refinements, are often used in drinking, non-potable and process water treatment as in waste water treatment. An aide for the teacher, but suitable for detailed use by students.
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Activated carbon can be used as a filter for molecular substances. Due to the large number of pores in the activated carbon, as well as the very small pore size (1 to 50 nm), the surface area of these pores adds up to around 10,000 times more than the surface area of normal charcoal. The graphic shows the typical pore sizes and clearly illustrates how the large “internal” surface area of activated carbon is achieved. The graphic can be labeled individually or as a whole.
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One circuit is shown for the charging process and another for the discharging process. The capacity of the capacitor integrated in the circuit can be varied. Starting with a capacitor with air as the dielectric and a defined area and defined plate separation, the following variations are possible: • Doubling of the plate separation • Doubling of the plate area • Insertion of a glass plate between the capacitor plates The associated current and voltage curves for the charging and discharging processes can be displayed independently of each other for different capacities.
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The work assignment includes a graphic and three photos: The graphic and the first two photos show an application with everyday relevance. The last photo is intended as a further idea. Specific work assignments guide the students in examining the technologies shown, provided that this is possible for the students in the lower grades. Information and ideas: • The text in the information sheet of the same name provides help in finding the answer. It also includes a lot of additional information. • The answer can be found in the answer sheet of the same name. These work assignments are designed to open a window to technology within the context of Experimento | 8+. The teacher and students should together go into more detail about technologies that are addressed in the experiments or develop the basic principles of the technical applications shown in the photos in order to reflect on and transfer the scientific knowledge gained in the experiment. Because technology is not a central learning objective of Experimento | 8+, the students are encouraged to examine the technology that surrounds them, but they should not be instructed to carry out extensive research to find a solution. The latter also cannot be expected of the students due to the complexity of the technical applications shown.
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The work assignment includes two photos: The first photo shows an application with everyday relevance. The second photo is intended as a further idea. Specific work assignments guide the students in examining the technologies shown, provided that this is possible for the students in the lower grades. Information and ideas: • The text in the information sheet of the same name provides help in finding the answer. It also includes a lot of additional information. • The answer can be found in the answer sheet of the same name. These work assignments are designed to open a window to technology within the context of Experimento | 8+. The teacher and students should together go into more detail about technologies that are addressed in the experiments or develop the basic principles of the technical applications shown in the photos in order to reflect on and transfer the scientific knowledge gained in the experiment. Because technology is not a central learning objective of Experimento | 8+, the students are encouraged to examine the technology that surrounds them, but they should not be instructed to carry out extensive research to find a solution. The latter also cannot be expected of the students due to the complexity of the technical applications shown.
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In fuels cells, hydrogen “burns“ with oxygen to form water. The hydrogen and oxygen molecules are ionized at catalytically activated electrodes. In the process hydrogen loses electrons which are taken up by oxygen. The information module shows this “original principle of the fuel cell and explains (graphically and in the form of an animation) a modern membrane fuel cell with polymer membrane, a so-called PEM fuel cell. Its use in power plants is presented. In this application solid oxide fuel cells (SOFC) are generally used. The parameters of PEM and SOFC fuel cells are compared. Information and ideas: Fuels cells are also used in combination with gas turbines in power plants.
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In fuels cells, hydrogen “burns“ with oxygen to form water. The hydrogen and oxygen molecules are ionized at catalytically activated electrodes. In the process hydrogen loses electrons which are taken up by oxygen. The simulation shows this “original principle of the fuel cell and explains (graphically and in the form of an animation) a modern membrane fuel cell with polymer membrane, a so-called PEM fuel cell. Its use in power plants is presented.
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The students will investigate the solubility of clay, salt, silica sand, dish detergent, and cooking oil in water and record their guesses and observations in tables. The instructions first include a photo and a list of the required apparatus and materials. Text and pictures explain the preparations for the experiment step by step. Then several assignments are presented: The students should express their guesses, conduct the experiment, and note down their observations. Information and ideas: • Observe the safety information in these instructions as well as in the teacher information related to the experiment and discuss them with your students. • Also observe the applicable safety guidelines for your school.
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