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For a fire to occur, three conditions must be met: There must be combustible material, enough oxygen, and a sufficiently high initial temperature to provide the necessary activation energy. The video shows how firefighters deal with this so-called "burning triangle" and gives an overview over the best extinguishing methods.

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White deposits on water taps and scale in kettles are the result of hard water. Water hardness is a measure of the concentration of calcium and magnesium ions in water. This film shows how water hardness is measured and which consequences the hardness of water has. Also methods for softening water are shown.

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Iron occurs naturally as mineral iron core. Before it can be used in the industry, it must first be processed into iron or steel. The film explains how blast furnaces are constructed and what chemical processes take place inside them before steel or alloys are finally produced with the addition of other metals.

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The natural limestone cycle: Carbonated water flows over limestone, the calcium carbonate reacts with the carbonic acid and forms calcium hydrogen carbonate. When this water evaporites, the mixture of dissolved carbon dioxide, carbonic acid and calcium hydrogen carbonate turns back into calcium carbonate and carbon dioxide.

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We see crystals everywhere in nature. They fascinate us with their shape and repetition - but how are they formed? This video looks at the various types of crystals, shows their formation in experiments and explains important terms and concepts such as the crystal lattice, quasi crystals and the law of constant angles.

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Copper is one of the metals humans have been using the longest. In nature, it can be found in its pure form as nuggets, and humans began using it 10,000 years ago. Copper can be worked easily when smelted and cast. Using various experiments, this film demonstrates copper´s properties and its reactions with other substances.

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We encounter sodium in various forms in many places in everyday life, including the kitchen. The film introduces sodium and sodium hydroxide, points out their differences, and demonstrates their material properties by means of experiments. The very different uses of the reactive element are also shown.

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There are different groups of substances to which substances are assigned according to their characteristic properties. The film shows what these properties are, namely the state of aggregation, the melting or boiling temperature, metallic sheen, hardness, density, solubility and finally conductivity.

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This film is about the technical limestone cycle. Limestone is mined and processed industrially. Carbon dioxide bound in limestone is dissolved and forms calcium oxide. When water is added, calcium carbonate forms in an exothermal reaction. It reacts with carbon dioxide in the air, forming calcium carbonate again.

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In neutralization reactions, the pH values of acids and bases cancel each other out. The film shows this using the reaction of hydrochloric acid and caustic soda as an example. The products are described, the titration procedure and the use of neutralization reactions in everyday life are demonstrated.

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This film is about the separation methods that can be used to split mixtures into their different components. It explains the separation methods decantation, sedimentation, sink-float separation, centrifugation, picking, filtration, evaporation, distillation, adsorption, extraction, chromatography, and combinations thereof.

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The atmospheric greenhouse effect - a warming of the Earth´s surface by heat trapped by the sun - is what made our planet habitable in the first place. This video explains in detail how this effect works and identifies the differences between the natural and the threatening man-made greenhouse effect.

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A redox reaction happens when oxidation and reduction take place simultaneously. Redox reactions are necessary to extract metals like iron or copper. This video explains what oxidizing agents and reducing agents are, why some metals don´t easily react with oxygen, and uses experiments to demonstrate redox reactions.

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Metals that quickly release electrons, electron donors, are called non-precious. Electron acceptors, i.e., metals that release only very few or no electrons at all, are precious. Metals can be put into an order, the electrochemical series, according to the readiness with which they release electrons.

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To find out whether a liquid is acidic or alkaline, indicators are used to measure pH levels. The pH scale ranges from 0 (extremely acidic) to 14 (extremely alkaline). Pure water sits in the middle of the scale with a pH of 7. Using various experiments, this film shows how to measure the pH levels of aqueous solutions.

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Synthetic fibers are made from petroleum and natural gas. This video takes a look at organic and synthetic molecule chains as well as thermoplastic and duroplastic materials, explains the difference between monomers and polymers and gives a brief overview over the history of synthetic fibers like Nylon.

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Imagining modern life without plastics is almost impossible. We use them in construction, as food packaging, paints, or clothing. Polymerization is the reaction used in their manufacture. This video takes a closer look at how monomers are combined to form polymers and gives a brief overview over the history of plastics.

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Petroleum is one of the most important raw materials. We have been using it for almost 200 years - intensively so for 100. Most of it is used for heating and other energy needs. But petroleum is also indispensable in the production of drugs and other products. Because it is a finite resource, it gets less and less.

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The particle model helps us get an idea of the structure and properties of substances. Sugar, for instance, can appear as rock candy, granulated sugar or icing, and can even be fully dissolved in water - all without a change to its particles. This film visualizes the particle model using different experiments.

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Nitrogen from the Earth´s atmosphere is converted by bacteria and then processed by plants. Humans and animals ingest these nitrogen compounds in their food. The nitrogen is returned to the soil in animal excrement that contains urea and in rotting plants. This film shows the nitrogen cycle and the Haber-Bosch process.

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The film gives an overview of the material properties of thermal and electrical conductivity. Examples and experiments are used to explain how well heat and electricity are passed on through various solid and liquid substances. In this context, the video explains the concept of electrical resistance.

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Topics of this film are fats and fatty oils. Chemists call them lipids, and they are a key component of our diet. If the substance is solid or semi-solid at room temperature we call it fat, if it is fluid we call it oil. Its correct technical name is "fatty oil" because - from a chemical point of view - there are other oils.

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It is the most abundant element on Earth and almost all living beings need it - oxygen. Under normal conditions, it is a colourless and odourless gas, occurring as a two-atom molecule. This video explains oxygen´s properties, shows its position in the periodic table, and demonstrates its high reactivity in several experiments.

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Each element has a name. The subject of this film is how the naming is done. The names consist of the names of the elements in combination with a multiplication affix and a suffix. This film explains the nomenclature (i.e., the naming system) of inorganic compounds in an entertaining and step-by-step manner.

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Oxidation is a chemical reaction. It runs when a candle is burning or a rocket is launched. An old rusted iron fence is actually the result of oxidation. And oxidation reactions even take place in our bodies. In this video, the characteristics of chemical reactions are explained and illustrated through different examples.

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Exothermic chemical reactions give off more energy than they themselves need for their process. The film explains combustion, which is the most important exothermic reaction - we use it to produce heat for example. It is the most commonly used chemical reaction, and it is also the oldest one known to mankind.

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Zuerst zeigt der Film Aufbau und Arbeitsweise des menschlichen Auges. Im zweiten Teil geht es um Licht und andere elektromagnetische Strahlung. Der dritte Teil folgt den Entdeckungen, die Isaac Newton mit einem Prisma machte. Experimente verdeutlichen interessante Eigenschaften des Lichts.

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Sulfur was already used 5000 years before Christ to bleach textiles and as a disinfectant. As one of the most reactive elements, sulfur consists of atoms arranged in a ring. The video introduces the different forms of sulfur and shows in several experiments how it behaves and reacts with other elements.

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Kein Satz funktioniert ohne Prädikat, und die wenigsten Prädikate funktionieren ohne ein Subjekt, das der Handlungsträger im Satz ist. Das E-Learning-Modul erklärt, was es mit dem Subjekt auf sich hat, und bietet Schülerinnen und Schülern die Möglichkeit, ihr Wissen spielerisch und interaktiv zu überprüfen.

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Mithilfe adverbialer Bestimmungen kann man andere Satzglieder näher beschreiben. Das E-Learning-Modul stellt die vier verschiedenen Möglichkeiten zur Bestimmung vor und ermöglicht es den Schülerinnen und Schülern, ihre neuen Kenntnisse direkt spielerisch in interaktiven Aufgaben zum Thema anzuwenden.

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